** Package changed: linux-5.4 (Ubuntu Focal) => linux (Ubuntu Focal)
** Changed in: linux (Ubuntu Focal)
Status: In Progress => Fix Released
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This bug was fixed in the package linux-oem-osp1 - 5.0.0-1043.48
---
linux-oem-osp1 (5.0.0-1043.48) bionic; urgency=medium
* bionic/linux-oem-osp1: 5.0.0-1043.48 -proposed tracker (LP:
#1867111)
* All PS/2 ports on PS/2 Serial add-in bracket are not working after S3
(LP: #186
This bug was fixed in the package linux-oem-osp1 - 5.0.0-1043.48
---
linux-oem-osp1 (5.0.0-1043.48) bionic; urgency=medium
* bionic/linux-oem-osp1: 5.0.0-1043.48 -proposed tracker (LP:
#1867111)
* All PS/2 ports on PS/2 Serial add-in bracket are not working after S3
(LP: #186
verified fixed with proposed kernel on dell xps15 2-in-1.
Device: Mesa Intel(R) HD Graphics 630 (KBL GT2) (0x591b)
** Tags removed: verification-needed-focal
** Tags added: verification-done-focal
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This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
focal' to 'verification-done-focal'. If the problem still exists, change
the tag 'verificati
** Also affects: linux-oem-osp1 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux-oem-osp1 (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux-5.4 (Ubuntu Bionic)
Importance: Undecided
Status: New
** No longer affects: linux-5.4
On 2020-03-02 07:53:18, AceLan Kao wrote:
> Here is the test kernel and the patches I reverted/applied, could
> anyone helps me verify it.
I can confirm that the new kernel does _not_ regress brightness controls
on the machine that caused me to initially open this bug report.
Thanks!
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** Description changed:
+ [Impact]
+ After Ubuntu-5.4.0-9.12 which introduce DPCD backlight patches, the
+ backlight control on some platforms fail to work.
+ It seems using OUI string to map the panels which support DPCD
+ backlight doesn't work well, it mis-mapped thos
This kernel fixes the issue on XPS 9370 at my hand.
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Title:
[FOCAL][REGRESSION] Intel Gen 9 brightness cannot be controlled
Sta
Here is the test kernel and the patches I reverted/applied, could anyone helps
me verify it.
This kernel fixes the Dell machine I have which uses the DPCD backlight, I hope
this won't introduce regressions you've encountered.
https://people.canonical.com/~acelan/bugs/lp1861521/
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BTW, before the new patch is ready, you can add a kernel cmdline to disable the
DPCD backlight
i915.enable_dpcd_backlight=0
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T
There is a new patchset switches to use EDID-based DP quirk to list those DPCD
backlight panel.
I'll try verifying the new method and submit new SRU patches.
https://patchwork.kernel.org/cover/11376657/
** Changed in: linux-5.4 (Ubuntu Focal)
Status: Confirmed => In Progress
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FWIW I'm seeing this on a XPS 13 9370 as well
cwayne@groot:~$ glxinfo |grep Device
Device: Mesa Intel(R) UHD Graphics 620 (KBL GT2) (0x5917)
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I enabled the KMS debug messages in the drm module:
$ cat /etc/modprobe.d/drm-debug.conf
options drm debug=0x04
$ sudo update-initramfs -u -k $(uname -r) && sudo reboot
...
Unfortunately, it doesn't look like my device_id is set after the
drm_dp_read_desc() in drm_dp_read_desc:
$ dmesg | grep -i
Note that the quirks in the debug output from comment #9 are 0x
because I've got still got commit 3269788061d2 ("USUNTU: SAUCE:
drm/i915: Force DPCD backlight mode on Dell Precision 4K sku") reverted
locally.
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** Tags added: champagne
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Title:
[FOCAL][REGRESSION] Intel Gen 9 brightness cannot be controlled
Status in linux-5.4 package in
To provide further verification, I built Ubuntu-5.4-5.4.0-14.17 with a
single patch on top that reverts commit 3269788061d2 ("USUNTU: SAUCE:
drm/i915: Force DPCD backlight mode on Dell Precision 4K sku"). My
screen brightness controls are working again and I can undock from my
external monitor with
I noticed that upstream v5.4.18 allowed me to adjust my screen
brightness while Ubuntu-5.4-5.4.0-14.17 does not, which indicates an
Ubuntu SAUCE patch as the culprit. I bisected between the two kernels
and this was the result:
$ git bisect good
3269788061d24e316633165608259de1c110b801 is the first
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