** Description changed: - Some OEM platforms swap DP connections on the Rembrandt-R, which causes - improper eDP behavior. AMD experimented with reproducing at CRB level to - come out with a solution + [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
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. 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: New 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2049758/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
