jammy-oem-6.5: one more panel needs to disable psr2
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
HWE Next |
New
|
Undecided
|
Unassigned | ||
linux (Ubuntu) |
Triaged
|
High
|
Hui Wang | ||
Jammy |
Invalid
|
Undecided
|
Unassigned | ||
Noble |
Triaged
|
High
|
Hui Wang | ||
linux-oem-6.5 (Ubuntu) |
Invalid
|
High
|
Hui Wang | ||
Jammy |
Fix Released
|
High
|
Hui Wang | ||
Noble |
Invalid
|
High
|
Hui Wang |
Bug Description
BugLink: https:/
[Impact]
The customer Dell provide the edid for one more panel, this panel also needs to disable the psr2, otherwise the display will not work correctly
This PR is just a workaround, the upstream bug is here: https:/
After the upstream fix this bug with a real fix, I will revert the workaround and backport the real fix to Noble and Jammy oem-kernel.
[Fix]
There is no real fix so far, ODM recommends to use a workaround to disable PSR2, this is a temp solution, after we get the real fix, we could revert the temp workaround.
[Test case]
booting with the patched kernel, If the pannel's edid is in the qurik list, the PSR2 will be disabled (checking /sys/kernel/
[Where problems could occur]
It is possible that the temp solution couldn't work, then the screen will still show garbage and the screen is flicking, another possible regression is the screen has no problem before, but after running patched kernel, the PSR2 is disabled and the system cost more power, but this possibility is very low, I tested the patched on some dell machines, all worked well.
Changed in linux-oem-6.5 (Ubuntu Jammy): | |
assignee: | nobody → Hui Wang (hui.wang) |
Changed in linux-oem-6.5 (Ubuntu): | |
importance: | Undecided → High |
Changed in linux-oem-6.5 (Ubuntu Jammy): | |
importance: | Undecided → High |
Changed in linux-oem-6.5 (Ubuntu): | |
status: | New → Invalid |
Changed in linux-oem-6.5 (Ubuntu Jammy): | |
status: | New → In Progress |
tags: | added: originate-from-2045640 |
description: | updated |
tags: | added: somerville |
summary: |
- jammy-oem-6.5: one more pannel needs to disable psr2 + jammy-oem-6.5: one more panel needs to disable psr2 |
Changed in linux (Ubuntu Jammy): | |
status: | New → Invalid |
Changed in linux-oem-6.5 (Ubuntu Noble): | |
status: | Invalid → Triaged |
Changed in linux (Ubuntu Noble): | |
status: | New → Triaged |
Changed in linux-oem-6.5 (Ubuntu Noble): | |
status: | Triaged → New |
Changed in linux (Ubuntu Noble): | |
assignee: | nobody → Hui Wang (hui.wang) |
importance: | Undecided → High |
description: | updated |
Changed in linux-oem-6.5 (Ubuntu Noble): | |
status: | New → Invalid |
Changed in linux-oem-6.5 (Ubuntu Jammy): | |
status: | In Progress → Fix Committed |
This bug is awaiting verification that the linux-oem- 6.5/6.5. 0-1011. 12 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- jammy-linux- oem-6.5' to 'verification- done-jammy- linux-oem- 6.5'. If the problem still exists, change the tag 'verification- needed- jammy-linux- oem-6.5' to 'verification- failed- jammy-linux- oem-6.5' .
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.
See https:/ /wiki.ubuntu. com/Testing/ EnableProposed for documentation how to enable and use -proposed. Thank you!