Re: [Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
Yesterday I upgraded Ubuntu 22.04 to 24.04.1 and the bug is now gone On Mon, Sep 2, 2024 at 6:51 PM Sütő Norbert <2062...@bugs.launchpad.net> wrote: > GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_iommu=igfx_off" > > > It also fix on my side. > > -- > You received this bug notification because you are subscribed to a > duplicate bug report (2077291). > https://bugs.launchpad.net/bugs/2062951 > > Title: > Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu > 24.04) > > Status in Linux: > New > Status in linux package in Ubuntu: > In Progress > Status in linux-hwe-6.8 package in Ubuntu: > Invalid > Status in linux source package in Jammy: > Invalid > Status in linux-hwe-6.8 source package in Jammy: > Confirmed > Status in linux source package in Noble: > Fix Committed > Status in linux-hwe-6.8 source package in Noble: > Invalid > Status in linux source package in Oracular: > In Progress > Status in linux-hwe-6.8 source package in Oracular: > Invalid > > Bug description: > SRU Justification > > [Impact] > The flickering predominantly occurs when the mouse cursor is in the > bottom quarter of the screen and stops when the cursor leaves this area. > Extensive testing across various kernel versions revealed that the issue > became apparent from kernel version 6.8.0 onward, correlating with the > mentioned configuration changes, CONFIG_INTEL_IOMMU_DEFAULT_ON and > CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON. > The problem persists in the latest drm tip. > > [Fix] > As an immediate workaround, adding 'intel_iommu=igfx_off' to the kernel > command line has been found to effectively eliminate the flickering issue. > This patch proposes the same behavior as 'intel_iommu=igfx_off' and > apply the rule to all Intel SKL GPU IDs. > > [Test] > 1. Boot up to desktop with 6.8.0-x kernels > 2. Moving cursor around the desktop > 3. There should be no flicker while cursor is moving > > [Where problems could occur] > For virtualized environments using hardware-assisted virtualization for > graphics (such as VFIO or mediated pass-through), disabling IOMMU for > graphics could either disable these features or reduce their security and > efficiency. > Usually, users pass the 'intel_iommu=on' by themselves when they are > using related features. So, the impact of this change is minimal. > > === > > After migrating Mantic 23.10 install to Linux 6.8.0, I am experiencing > heavy flickering at random. > It happens after a moderate to heavy on screen activity like window > switching, scrolling etc. > It never happens when playing video or when there is no interaction > using keyboard/pointer. > > It tend to happen when the mouse cursor is in the bottom quarter of the > screen and stops immediately when the cursor leaves that screen region. > Around the same time the following appears in kernel log: > kernel: i915 :00:02.0: [drm] *ERROR* CPU pipe A FIFO underrun > > Happens on both X11 and Wayland on both KDE plasma and Mate (though > less). > > I first encountered the issue with Linux 6.8.0-11 and it still happens > with Ubunutu's 6.8.0-28 and Mainline 6.8.7. > Kernels 6.6, 6.5, 6.1 and older did not have that issue. > > Hardware is: Dell XPS 9350, Vendor Intel, Driver i915, Skylake GT2 [HD > Graphics 520] > Software: Ubuntu 23.10, KDE Plasma 5.27.10 / Mate 1.26 > > Attaching kernel log for 6.8.0-28 > > To manage notifications about this bug go to: > https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions > > -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_iommu=igfx_off" It also fix on my side. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
Having the same issue with external monitor occasional flicker. Moving the mouse stops the flicker when it occurs. Happens every 15 to 30 minutes. Adding intel_iommu=igfx_off to /etc/default/grub resolved the issue for me too. GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_iommu=igfx_off" VGA compatible controller: Intel Corporation Skylake GT2 [HD Graphics 520] (rev 07) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
Hi Bozsoki, From the schedule, 2024.08.05 cycle will release 6.8.0-44 kernel. So, the optimise schedule will be at the end of Oct, which is 8 weeks later. https://kernel.ubuntu.com/ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
Hi AceLan Kao, When is version 6.8.0-45.45 expected? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
Further to my comment #75, the workaround no longer works after the latest update. It worked with kernel linux-image-6.10.6-zabbly+ but no longer works with kernel linux-image-6.10.7-zabbly+ This is incredibly frustrating and upsetting. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
To add some useful information to this, a workaround (explained in duplicate bug #2078054) is to install the Zabbly mainline kernel [1]. This also seems to be related to bug #2049248 (but not a duplicate). As far as I can tell, this affects certain Intel displays, though I could be wrong. [1] https://github.com/zabbly/linux -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
for me, sudo apt install linux-oem-22.04 reduced significantly the occurence of the flickering but did not eliminate it completely! 81XM Lenovo IdeaPad S145-15I, GPU: Intel UHD Graphics 620, OS: Ubuntu 24.04 LTS x86_64, Kernel: 6.8.0-41-generic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
I've submitted SRU for all Skylake GPU, and looks like we need to add KBL GPU to the list, too. Jeffery in #65 and Abdullah in #72 use KBL. We don't have SRU cycle in Sep., so will wait for another month to collect more info and submit another SRU later. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
I'm having a similar issue.. https://bugs.launchpad.net/ubuntu/+source/linux-hwe-6.8/+bug/2077220 Using 'intel_iommu=igfx_off' has been fixed my problem -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
Thanks @acelankao <3 I can confirm the issue is fixed when upgrading to `sudo apt install linux-oem-24.04` (upgrades to `6.8.0-1011-oem` in my case). I had the same issue with a fresh Ubuntu 24.04 (kernel 6.8.0-41-generic) and a completely new Dell XPS 13 9340 with the non-touch internal display. External monitors are no problem. The horizontal lines only appear when moving the mouse. My hardware: Base: XPS 13 9340 Processor: Intel(R) Core(TM) Ultra 7 Prozessor 155H (24 MB Cache, 16 Cores, up to 4,8 GHz) LCD: 13,4", FHD+ 1.920 x 1.200, 30–120 Hz, ohne Touchfunktion, reflexionsarm, 500 cd/m2, EyeSafe, InfinityEdge Memory: 64 GB, LPDDR5X, 7.467 MT/s, integriert, Dual-Channel Hard Drive: First Drive M.2-PCIe-NVMe-SSD mit 2 TB Graphics/Video memory cards: Intel ARC Grafik -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
Hi Leonardo, Yes, we know the MTL flickering issue, you can try using "i915.enable_psr2_sel_fetch=0". The fix is planning to be landed on 6.8.0-45.45 or later. Or you can try switching to use 6.8-oem kernel which already includes the fix. sudo apt install linux-oem-22.04 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
Hi I am on Ubuntu 22.04 and I am having this flickering issue too. lspci -nnk | grep -A3 VGA :00:02.0 VGA compatible controller [0300]: Intel Corporation Device [8086:7d55] (rev 08) Subsystem: Dell Device [1028:0c6b] Kernel driver in use: i915 Kernel modules: i915, xe uname -r 6.8.0-40-generic I tried to add intel_iommu=igfx_off to /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT= but does NOT seem to work I still have the flickering at my PC is not usable. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
** Changed in: linux-hwe-6.8 (Ubuntu Noble) Status: Confirmed => Invalid ** Changed in: linux-hwe-6.8 (Ubuntu Oracular) Status: Confirmed => Invalid ** Also affects: linux (Ubuntu Jammy) Importance: Undecided Status: New ** Also affects: linux-hwe-6.8 (Ubuntu Jammy) Importance: Undecided Status: New ** Changed in: linux (Ubuntu Jammy) Status: New => Invalid ** Changed in: linux-hwe-6.8 (Ubuntu Jammy) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
Status changed to 'Confirmed' because the bug affects multiple users. ** Changed in: linux-hwe-6.8 (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
Status changed to 'Confirmed' because the bug affects multiple users. ** Changed in: linux-hwe-6.8 (Ubuntu Noble) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
** Also affects: linux-hwe-6.8 (Ubuntu) Importance: Undecided Status: New ** Tags added: regression-update -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
** Tags added: jammy -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
I experienced these graphical glitches on my Dell E7270 (with HD Graphics 520) and "intel_iommu=igfx_off" appears to have cured them. But noting that I only ever saw the glitches very occasionally (maybe once every few hours) and couldn't reliably reproduce. In any case, I've used the system for a few hours after rebooting with "intel_iommu=igfx_off" and have not observed any glitches. Thanks all! $ lspci -nnk | grep -A3 VGA 00:02.0 VGA compatible controller [0300]: Intel Corporation Skylake GT2 [HD Graphics 520] [8086:1916] (rev 07) DeviceName: Onboard IGD Subsystem: Dell Skylake GT2 [HD Graphics 520] [1028:06db] Kernel driver in use: i915 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
** Changed in: linux (Ubuntu Noble) Importance: Undecided => Medium ** Changed in: linux (Ubuntu Noble) Status: In Progress => Fix Committed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
> And in this bug, we are trying to fix the flicker issue that can be worked > around by intel_iommu=igfx_off > I'll need your VGA PCI ID if intel_iommu=igfx_off works for you. >lspci -nnk | grep -A3 VGA $ lspci -nnk | grep -A3 VGA 00:02.0 VGA compatible controller [0300]: Intel Corporation UHD Graphics 620 [8086:5917] (rev 07) DeviceName: Onboard IGD Subsystem: Dell UHD Graphics 620 [1028:081c] Kernel driver in use: i915 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
I believe there are 2 types of flicker issues. If disable PSR works for you, you can attach your panel edid on bug 2069993 sudo get-edid > edid.bin Our colleague will help you adding your panel to the driver. And in this bug, we are trying to fix the flicker issue that can be worked around by intel_iommu=igfx_off I'll need your VGA PCI ID if intel_iommu=igfx_off works for you. lspci -nnk | grep -A3 VGA -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
Thanks Jeffrey, I didn't see your post before I updated. Yes it appears I'm experiencing a bug with the latest i915 driver (linked above) and not exactly the bug reported here -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
Alright, I tried everything here and the only thing that fixes it for my system is: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash options i915.enable_psr=0" in /etc/default/grub I don't need intel_iommu=igfx_off Ref: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/11762 ** Bug watch added: gitlab.freedesktop.org/drm/i915/kernel/-/issues #11762 https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/11762 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
> model name : Intel(R) Core(TM) Ultra 7 155H Hi Sean, this processor does not appear to have a Gen9 GPU. You are likely experiencing another bug. You may consider opening a new bug report. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
The proposed workaround does not work for me. user@userpc:~$ cat /proc/cmdline BOOT_IMAGE=/vmlinuz-6.8.0-40-generic root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash vt.handoff=7 intel_iommu=igfx_off user@userpc:~$ uname -a Linux user-ivrnd-intel 6.8.0-40-generic #40-Ubuntu SMP PREEMPT_DYNAMIC Fri Jul 5 10:34:03 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux user@userpc:~$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description:Ubuntu 24.04 LTS Release:24.04 Codename: noble user@user-ivrnd-intel:~$ head /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 170 model name : Intel(R) Core(TM) Ultra 7 155H stepping: 4 microcode : 0x1c cpu MHz : 400.000 cache size : 24576 KB physical id : 0 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
I'm having a similar issue on a T480 with a discrete Nvidia Geforce MX150 and Intel UHD Graphics 620 Recently updated to Xubuntu 24.04 from 22.04 and now after a random amount of time purple lines appear from the bottom of the screen and then it goes black, similar to this Reddit post - https://www.reddit.com/r/thinkpad/s/KM38RtoCOo If I leave it until the display goes to sleep and then wake it, it recovers. If I attempt to interact with it, I have to force a reboot. Not doing anything specific when it happens, sometimes just streaming. Happens both connected to AC power and not The only thing I can see that could be related in the logs is *ERROR* CPU pipe A FIFO underrun in syslog Added intel_iommu=igfx_off to GRUB_CMDLINE_LINUX_DEFAULT - will post again if that doesn't resolve the issue -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
Thanks for reporting the issue, here is the SRU https://lists.ubuntu.com/archives/kernel-team/2024-August/152750.html -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
** Description changed: + SRU Justification + + [Impact] + The flickering predominantly occurs when the mouse cursor is in the bottom quarter of the screen and stops when the cursor leaves this area. + Extensive testing across various kernel versions revealed that the issue became apparent from kernel version 6.8.0 onward, correlating with the mentioned configuration changes, CONFIG_INTEL_IOMMU_DEFAULT_ON and CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON. + The problem persists in the latest drm tip. + + [Fix] + As an immediate workaround, adding 'intel_iommu=igfx_off' to the kernel command line has been found to effectively eliminate the flickering issue. + This patch proposes the same behavior as 'intel_iommu=igfx_off' and apply the rule to all Intel SKL GPU IDs. + + [Test] + 1. Boot up to desktop with 6.8.0-x kernels + 2. Moving cursor around the desktop + 3. There should be no flicker while cursor is moving + + [Where problems could occur] + For virtualized environments using hardware-assisted virtualization for graphics (such as VFIO or mediated pass-through), disabling IOMMU for graphics could either disable these features or reduce their security and efficiency. + Usually, users pass the 'intel_iommu=on' by themselves when they are using related features. So, the impact of this change is minimal. + + === + After migrating Mantic 23.10 install to Linux 6.8.0, I am experiencing heavy flickering at random. It happens after a moderate to heavy on screen activity like window switching, scrolling etc. It never happens when playing video or when there is no interaction using keyboard/pointer. It tend to happen when the mouse cursor is in the bottom quarter of the screen and stops immediately when the cursor leaves that screen region. Around the same time the following appears in kernel log: kernel: i915 :00:02.0: [drm] *ERROR* CPU pipe A FIFO underrun Happens on both X11 and Wayland on both KDE plasma and Mate (though less). I first encountered the issue with Linux 6.8.0-11 and it still happens with Ubunutu's 6.8.0-28 and Mainline 6.8.7. Kernels 6.6, 6.5, 6.1 and older did not have that issue. Hardware is: Dell XPS 9350, Vendor Intel, Driver i915, Skylake GT2 [HD Graphics 520] Software: Ubuntu 23.10, KDE Plasma 5.27.10 / Mate 1.26 Attaching kernel log for 6.8.0-28 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
** Also affects: linux (Ubuntu Noble) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Oracular) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: Confirmed ** Changed in: linux (Ubuntu Noble) Status: New => In Progress ** Changed in: linux (Ubuntu Oracular) Status: Confirmed => In Progress ** Changed in: linux (Ubuntu Noble) Assignee: (unassigned) => AceLan Kao (acelankao) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
@acelankao The patched kernel (without any parameters) seems to be working without any issues. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
This kernel added the SKL ID to the quirk which did the same thing as intel_iommu=igfx_off We may have to carry these quirks before Intel provides a real fix. Please give it a try and I'll submit SRU later. https://people.canonical.com/~acelan/bugs/lp2062951/ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
Update: Thanks to @jeff250 it seems like we narrowed the issue to kernel config changes between 6.6 and 6.8 in Ubuntu kernels. Unfortunately, proper fix is still not available but we have a working workaround (intel_iommu=igfx_off). More details can be found at upstream bug report: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/11504 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
@jeff250 - can confirm this has fixed it for me as well intel_iommu=igfx_off Huge thanks! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
** Changed in: linux Status: Unknown => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
@Rapha there was already one, it's also linked here now. ** Also affects: linux via https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/11504 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
@jeff250 you nailed it - thank you for finding that. No more problems on my computer (Intel® Core™ i5 CPU M 560 with Intel Core Processor Integrated Graphics Controller i915, Thinkpad T410) According to [this section](https://www.kernel.org/doc/html/v6.8/arch/x86/iommu.html?highlight=intel_iommu#graphics- problems), a bug report should be filed. I wonder if this bug report is enough or another one is needed? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
> Thank you for doing your research into the issue but I am confused by > your results. > > Are you claiming that removing mentioned Ubuntu specific commit resolves > the issue? Specifically it's the first commit where I experience the bug, so I would assume that reverting it will resolve the issue. The commit enables the following compile time kernel config options: CONFIG_INTEL_IOMMU_DEFAULT_ON=y CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON=y These enable the Intel IOMMU by default (although it can still be disabled by the linux command line at runtime via Grub). For completeness here is the corresponding commit in the noble kernel: https://git.launchpad.net/~ubuntu- kernel/ubuntu/+source/linux/+git/noble/commit/?id=77e530c1a864c601b96622db03bc1f38e51155f1 > What about the fact that the issue also affect upstream/mainline > kernels? I don't know how the kernel config values for the mainline builds that I linked to were derived, but in the build that I tried (built July 25 2024) the above config options were also enabled. I don't know if this is because the upstream kernel has now enabled these config options by default or if the builds that I linked to still use custom Ubuntu config options. > Are you trying to say that the issue is just related to the conditions > described in the commit and intel_iommu=igfx_off? Specifying intel_iommu= on the linux command line is a way of overriding at runtime whatever is specified by the CONFIG_INTEL_IOMMU_DEFAULT_ON config option when the kernel is compiled. Specifying intel_iommu=off would be the way to completely undo the config changed by the problematic commit, but since the bug that we are experiencing only (to my knowledge) affects graphics, I figured that intel_iommu=igfx_off would be more conservative workaround, as it only disables Intel's integrated graphics from going through the IOMMU but otherwise keeps the IOMMU enabled. It's not exactly clear to me what the benefits of having graphics going through the Intel IOMMU are, but if Intel's IOMMU was only enabled recently in Ubuntu kernels then I just assume that I won't miss whatever those benefits are. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
@jeff250 Thank you for doing your research into the issue but I am confused by your results. Are you claiming that removing mentioned Ubuntu specific commit resolves the issue? What about the fact that the issue also affect upstream/mainline kernels? Are you trying to say that the issue is just related to the conditions described in the commit and intel_iommu=igfx_off? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
Hello, upgraded from ubuntu 23.10 to 24.04, when at the first time I saw flickering. some attempts: 1) sudo gedit /etc/modprobe.d/i915.conf options i915 enable_psr=1 (0 value was what I found there) 2) sudo gedit /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT="intel_pstate=guided quiet splash options i915 enable_psr=0" this resulted in unknown parameter: 3) sudo gedit /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT="intel_pstate=guided quiet splash options i915.enable_rc6" this is what (it seems up to now that) worked: 4) sudo gedit /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT="intel_pstate=guided quiet splash intel_idle.max_cstate=1" for attempts 2-4 grub was updated and then rebooted. Regards! specs: ## Hardware Information: - **Processor:** Intel® Core™ i5-7200U × 4 - **Graphics:**Intel® HD Graphics 620 (KBL GT2) ## Software Information: - **OS Name:** Ubuntu 24.04 LTS - **Windowing System:**Wayland - **Kernel Version:** Linux 6.8.0-39-generic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
Despite some of the nondeterminism behind this bug, I believe I have bisected this bug to the following commit in the Ubuntu kernel tree: 14ebfcacaeb07b02235f2ea881fd6e34e3de0d6f . More info is available on this commit here: https://git.launchpad.net/~ubuntu- kernel/ubuntu/+source/linux/+git/unstable/commit/?id=14ebfcacaeb07b02235f2ea881fd6e34e3de0d6f The commit text reads: > UBUNTU: [Config] enable Intel DMA remapping by default > BugLink: https://bugs.launchpad.net/bugs/1951440 > > We have tried in the past to enable CONFIG_INTEL_IOMMU_DEFAULT_ON and > CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON (starting with Jammy), but > there were multiple issues (especially with old hardware), so we ended > up disabling these options afterwards, see LP: #1971699. > > Considering that IOMMU is enabled by default in upstream kernels, > probably most of these issues are solved now (or old hardware has been > decommissioned). > > Moreover, having this enabled by default can prevent potential issues > with modern hardware and drivers (see for example LP #1958004). > > Acked-by: Philip Cox > Acked-by: Andrei Gherzan > Signed-off-by: Andrea Righi The commit text even predicts that the commit may introduce problems with older hardware. Its predictions appear unfortunately accurate. Operating under the assumption that this commit introduced the bug, as a workaround, I have found that adding: intel_iommu=igfx_off to the GRUB_CMDLINE appears to resolve the issue for me. Unfortunately, there appears to be no relief in the newest kernels. I tried the latest daily build available here: https://kernel.ubuntu.com/mainline/daily/ ...and found that the issue still persists there with the default GRUB_CMDLINE. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
had a similar issue here https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062950 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
Same issue Linux cxl 6.8.0-38-generic #38-Ubuntu SMP PREEMPT_DYNAMIC Fri Jun 7 15:25:01 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux Gnome 46 Wayland HP EliteBook 850 G3 Intel Core i5-6300U Intel HD Graphic 520 (SKL GT2) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
I have this issue on integrated Intel UHD Graphics 620. Usually when mouse pointer is on the bottom of the screen, either side. It's very random and hard to reproduce but I could try to record with a different device. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
Me too. I did the things below. I'll now test if the flicerking is gone. Interesting quote above: "running on battery also seems to worsen the problem slightly.". I normally use my laptop on power, but on battery for the past days. So that might be reason I only noticed it now. sander@witje:~$ lsmod | grep -e ^i915 i915 4276224 17 sander@witje:~$ sudo nano /etc/default/grub sander@witje:~$ cat /etc/default/grub | grep i915 GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.enable_dc=0 intel_idle.max_cstate=2" sander@witje:~$ sudo update-grub Sourcing file `/etc/default/grub' Generating grub configuration file ... Found linux image: /boot/vmlinuz-6.8.0-38-generic Found initrd image: /boot/initrd.img-6.8.0-38-generic Found linux image: /boot/vmlinuz-6.8.0-36-generic Found initrd image: /boot/initrd.img-6.8.0-36-generic Found memtest86+ 64bit EFI image: /boot/memtest86+x64.efi Warning: os-prober will not be executed to detect other bootable partitions. Systems on them will not be added to the GRUB boot configuration. Check GRUB_DISABLE_OS_PROBER documentation entry. Adding boot menu entry for UEFI Firmware Settings ... done -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
It affect me as well. I have Intel(R) UHD Graphics (CML GT2) and using i915 driver. Added below lines to grub: i915.enable_dc=0 intel_idle.max_cstate=2 No luck. Then changed it to: i915.enable_dc=0 intel_idle.max_cstate=4 as per some suggestions Also no luck. I experienced the issue a few years back. Can't remember the Ubuntu version then. After adding above lines it was OK. Then after a kernel update it was all fine even without adding the above lines. Now, after upgrading to 24.04 the problem came back. It happens randomly for a coupe of seconds every an hour or so. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
@acelankao Reported upstream: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/11504 ** Bug watch added: gitlab.freedesktop.org/drm/i915/kernel/-/issues #11504 https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/11504 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
It's an regression in i915 driver, and I can't find a machine here in our lab to reproduce this issue. I can teach you how to bisect the kernel to identify the problematic commit, but it's time-consuming. Alternatively, you can file a bug report for Intel using the link below. https://gitlab.freedesktop.org/drm/i915/kernel/-/issues -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
Disabling "C states" in the BIOS works in my case, Idk how power consumption is affected for users who need greater battery life. (I don't use battery)... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
Affects me too in Ubuntu 22.04 updated. Linux gp-hp 6.8.0-35-generic AMD Radeon(TM) Graphic depth=32 driver=amdgpu latency=0 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
The 8350U has a Gen9 GPU: https://en.wikipedia.org/wiki/List_of_Intel_graphics_processing_units#Gen9 Blame Intel for using confusing terminology where their CPU generation number has no relationship to the GPU generation number. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
I'm running Dell Latitude 7390 with Intel UHD Graphics 620 (8350U). So 8th Gen rather than 9th. I get occasional glitching, usually on battery power and when scrolling, and always when pointer is in the bottom right of screen. I did try the kernel params listed here (i915.enable_dc=0 intel_idle.max_cstate=2, intel_idle.max_cstate=4) and this did not resolve. I have used Debian 12 and Fedora 40 on the same hardware and did not observe this. The behaviour has occurred when using Firefox (snap), VSCode (deb), Chrome (deb) and . Its not super intrusive on my hardware but it is annoying. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
@acelankao I have tried 6.10.0-061000rc2drmtip20240604-generic, still have this problem. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
No change using intel_idle.max_cstate=2 It does look like its affected by cursor position as @eugenesan noted in an earlier post. Anecdotally, and supporting the cstate argument a little, running on battery also seems to worsen the problem slightly. Still struggling to find a definitive trigger however. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
@acelankao Last mainline version I tried was 6.8.7 and at the time it was as bad as on 6.8.0-11. Unfortunately, on my hardware, bisecting/testing this bug would take unreasonable amount of time and risk running bleeding edge kernel since even with 6.8.0-35 it happens only once in 1 to 3 days. I hope someone with more "affected" hardware will be able to test latest drm-tip. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
It doesn't affect me, but currently 28 other people are saying it affects them so I'm sure someone can try that. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
Do you ever try drm-tip kernel to see if there is a fix in the upstream? https://kernel.ubuntu.com/mainline/drm-tip/ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 2062951] Re: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04)
** Summary changed: - Random flickering with Intel i915 on Linux 6.8 (Ubuntu 24.04) + Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
