Now I'm just guessing.
TBH, I've no idea what's causing this reproducible 'purple' background with
`amdgpu` on Ryzen 5XXXG.
All I can definitively say is that it's real, reproducible, seen elsewhere in
the wild for radeon/amd
Possibly related to driver defaulting to HDMI YCbCr color, rather than RGB.
I'll add more info as requested when someone with better knowledge of what's
needed chimes in.
For now, here's the last bits of info I've found.
This issue
https://community.amd.com/t5/drivers-software/purple-ish-desktop-screen-after-clean-installing-the-newest-19-5/td-p/99933/page/15
suggests in 2019, Microsoft fixed driver for this purple-hue issue on Ryzen
https://support.microsoft.com/en-ca/help/4505903/windows-10-update-kb4505903
Seems like this had to do with the driver selecting YCbCr for HDMI rather than
RGB ...
Here,
Setting the amdgpu HDMI Pixel Format on Linux
https://www.wezm.net/v2/posts/2020/linux-amdgpu-pixel-format/
mentions
"...
I looked for a way to change the pixel format output from the HDMI port
of my RX560 graphics card. Turns out this is super easy on Windows, but the
amdgpu driver on Linux does not support changing it.
..."
and refers to an EDID hack/fix
https://www.wezm.net/v2/posts/2020/linux-amdgpu-pixel-format/#the-fix
More digging led to
AMDGPU fails to properly parse EDID information from display, causing
weird resolution setting issues
https://gitlab.freedesktop.org/drm/amd/-/issues/1589
with a familiar 'purple' display,
https://gitlab.freedesktop.org/drm/amd/uploads/2e2b485aed26d77a9066ca9ea516d49d/image.png
and points to an amd issue "Created 3 years ago",
no color format choice in amdgpu
https://gitlab.freedesktop.org/drm/amd/-/issues/476#note_852860
and finally, a patch
[PATCH] drm/amdgpu/dc: Pixel encoding DRM property and module parameter
https://www.spinics.net/lists/amd-gfx/msg53281.html
which suggests adding
pixel_encoding=rgb
checking
hwinfo --gfxcard | egrep "Model|SysFS ID"
SysFS ID: /devices/pci0000:00/0000:00:08.1/0000:30:00.0
Model: "ATI VGA compatible controller"
SysFS ID: /devices/pci0000:00/0000:00:01.1/0000:10:00.0
Model: "nVidia GP108 [GeForce GT 1030]"
ls -ald /sys/class/drm/card* | grep 30:
lrwxrwxrwx 1 root root 0 Oct 30 09:56 /sys/class/drm/card0 ->
../../devices/pci0000:00/0000:00:08.1/0000:30:00.0/drm/card0/
lrwxrwxrwx 1 root root 0 Oct 30 09:56 /sys/class/drm/card0-DP-1
-> ../../devices/pci0000:00/0000:00:08.1/0000:30:00.0/drm/card0/card0-DP-1/
lrwxrwxrwx 1 root root 0 Oct 30 09:56
/sys/class/drm/card0-HDMI-A-1 ->
../../devices/pci0000:00/0000:00:08.1/0000:30:00.0/drm/card0/card0-HDMI-A-1/
lrwxrwxrwx 1 root root 0 Oct 30 09:56
/sys/class/drm/card0-HDMI-A-2 ->
../../devices/pci0000:00/0000:00:08.1/0000:30:00.0/drm/card0/card0-HDMI-A-2/
( why are there *2* HDMI for card0, when only 1 phy output? )
next, added to kernel cmdline
video=HDMI-A-1:2560x1440@60:pixel_encoding=rgb
video=HDMI-A-2:2560x1440@60:pixel_encoding=rgb
and, for good measure,
cat /etc/modprobe.d/amdgpu.conf
re-gen'd initrd, and rebooted.
STILL getting the purple screen :-/
dmesg, after boot completion,
dmesg | grep encod
...
[ 1.650090] amdgpu: unknown parameter 'pixel_encoding' ignored
...
Paying close(r) attention, screen output after grub-select starts out with
black-as-usual background, but switches to purple immediately after:
dmesg
...
[ 1.268709] systemd[1]: Starting dracut initqueue hook...
...
where,
dmesg | egrep -i "atpx|vga|drm|amdgpu|initqueue"
[ 0.329804] ACPI BIOS Error (bug): Failure creating named
object [\_SB.PCI0.GPP0.VGA], AE_ALREADY_EXISTS (20210604/dswload2-326)
[ 0.351328] pci 0000:10:00.0: vgaarb: VGA device added:
decodes=io+mem,owns=none,locks=none
[ 0.351328] pci 0000:30:00.0: vgaarb: setting as boot VGA
device
[ 0.351328] pci 0000:30:00.0: vgaarb: VGA device added:
decodes=io+mem,owns=io+mem,locks=none
[ 0.351328] pci 0000:10:00.0: vgaarb: bridge control possible
[ 0.351328] pci 0000:30:00.0: vgaarb: bridge control possible
[ 0.351328] vgaarb: loaded
[ 0.410851] fb0: EFI VGA frame buffer device
[ 1.264753] ACPI: video: Video Device [VGA] (multi-head: yes
rom: no post: no)
[ 1.265256] ACPI: video: Video Device [VGA1] (multi-head:
yes rom: no post: no)
[ 1.268709] systemd[1]: Starting dracut initqueue hook...
[ 1.650090] amdgpu: unknown parameter 'pixel_encoding'
ignored
[ 1.650094] amdgpu: unknown parameter 'modeset' ignored
[ 1.650416] [drm] amdgpu kernel modesetting enabled.
[ 1.650432] vga_switcheroo: detected switching method
\_SB_.PCI0.GP17.VGA_.ATPX handle
[ 1.650720] ATPX version 1, functions 0x00000001
[ 1.650751] ATPX Hybrid Graphics
[ 1.656232] amdgpu: Virtual CRAT table created for CPU
[ 1.656240] amdgpu: Topology: Add CPU node
[ 1.656299] fb0: switching to amdgpudrmfb from EFI VGA
[ 1.656413] amdgpu 0000:30:00.0: vgaarb: deactivate vga
console
[ 1.656503] [drm] initializing kernel modesetting (RENOIR
0x1002:0x1638 0x1002:0x1636 0xC9).
[ 1.656516] amdgpu 0000:30:00.0: amdgpu: Trusted Memory Zone
(TMZ) feature enabled
[ 1.656548] [drm] register mmio base: 0xFCB00000
[ 1.656548] [drm] register mmio size: 524288
[ 1.656550] [drm] PCIE atomic ops is not supported
[ 1.657578] [drm] add ip block number 0 <soc15_common>
[ 1.657579] [drm] add ip block number 1 <gmc_v9_0>
[ 1.657581] [drm] add ip block number 2 <vega10_ih>
[ 1.657581] [drm] add ip block number 3 <psp>
[ 1.657582] [drm] add ip block number 4 <smu>
[ 1.657583] [drm] add ip block number 5 <gfx_v9_0>
[ 1.657584] [drm] add ip block number 6 <sdma_v4_0>
[ 1.657585] [drm] add ip block number 7 <dm>
[ 1.657586] [drm] add ip block number 8 <vcn_v2_0>
[ 1.657587] [drm] add ip block number 9 <jpeg_v2_0>
[ 1.663332] [drm] BIOS signature incorrect 0 0
[ 1.663360] amdgpu 0000:30:00.0: amdgpu: Fetched VBIOS from
ROM BAR
[ 1.663363] amdgpu: ATOM BIOS: 113-CEZANNE-018
[ 1.664115] [drm] VCN decode is enabled in VM mode
[ 1.664117] [drm] VCN encode is enabled in VM mode
[ 1.664118] [drm] JPEG decode is enabled in VM mode
[ 1.664147] [drm] vm size is 262144 GB, 4 levels, block size
is 9-bit, fragment size is 9-bit
[ 1.664153] amdgpu 0000:30:00.0: amdgpu: VRAM: 512M
0x000000F400000000 - 0x000000F41FFFFFFF (512M used)
[ 1.664155] amdgpu 0000:30:00.0: amdgpu: GART: 1024M
0x0000000000000000 - 0x000000003FFFFFFF
[ 1.664156] amdgpu 0000:30:00.0: amdgpu: AGP: 267419648M
0x000000F800000000 - 0x0000FFFFFFFFFFFF
[ 1.664161] [drm] Detected VRAM RAM=512M, BAR=512M
[ 1.664162] [drm] RAM width 128bits DDR4
[ 1.664200] [drm] amdgpu: 512M of VRAM memory ready
[ 1.664201] [drm] amdgpu: 3072M of GTT memory ready.
[ 1.664206] [drm] GART: num cpu pages 262144, num gpu pages
262144
[ 1.664285] [drm] PCIE GART of 1024M enabled.
[ 1.664286] [drm] PTB located at 0x000000F400900000
[ 1.668403] amdgpu 0000:30:00.0: amdgpu: PSP runtime
database doesn't exist
[ 1.684148] [drm] Loading DMUB firmware via PSP:
version=0x01010019
[ 1.699355] [drm] Found VCN firmware Version ENC: 1.14 DEC:
5 VEP: 0 Revision: 20
[ 1.699368] amdgpu 0000:30:00.0: amdgpu: Will use PSP to
load VCN firmware
[ 2.119364] nvidia 0000:10:00.0: vgaarb: changed VGA
decodes: olddecodes=io+mem,decodes=none:owns=none
[ 2.371596] [drm] [nvidia-drm] [GPU ID 0x00001000] Loading
driver
[ 2.425174] [drm] reserve 0x400000 from 0xf41f800000 for PSP
TMR
[ 2.506778] amdgpu 0000:30:00.0: amdgpu: RAS: optional ras
ta ucode is not available
[ 2.515189] amdgpu 0000:30:00.0: amdgpu: RAP: optional rap
ta ucode is not available
[ 2.515191] amdgpu 0000:30:00.0: amdgpu: SECUREDISPLAY:
securedisplay ta ucode is not available
[ 2.515540] amdgpu 0000:30:00.0: amdgpu: SMU is initialized
successfully!
[ 2.516855] [drm] kiq ring mec 2 pipe 1 q 0
[ 2.517561] [drm] Display Core initialized with v3.2.141!
[ 2.517981] [drm] DMUB hardware initialized:
version=0x01010019
[ 2.577117] [drm] VCN decode and encode initialized
successfully(under DPG Mode).
[ 2.577132] [drm] JPEG decode initialized successfully.
[ 2.578072] kfd kfd: amdgpu: Allocated 3969056 bytes on gart
[ 2.707339] amdgpu: HMM registered 512MB device memory
[ 2.707361] amdgpu: SRAT table not found
[ 2.707361] amdgpu: Virtual CRAT table created for GPU
[ 2.708098] amdgpu: Topology: Add dGPU node [0x1638:0x1002]
[ 2.708103] kfd kfd: amdgpu: added device 1002:1638
[ 2.708170] amdgpu 0000:30:00.0: amdgpu: SE 1, SH per SE 2,
CU per SH 18, active_cu_number 27
[ 2.709057] [drm] fb mappable at 0x90CD2000
[ 2.709059] [drm] vram apper at 0x90000000
[ 2.709059] [drm] size 14745600
[ 2.709059] [drm] fb depth is 24
[ 2.709060] [drm] pitch is 10240
[ 2.896150] fbcon: amdgpu (fb0) is primary device
[ 3.000331] amdgpu 0000:30:00.0: [drm] fb0: amdgpu frame
buffer device
[ 3.009001] amdgpu 0000:30:00.0: amdgpu: ring gfx uses VM
inv eng 0 on hub 0
[ 3.009004] amdgpu 0000:30:00.0: amdgpu: ring comp_1.0.0
uses VM inv eng 1 on hub 0
[ 3.009006] amdgpu 0000:30:00.0: amdgpu: ring comp_1.1.0
uses VM inv eng 4 on hub 0
[ 3.009006] amdgpu 0000:30:00.0: amdgpu: ring comp_1.2.0
uses VM inv eng 5 on hub 0
[ 3.009007] amdgpu 0000:30:00.0: amdgpu: ring comp_1.3.0
uses VM inv eng 6 on hub 0
[ 3.009008] amdgpu 0000:30:00.0: amdgpu: ring comp_1.0.1
uses VM inv eng 7 on hub 0
[ 3.009009] amdgpu 0000:30:00.0: amdgpu: ring comp_1.1.1
uses VM inv eng 8 on hub 0
[ 3.009010] amdgpu 0000:30:00.0: amdgpu: ring comp_1.2.1
uses VM inv eng 9 on hub 0
[ 3.009010] amdgpu 0000:30:00.0: amdgpu: ring comp_1.3.1
uses VM inv eng 10 on hub 0
[ 3.009011] amdgpu 0000:30:00.0: amdgpu: ring kiq_2.1.0 uses
VM inv eng 11 on hub 0
[ 3.009012] amdgpu 0000:30:00.0: amdgpu: ring sdma0 uses VM
inv eng 0 on hub 1
[ 3.009013] amdgpu 0000:30:00.0: amdgpu: ring vcn_dec uses
VM inv eng 1 on hub 1
[ 3.009014] amdgpu 0000:30:00.0: amdgpu: ring vcn_enc0 uses
VM inv eng 4 on hub 1
[ 3.009015] amdgpu 0000:30:00.0: amdgpu: ring vcn_enc1 uses
VM inv eng 5 on hub 1
[ 3.009016] amdgpu 0000:30:00.0: amdgpu: ring jpeg_dec uses
VM inv eng 6 on hub 1
[ 3.155840] [drm] Initialized nvidia-drm 0.0.0 20160202 for
0000:10:00.0 on minor 1
[ 3.156216] [drm] Initialized amdgpu 3.42.0 20150101 for
0000:30:00.0 on minor 0
[ 4.598742] systemd[1]: Finished dracut initqueue hook.
[ 5.043799] systemd[1]: dracut-initqueue.service:
Deactivated successfully.
[ 5.043873] systemd[1]: Stopped dracut initqueue hook.
[ 10.007951] systemd[1]: Starting Load Kernel Module drm...
[ 10.170619] systemd[1]: modprobe@drm.service: Deactivated
successfully.
[ 10.170718] systemd[1]: Finished Load Kernel Module drm.
[ 13.750415] snd_hda_intel 0000:10:00.1: Handle
vga_switcheroo audio client
[ 13.750632] snd_hda_intel 0000:30:00.1: Handle
vga_switcheroo audio client
[ 13.879276] snd_hda_intel 0000:30:00.1: bound 0000:30:00.0
(ops amdgpu_dm_audio_component_bind_ops [amdgpu])
Is that kernel/modconfig config incorrect?
Not relevant to the problem?
Something else(where) needed?
