This bug was fixed in the package linux-oem-5.17 - 5.17.0-1018.19
---------------
linux-oem-5.17 (5.17.0-1018.19) jammy; urgency=medium
* jammy/linux-oem-5.17: 5.17.0-1018.19 -proposed tracker (LP:
#1990350)
* intel_pmc_core not load on Raptor Lake (LP: #1988461)
- platform/x86/intel: pmc: Support Intel Raptorlake P
- SAUCE: platform/x86/intel: pmc/core: Add Raptor Lake support to pmc core
driver
* Fix RPL-S support on powercap/intel_rapl (LP: #1990161)
- x86/cpu: Add new Raptor Lake CPU model number
- powercap: intel_rapl: Add support for RAPTORLAKE_P
- powercap: intel_rapl: Add support for RAPTORLAKE_S
* Add HDMI codec ID for Intel Raptor Lake (LP: #1989578)
- ALSA: hda: Add PCI and HDMI IDs for Intel Raptor Lake
* Fix blank screen on Thinkpad ADL 4K+ panel (LP: #1980621)
- SAUCE: drm/i915: Implement WaEdpLinkRateDataReload
-- Timo Aaltonen <timo.aalto...@canonical.com> Wed, 21 Sep 2022
11:24:32 +0300
** Changed in: linux-oem-5.17 (Ubuntu Jammy)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1980621
Title:
Fix blank screen on Thinkpad ADL 4K+ panel
Status in HWE Next:
In Progress
Status in linux package in Ubuntu:
In Progress
Status in linux-oem-5.14 package in Ubuntu:
Invalid
Status in linux-oem-5.17 package in Ubuntu:
Invalid
Status in linux-oem-5.14 source package in Focal:
Won't Fix
Status in linux source package in Jammy:
In Progress
Status in linux-oem-5.17 source package in Jammy:
Fix Released
Status in linux source package in Kinetic:
In Progress
Bug description:
[Impact]
Set screen off on ThinkPad P1G5 with 4k+ panel.
The screen will never be back.
[Fix]
It's a upstream kernel regression.
And reverted by upstream.
[Test]
Verified on hardware, screen on/off 20 times OK.
[Where problems could occur]
Low risk, it reverts a regression and may break i915 driver.
On 5.14-oem and Jammy kernel, This commit was claimed to backport
commit 73867c8709b5 ("drm/i915/display: Remove check for low voltage sku for
max dp source rate")
But it's not kind of it.
So revert it instead.
On 5.17 kernel, revert it by upstream commit.
Unstable kernel already got it.
V2:
[Impact]
Set screen off on ThinkPad P1G5 with 4k+ panel.
The screen will never be back.
[Fix]
Reload link rate as WA to fix the issue.
[Test]
Verified on hardware, screen on/off 20 times OK.
[Where problems could occur]
It may break DP output on Intel platform.
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