** Changed in: linux-firmware (Ubuntu Jammy)
Assignee: (unassigned) => You-Sheng Yang (vicamo)
** Changed in: linux-firmware (Ubuntu Mantic)
Assignee: (unassigned) => You-Sheng Yang (vicamo)
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https://bugs.launchpad.net/bugs/2049758
Title:
DP connection swap to break eDP behavior on AMD 7735U
Status in linux package in Ubuntu:
New
Status in linux-firmware package in Ubuntu:
New
Status in linux-oem-6.5 package in Ubuntu:
Invalid
Status in linux source package in Jammy:
Won't Fix
Status in linux-firmware source package in Jammy:
New
Status in linux-oem-6.5 source package in Jammy:
Fix Committed
Status in linux source package in Mantic:
Won't Fix
Status in linux-firmware source package in Mantic:
New
Status in linux-oem-6.5 source package in Mantic:
Invalid
Status in linux source package in Noble:
New
Status in linux-firmware source package in Noble:
New
Status in linux-oem-6.5 source package in Noble:
Invalid
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/Rembrandt-R
systems. Issues would occur specifically on these designs, which is why they
should be tested.
[Other Info]
Patch:
https://github.com/torvalds/linux/commit/b17ef04bf3a4346d66404454d6a646343ddc9749
DMCUB FW:
https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/commit/?id=2909bf41a051601e86129a9c2fcebf31c15eebc8
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