DP connection swap to break eDP behavior on AMD 7735U
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
Jammy |
Won't Fix
|
Undecided
|
Unassigned | ||
Mantic |
Won't Fix
|
Undecided
|
Unassigned | ||
Noble |
Fix Released
|
Undecided
|
Unassigned | ||
linux-firmware (Ubuntu) |
Fix Released
|
Undecided
|
You-Sheng Yang | ||
Jammy |
Fix Released
|
High
|
You-Sheng Yang | ||
Mantic |
Fix Released
|
High
|
You-Sheng Yang | ||
Noble |
Fix Released
|
Undecided
|
You-Sheng Yang | ||
linux-oem-6.5 (Ubuntu) |
Invalid
|
Undecided
|
Unassigned | ||
Jammy |
Fix Released
|
Undecided
|
Unassigned | ||
Mantic |
Invalid
|
Undecided
|
Unassigned | ||
Noble |
Invalid
|
Undecided
|
Unassigned |
Bug Description
[Impact]
Some OEM platforms swap DP connections on the Rembrandt-R, which causes improper eDP behavior. The following issues will occur in these designs:
- Fn key failed to control brightness
- eDP remains black screen during S0i3 cycle
AMD has fixed these issues, but it requires both a kernel patch and an updated DMCUB microcode.
[Test Plan]
Validate brightness control works.
Validate that PSR works.
Validate that eDP works after suspend/resume.
Validate that external display works.
Run above test plan on Rembrandt or Rembrandt-R system with swapped DP as well as one without swapped DP.
[Where problems can occur]
The code and DMCUB microcode are localized to AMD Rembrandt/
[Other Info]
Patch:
https:/
Changed in linux (Ubuntu Jammy): | |
status: | New → Won't Fix |
Changed in linux (Ubuntu Mantic): | |
status: | New → Won't Fix |
Changed in linux-oem-6.5 (Ubuntu Mantic): | |
status: | New → Invalid |
Changed in linux-oem-6.5 (Ubuntu Noble): | |
status: | New → Invalid |
description: | updated |
Changed in linux-oem-6.5 (Ubuntu Jammy): | |
status: | New → Fix Committed |
Changed in linux-firmware (Ubuntu Jammy): | |
assignee: | nobody → You-Sheng Yang (vicamo) |
Changed in linux-firmware (Ubuntu Mantic): | |
assignee: | nobody → You-Sheng Yang (vicamo) |
tags: | added: verification-done-jammy |
tags: | added: verification-needed-mantic |
This bug is awaiting verification that the linux-oem- 6.5/6.5. 0-1014. 15 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!