ACK: [PATCH 0/1][SRU][M][N] System hang after unplug/plug DP monitor with AMD W7500 card

[Thibault Ferrante]

On 16-11-2023 06:26, AceLan Kao wrote:
> From: "Chia-Lin Kao (AceLan)" <acelan.kao at canonical.com>
> 
> BugLink: https://bugs.launchpad.net/bugs/2042912
> 
> [Impact]
> System hangs and no external output after unplug/plug DP monitor. (AMD Radeon Pro W7500)
> Observed a bunch of [Hardware Error] messages and finally amdgpu crashed.
> 
> [Fix]
> AMD provides a patch to fix the issue
> https://www.spinics.net/lists/amd-gfx/msg99737.html
> 
> which is included in v6.7-rc1
> 7f3e6b840fa8 drm/amd/pm: Fix error of MACO flag setting code
> 
> [Testcase]
> 1. Connect the DUT to an external DP monitor via one of the ports on the AMD graphics card
> 2. Boot into Ubuntu
> 3. Unplug the DP cable from the DUT
> 4. Wait for 30 seconds
> 5. Replug in the DP cable
> 6. Make sure the system doesn't hang and the external DP monitor works
> 
> [Where probles could occur]
> The patch make sure MACO is supported only if BACO is supported. It creates
> a stricter rule for MACO to avoid MACO is enabled with BACO supports. It
> should be safe to apply stricter rules to enable features.
> 
> Ma Jun (1):
>    drm/amd/pm: Fix error of MACO flag setting code
> 
>   drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c | 8 ++++----
>   drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c | 9 +++++----
>   2 files changed, 9 insertions(+), 8 deletions(-)
> 

Acked-by: Thibault Ferrante <thibault.ferrante at canonical.com>

--
Thibault