Ubuntu 23.04 (Lunar Lobster) has reached end of life, so this bug will
not be fixed for that specific release.
** Changed in: linux-hwe-6.5 (Ubuntu Lunar)
Status: Confirmed => Won't Fix
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The current situation is critical and does not allow using Ubuntu. It is
also impossible to lock the screen.
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Title:
[i915]
Adding the kernel parameters to the grub configuration greatly reduces
the flicker on my Dell Precision 5480 running Ubuntu 22.04. However, it
returns every few seconds after the external display has gone to
standby, despite /sys/module/i915/parameters/enable_dc and
Asus N550JV (NVIDIA GeForce GT 750M and Intel(R) HD Graphics 4600).
Flickering appears after the screen goes to sleep.
I'm using Ubuntu 22.04.4 LTS.
00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor
Integrated Graphics Controller (rev 06)
Subsystem: ASUSTeK Computer
Ubuntu 23.04 (Lunar Lobster) has reached end of life, so this bug will
not be fixed for that specific release.
** Changed in: linux (Ubuntu Lunar)
Status: Confirmed => Won't Fix
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UPDATE: I need to further check, but it seems that with X11 instead of Wayland,
the flickering disappears...
Can anybody confirm this?
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I am having the same issue with a Lenovo Thinkpad X1 Carbon Gen 10 Model
21CBCTO1WW, CPU Intel i7-1270P with an Intel Iris Xe card.
I run Ubuntu 22.04.3 LTS and tested all the available kernels, including
the latest 6.7 mainline.
I also tried all possible combinations of the grub parameters in
I am using an HP G3 450 with 6th gen i7
I have tried it all
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.enable_dc=0
intel_idle.max_cstate=2"
Kernels up to 6.6.4
It does not work, external monitor flashes like a disco.
I cannot believe this issue is years old already on the i915 gfx
uname -a
Description: Ubuntu 22.04.3 LTS
Release: 22.04
uname -a output:
Linux olive 6.2.0-36-generic #37~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Mon Oct 9
15:34:04 UTC 2 x86_64 x86_64 x86_64 GNU/Linux
I modified /etc/default/grub with
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.enable_dc=0
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux (Ubuntu Lunar)
Status: New => Confirmed
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Description:Ubuntu 22.04.3 LTS
Release:22.04
Linux LPT-037 6.2.0-34-generic #34~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC
Thu Sep 7 13:12:03 UTC 2 x86_64 x86_64 x86_64 GNU/Linux
quiet splash i915.enable_dc=0 intel_idle.max_cstate=2 does not fix the
issue in my end.
Flickering occurs in
Currently testing kernel 6.5.0-1003-oem on 5/9/2023 on 22.04 desktop
and the flickering does not occur anymore
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Title:
** Also affects: linux (Ubuntu Lunar)
Importance: Undecided
Status: New
** Also affects: linux-hwe-5.19 (Ubuntu Lunar)
Importance: Undecided
Status: New
** Also affects: linux-hwe-6.2 (Ubuntu Lunar)
Importance: Undecided
Status: New
** Changed in: linux-hwe-5.19
** Also affects: linux-hwe-6.2 (Ubuntu)
Importance: Undecided
Status: New
** Changed in: linux-hwe-6.2 (Ubuntu)
Importance: Undecided => High
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The bug has returned on kernel 6.2 series, i filed a new bug report
here:
https://bugs.launchpad.net/ubuntu/+source/linux-signed-
hwe-6.2/+bug/2028365
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This bug is closed so please open new bugs for any unresolved issues.
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Title:
[i915] Screen flickering in Ubuntu 22.04
Reposting this from bug 1970426:
This happens to my machine as well. The flickering appears to only
happens at the left-hand side of the screen or at the bottom of the
screen. I don't think I've ever seen the whole screen flicker or on
other areas of the screen except on the one I've mentioned.
Hi,
Please note that linux-hwe-5.19 has been released as the linux-generic-
hwe-22.04 variant now, so the -edge meta is not needed anymore to
install the 5.19 kernel.
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linux-hwe-5.19 (5.19.0-32) has also arrived in KDE Neon (22.04) now and
can confirm that this has fixed the issue on my Thinkpad X1. None of the
other grub modifications worked any longer, so this is great news.
Thanks all!
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Also fixed in linux-hwe-5.19 for Ubuntu 22.04 per comment #104.
So I guess you just need:
sudo apt install linux-generic-hwe-22.04-edge
** Also affects: linux-hwe-5.19 (Ubuntu)
Importance: Undecided
Status: New
** Changed in: linux-hwe-5.19 (Ubuntu)
Status: New => Fix
I report my strange experience with flickering.
I had the problem as described on Dell Inspiron 1764/Ubuntu 20.04 with
50% of occurence at boot with the screen flickering indefinitely, Linux
version 5.15.0-60-generic (buildd@lcy02-amd64-017). I suspected HW but
nevertheless tried GRUB
This bug is unresolved for 22.04 only. If that includes you then please
see comment #87.
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Title:
[i915] Screen flickering in Ubuntu
Same problem on my notebook. Added a comment to the upstream bugreport.
https://gitlab.freedesktop.org/drm/intel/-/issues/5569#note_1770025
Notebook: Medion E3223-MD62351 (MSN 30032549) (convertible with touchscreen)
CPU & GPU: Pentium Silver N5030 CPU
See upstream bugreport for details.
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Currently testing HWE-EDGE on 22.04
5.19.0-28-generic #29~22.04.1-Ubuntu
The flicker is no longer present here,
thanks to all users & devs testing this bug
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HP Envy 13 aq1176ng
i915.enable_psr=0worked for me.
Flickering stopped, flickering began by setting intel_iommu=off (to get
the slow system faster).
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This bug is closed for Ubuntu 22.10 and later so please log your own new
bugs unless you're using 22.04.
P.S. i915.enable_psr=0 is a common solution to flickering but if it
works for you then that is LAPTOP MODEL SPECIFIC and we need you to log
a bug mentioning the model details of the laptop.
My issue is that only when mouse pointer is moved to bottom portion of
screen, I see a flicker/repaint issue.
I'm on 5.19.0-23-generic (Ubuntu 22.10) and adding the said options
`i915.enable_dc=0 intel_idle.max_cstate=2` did not work.
Only adding `i915.enable_psr=0"` worked as I noted in
I've updated to the latest ubuntu 22.10 with kernel 5.19.0-23-generic and the
issue isn't fixed.
I've tried to disable psr by adding i915.enable_psr=0 and still flickering. The
only thing that solved the issue was adding nomodeset to the
GRUB_CMDLINE_LINUX_DEFAULT but now I cannot connect an
I'm having the same flickering issue with Ubuntu 18.04 image from the
dell recovery image. And I also tried Ubuntu 22.04
It worked fine before and the flickering started when I changed the motherboard.
I've tried most of the flags on the grub config but the only one that worked
was `nomodeset`
Been using 22.10 for several days on X11, enabled Wayland and have
discovered that my screen flickers and app windows fail to render
correctly. Tried the 2 GRUB parameters mentioned above - with no
success. Going back to X11 and a usable machine, hopefully this is fixed
soon - happy to try any
Having this issue on razer blade 17 pro (2021) on Ubuntu 22.10. Don't
see anything relevant in logs. It works fine most of the time but every
so often has heavy flickering for a few seconds or minutes.
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The screen flicker also happened to me after updating to 22.04. I think
the cause for the error is actually Memtest86+. When I tried to do the
fix by adding parameters to /etc/default/grub and update I got the
following.
:~$ uname -a
Linux alwayssk 5.15.0-50-generic #56-Ubuntu SMP Tue Sep 20
Because Ubuntu 22.04 is LTS (long term support), changes happen slowly.
It will get a new kernel in version 22.04.2 but that's not till February
2023.
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Why not backport this kernel version to 22.04 too?
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Title:
[i915] Screen flickering in Ubuntu 22.04 (until i915.enable_dc=0
Since kernel 5.19 is now released to Ubuntu 22.10, this bug is Fix
Released. But as mentioned in comment #87, we cannot fix Ubuntu 22.04
without further investigation done by those experiencing the bug.
** Changed in: linux (Ubuntu)
Status: Triaged => Fix Released
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Thanks a lot, didn't know about that (i self identify as a noob hence
LTS)
intel_iommu=off as temporary kernel parameter reduced flickering by just
enough for me to properly set i915.enable_dc=0 intel_idle.max_cstate=2
and now seems fixed (fingers crossed). Thanks!
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You can also add kernel parameters before Linux starts. If you tap Esc
early enough then the grub menu will appear and you can do it there.
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Thanks, my problem is that I cannot reliably edit the grub file because
the flickering is continuous. Literally, I cannot get more than half a
second to read what I'm typing. Using my mouse doesn't appear to affect
it at all. I tried to edit the first two parameters, but running sudo
update-grub
@frombeyondthegrave,
Firstly if either:
i915.enable_dc=0 intel_idle.max_cstate=2
or
intel_iommu=off
don't solve the flicker for you then you are commenting on the wrong
bug. But before opening a new bug of your own, you should also try
kernel parameter:
i915.enable_psr=0
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I updated to 22.04.1 after receiving the notification from 20.04 to do
so.
I now have continuous screen flickering, making it impossible to edit
the grub file as instructed. I tried and must have made an edit mistake
somewhere which is impossible to spot due to continuous flickering. It's
lotuspsychje,
If you need a different fix to the rest of us then it may not have been
introduced in 5.17.7 but earlier. Please try to find the earliest kernel
version that works for you, or the latest kernel version that still has
the bug. Without this information there isn't much hope of a 20.04
@ Daniel #85
just tested linux-image-5.15.0-41-generic and linux-
image-5.15.0-43-generic
wich both still result in flickering indeed,
5.15.0-40 i tested before in #73
back to 5.17.7-051707-generic #202205121146 to fix
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Based on comment #78, I expect the main task at the top of this bug
should close when kernel 5.19 is (soon) released to Ubuntu 22.10.
Assuming there's no regression in 5.19.
I don't know if or when such a fix will ever reach Ubuntu 22.04 because
we really thought it was the same fix at play in
@ Daniel #83 thank you!
the last kernel version i tested was 5.15.0-40-generic
please let me know wich kernel version to test next that will inclde the
fix
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Well it's fixed for the majority of people in kernel 5.15.0-40 but I had
forgotten that doesn't include the OP (comment #73).
** Changed in: linux (Ubuntu Jammy)
Status: Fix Released => Triaged
** No longer affects: linux (Ubuntu Jammy)
** No longer affects: linux (Ubuntu Kinetic)
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I'm unsure if this is really fixed in Jammy
I'm seeing flickering with 5.15.0-41 as well which seems to improve with
i915.enable_dc=0 intel_idle.max_cstate=2
cat /proc/cmdline
BOOT_IMAGE=/vmlinuz-5.15.0-41-generic root=/dev/mapper/vgubuntu-root ro quiet
splash i915.enable_dc=0
** Also affects: linux (Ubuntu Jammy)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Kinetic)
Importance: High
Status: Confirmed
** Changed in: linux (Ubuntu Jammy)
Status: New => Fix Released
** Changed in: linux (Ubuntu Kinetic)
Status:
Every time a bug like this is reported, we ask the user to try
i915.enable_psr=0 early on to exclude that possibility.
If anyone has an issue that is not described by the title of this page
then it should be discussed in a separate bug report.
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I think there are potentially 4 different bugs that all result in forms
of "flickering" on Intel graphics:
- One related to panel self-refresh (i915.enable_psr), this one has been around
for a while, predates 22.04. I think it even predates 20.04
- "Kaleidoscope patterns" flickering, apparently
I'm using 5.15.0-39-lowlatency and "intel_iommu=off" has solved the flickering
problem. I was having the same issue as Anaggh showed on the first video in his
comment above.
Still have "i915.enable_dc=0 intel_idle.max_cstate=2" for now too (but that on
it's own didn't help before).
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@ Daniel
i think we got 2 bugs mixed up here
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Title:
[i915] Screen flickering in Ubuntu 22.04 (until i915.enable_dc=0
+1 confirm.
Adding "intel_iommu=off" to grub fixes the flickering for me!
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Title:
[i915] Screen flickering in Ubuntu 22.04 (until
+1 Confirm.
Adding "intel_iommu=off" to grub fixes the problem.
Tested on
* 5.17.6-051706-generic #202205090841 SMP PREEMPT Mon May 9 08:51:54 UTC 2022
x86_64 GNU/Linux
* 5.15.0-39-generic #42-Ubuntu SMP Thu Jun 9 23:42:32 UTC 2022 x86_64 GNU/Linux
Like Tushar, the flickers I experienced are
I have been facing the "flickering occurs at some specific cursor positions and
does not stop until the cursor moves" issue.
Now I have tried with `intel_iommu=off`, using the `Linux 5.15.0-39-generic
#42-Ubuntu SMP Thu Jun 9 23:42:32 UTC 2022` kernel (latest 22.04 HWE).
Can no longer reproduce
@Tushar: That bug is marked as a duplicate if this bug though. Perhaps
it shouldn't be?
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Title:
[i915] Screen flickering in Ubuntu
@lotuspsychje, does upgrading to kernel 5.17.7 stop flickering for you?
Because there may be two different bugs here. My error looks more like
bug #1970426: Flickering occurs at some specific cursor positions and
does not stop until the cursor moves to another point.
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@ #55 and #57
i tested intel_iommu=off on kernel 5.15.0-39-generic ( 22.04) wich still
results in flickering
back to i915.enable_dc=0 intel_idle.max_cstate=2 for me
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Adding "intel_iommu=off" to grub fixes this problem on affected kernels.
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Title:
[i915] Screen flickering in Ubuntu 22.04 (until
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Title:
[i915] Screen flickering in Ubuntu 22.04 (until i915.enable_dc=0
intel_idle.max_cstate=2 are added) (fixed in 5.17.7 and
There actually aren't any changes in the i915 driver between 5.17.6 and
5.17.7. But there are changes to iommu code... Please try this with one
of the failing kernel versions:
intel_iommu=off
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** Summary changed:
- [i915] Screen flickering in Ubuntu 22.04 (until i915.enable_dc=0
intel_idle.max_cstate=2 are added)
+ [i915] Screen flickering in Ubuntu 22.04 (until i915.enable_dc=0
intel_idle.max_cstate=2 are added) (fixed in 5.17.7 and later)
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> The bug exists on 5.15.35, 5.16.20, 5.17.5, 5.15.36. In addition to this, the
> bug exists on 5.15.37 and 5.17.6.
I have been using 5.17.7 for around 16 hours, and the problem has not occurred
so far.
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> The bug exists on 5.15.35, 5.16.20, 5.17.5, 5.15.36.
Then the range to search is between 5.17.5 (failing) and 5.18.2
(working). We need to find adjacent version numbers where one is failing
and the next is working.
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Are kernels from https://kernel.ubuntu.com/~kernel-ppa/mainline/ safe to
try, as in, will I be able to boot afterwards if I have an LVM2 (LUKS?)
encrypted root (Set up using the Ubuntu installer)?
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The bug exists on 5.15.35, 5.16.20, 5.17.5, 5.15.36.
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Title:
[i915] Screen flickering in Ubuntu 22.04 (until i915.enable_dc=0
5.15.0-37.39 actually is not based on 5.15.0 but 5.15.35 according to
its source code. Weird naming I know...
Maybe start on 5.15.35 in https://kernel.ubuntu.com/~kernel-
ppa/mainline/?C=M;O=D, verify the bug exists there, and then try 5.16/
and 5.17/
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Daniel, I faced this problem on the last Ubuntu kernel version 5.15.0.37.39.
I have been using the immediate-next mainline kernel version
5.15.1-051501.202111061036 for two days, and the problem did not occur so far.
Can anybody confirm this?
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To find a fix that can be released in updates to 22.04 we will need to
start by identifying what the last kernel version with the bug was, and
the first kernel version with the fix.
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Installing the 5.18.2 kernel eliminates the problem, but my laptop is
overheating with no applications running.
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Title:
[i915]
I can confirm that 5.18.13 kernel has no flickers and no GRUB workaround
is needed.
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Title:
[i915] Screen flickering in Ubuntu
Thanks for confirming! This is great news.
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Title:
[i915] Screen flickering in Ubuntu 22.04 (until i915.enable_dc=0
I've installed 5.18.2 from the mainline ppa yesterday and have been
running it without i915.enable_dc=0 intel_idle.max_cstate=2 since then.
No flickering so far.
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Hi, following up on this
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1958191/comments/26
I installed 5.18.2 today using mainline
https://github.com/bkw777/mainline
$ uname -a
Linux home 5.18.2-051802-generic #202206060740 SMP PREEMPT_DYNAMIC Mon Jun 6
07:46:45 UTC 2022 x86_64 x86_64
I have the same problem on an Lenovo X260, i7-6500U. Using the
"i915.enable_dc=0 intel_idle.max_cstate=2" workaround has made the
system more stable.
This mostly seems to occur when playing a game in the browser (chrome &
firefox), e.g. chess.com.
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Same issue here. Heavy black flickering on the screen with Ubuntu 22.04
after upgrade from 20.04 and after a clean install. No extra repos, only
default packages.
Aspire 3 A315-31 series
N17Q2
Mesa Intel® HD Graphics 500 (APL 2)
Linux laptop 5.15.0-33-generic #34-Ubuntu SMP Wed May 18
Reported a new bug here:
https://bugs.launchpad.net/ubuntu/+source/linux-signed-lowlatency/+bug/1976398
as in my case adding extra option to GRUB didn't help.
Please follow there if you are also affected.
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Peter, I don't think it's a fix, but only a workaround that limits two
important power management functionalities (cpu cstates and gpu display
cstates). I hope and believe they're still working on finding a real fix
for the bug.
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Shouldn't an update be released that adds the workaround(s) mentioned
above (the Kernel boot parameters i915.enable_dc=0 or/and, if necessary,
intel_idle.max_cstate=$MAX_CSTATE_THAT_WORKS)?
So the Ubuntu 22.04 experience is improved for users with Intel graphics
while the kernel regression is
If the suggested solution doesn't work for you then please open a
separate new bug by running:
ubuntu-bug linux
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Title:
[i915]
adding "i915.enable_dc=0 intel_idle.max_cstate=2" doesn't help in my
case (kernel 5.15, Intel UHD / i915 graphics)
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Title:
[i915]
Having the same issue on a Lenovo T480s laptop.
Linux JP 5.15.0-30-generic #31-Ubuntu SMP Thu May 5 10:00:34 UTC 2022
x86_64 x86_64 x86_64 GNU/Linux
*-display
description: VGA compatible controller
product: UHD Graphics 620
vendor: Intel Corporation
I also experience flickering with Ubuntu 22.04's 5.15.0-27-generic
kernel, which goes away with i915.enable_dc=0 intel_idle.max_cstate=2,
and was not present with Ubuntu 20.04's latest 5.13 kernel.
Due to another bug affecting my machine, I'm now running the vanilla
5.14.20 kernel from the
done in Bug #1973676
Thanks Daniel
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Title:
[i915] Screen flickering in Ubuntu 22.04 (until i915.enable_dc=0
David, please open a new bug for the above.
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Title:
[i915] Screen flickering in Ubuntu 22.04 (until i915.enable_dc=0
Half-related to this bug but worth mentioning it because it is certainly
linked to it. On a HP x360 Spectre (i7-8565U WhiskeyLake-U GT2 [UHD
Graphics 620]), the trick with GRUB_CMDLINE_LINUX_DEFAULT.
The problem is more serious here because the screen flickers and goes to
black, purple, green,
The monitor going black is a different bug. Please don't discuss that
here, but open a new bug by running:
ubuntu-bug linux
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Updated ubuntu from 21.04 and no matter what I do with settings, all
monitors go black every 30 seconds I do not touch the keyboard or mouse
(or running movie). I hope it will be fixed soon.
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I just updated my Ubuntu to 22.04 and I'm having the same issue.
Hopefully it'll get fixed ASAP.
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Title:
[i915] Screen flickering
Hi, following up on this -
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1970426/comments/9
GRUB PARAM - `i915.enable_dc=0 intel_idle.max_cstate=2` has fixed the
flicker for me.
$ uname -a
Linux home 5.15.0-30-generic #31-Ubuntu SMP Thu May 5 10:00:34 UTC 2022 x86_64
x86_64 x86_64
Following up on this:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1958191/comments/16
Booting with 5.15.0-25-generic and the i915.enable_dc=0
intel_idle.max_cstate=2 configs seems to fix the issue on my hardware.
5.15.0-27-generic won't stop shaking randomly no matter what value I
test
@lotuspsychje : I think it would be useful to detect a behaviour change,
even if symptoms are slight different (eventually it can still help for
bug 1948778 if there are two different bugs).
@kjur : kernel series from https://kernel.ubuntu.com/~kernel-
ppa/mainline/?C=N;O=A are vanilla kernels,
@Oibaf (oibaf) - I experienced the same issue on Xubuntu 22.04 too. The very
last available xubuntu 21.10 kernel was fine. I upgraded from fully updated
21.10 to 22.40 and then the problem started.
Not sure what is the latest 21.10 available kernel. Perhaps 5.13.0.1022.23 ?
Not sure how to do a
I can confirm that adding `i915.enable_dc=0 intel_idle.max_cstate=2`
works for me on i7-7600u. No more screen flickering in the last two
days. Without the workaround the flickering occurs randomly and
definitively in correlation to mouse movement, but I'm not sure how
exactly. As already stated by
@ Oibaf #19
If it can help, i start helping debug ubuntu 22.04 from the start
with kernel 5.13.0-19.19-generic with light flickering (workable)
see bug https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1948778
and heavy unworkable flickering started (in this bug) with kernel series
When I upgraded to 22.04 I started getting flicker on my external HDMI monitor.
Latitude 7300, i7-8665U.
A batch of flicker every 15 or 30 minutes or so, not very easy to use for
bisecting...
There are instances of
[336186.058517] i915 :00:02.0: [drm] *ERROR* CPU pipe B FIFO underrun
in dmesg
Daniel van Vugt (vanvugt) asked for a kernel bisect with the kernel mainline
PPA:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1970426/comments/22
If someone is willing to do it he can do this (from
https://wiki.ubuntu.com/Kernel/KernelBisection#Version_bisecting_upstream_kernels):
The
I'm not using wayland. I stated that I was on X11.
I did sudo update-grub indeed!
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https://bugs.launchpad.net/bugs/1958191
Title:
[i915] Screen flickering in Ubuntu 22.04
@ Diogo #16
did you also sudo update-grub after the kernel paramater?
and doublechecked if you are using your intel card and not your nvidia on
wayland?
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I'm having the same issue, I'd like to add that I've tested both Xubuntu
22.04 and Ubuntu 22.04 and was able to reproduce the same error. Now I'm
running Kubuntu 22.04 with the following spec:
OS: Kubuntu 22.04 LTS x86_64
Kernel: 5.15.0-27-generic
Shell: bash 5.1.16
Resolution: 1920x1080 @
** Summary changed:
- [i915] Flickering and deformed booting into desktop both on wayland/xorg
+ [i915] Screen flickering in Ubuntu 22.04 (until i915.enable_dc=0
intel_idle.max_cstate=2 are added)
** Tags added: regression-release rls-jj-incoming
** Changed in: linux (Ubuntu)
Status:
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