Created attachment 303402 [details] dmesg - debug drm, no dc I have an HP c645 Chromebook with Ryzen 3 3250C APU. Everytime, when the FB/DRM loads and vgaconsole get's deactivated, the console freezes. I tried many common kernel parameters so far with no luck. By default it freezes back in the boot sequence, using amdgpu.dc=0 it freezes after the tty shows the login text. I attached the logs with debug drm flags, with disabling the Display Core driver, the last message is some BT device load message and right after that I found the DRM load.
please make sure CONFIG_DRM_FBDEV_EMULATION is set in your kernel config.
Hello Alex, it's set: $ zgrep DRM_FBDEV /proc/config.gz CONFIG_DRM_FBDEV_EMULATION=y CONFIG_DRM_FBDEV_OVERALLOC=100 I just got a hint to use the iommu=pt, but that one didn't work too.
It looks like this: https://www.youtube.com/watch?v=8oUUBjmo0_I
Just some more information to share here. I gave it another try, and the console freezes exactly at the moment when drm enables the kernel modesetting. [ 6.329371] [drm] amdgpu kernel modesetting enabled. With nomodesetting it works like it should, the vgaconsole remain active and useable. Do we know somebody who has some knowledge to understand the DRM logs? Otherwise these lines are pretty strange for me: [ 6.330490] amdgpu: Ignoring ACPI CRAT on non-APU system . . . [ 6.515889] [drm] failed to load ucode RLC_RESTORE_LIST_CNTL(0x28) [ 6.515892] [drm] psp gfx command LOAD_IP_FW(0x6) failed and response status is (0xFFFF300F) [ 6.516529] [drm] failed to load ucode RLC_RESTORE_LIST_GPM_MEM(0x29) [ 6.516531] [drm] psp gfx command LOAD_IP_FW(0x6) failed and response status is (0xFFFF000F) [ 6.517064] [drm] failed to load ucode RLC_RESTORE_LIST_SRM_MEM(0x2A) [ 6.517066] [drm] psp gfx command LOAD_IP_FW(0x6) failed and response status is (0xFFFF000F) . . . [ 6.549311] [drm] psp gfx command LOAD_ASD(0x4) failed and response status is (0x34) [ 6.549317] amdgpu 0000:04:00.0: amdgpu: RAS: optional ras ta ucode is not available [ 6.550582] [drm] psp gfx command LOAD_TA(0x1) failed and response status is (0x34) [ 6.551810] [drm] psp gfx command LOAD_TA(0x1) failed and response status is (0x34)
The latest 6.5.5-arch1-1 kernel just turned the display into a full white screen with high brightness.
Please repost here: https://gitlab.freedesktop.org/drm/amd/-/issues
It turned out with the latest kernel the amd_iommu=off did the trick. https://gitlab.freedesktop.org/drm/amd/-/issues/2884