[5.13 Regression] Screen blanking broken on Renoir

Upgrading the kernel from 5.12 to 5.13 breaks screen blanking on Renoir; for example, after xset dpms force off the screen turns black and occasionally flickers with garbage. Unblanking does not work (continues flickering with garbage). No issues in dmesg.

added Renoir label

possibly a duplicate of #1620 (closed)

Seeing a similar thing with 5.13.4, internal panel blanks but will not unblank. External HDMI works as normal.

Graphics:  Device-1: Advanced Micro Devices [AMD/ATI] Ellesmere [Radeon RX 470/480/570/570X/580/580X/590] vendor: ASUSTeK 
           driver: amdgpu v: kernel bus-ID: 0c:00.0 chip-ID: 1002:67df class-ID: 0300 
           Display: x11 server: X.org 1.20.12 compositor: marco v: 1.24.2 driver: loaded: amdgpu,ati unloaded: modesetting 
           alternate: fbdev,vesa

Issue exists with 5.13.5, affects only internal display.

Same here. This is very unfortunate now that 5.12 kernel series has reached EOL. So we're either stuck with a kernel series that won't receive any more (security) updates or we're forced to downgrade to latest LTS kernel series (5.10).

My issue is also present in 5.13.5 but was resolved in 5.14rc3. There are 17 drm/amd- and amdgpu-related commits that were merged on 21st and 22nd July, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/

marked this issue as a duplicate of #1620 (closed)

closed

marked this issue as related to #1620 (closed)