Problems with various AMD GPU generations and 2560x1440 screen

rvp

bbartlomiej Can you post the Xorg.0.log from the Thinkpad so that I verify that the EDID retrieved is the same?

Can you see if, say, FreeBSD 12.x (which should end up bringing in a DRMKMS of the same vintage as NetBSD (5.6) or maybe 5.10, now) manages to achieve the full resolution? Just install onto a spare USB flash drive or somesuch, then: pkg install xorg drm-kmod; sysrc kld_list="radeonkms"

bbartlomiej

rvp I've uploaded Xorg.0.log from T480 for both intel driver and modesetting. By default it starts with intel but I've dropped in

Section "Device"
        Identifier "intel"
        Driver "modesetting"
EndSection

and only the modesetting driver prints out EDID data. Seems the modeline printed for 2560x1440 is the same as for HD 8570 however the actual EDID hex data seems different. Weird!

HD 8570:

[   104.732] (II) modeset(0): EDID (in hex):
[   104.732] (II) modeset(0): 	00ffffffffffff0030aee96100000000
[   104.732] (II) modeset(0): 	0a200103803c22782e6665a9544c9d26
[   104.732] (II) modeset(0): 	105054a1080081809500b300d1c0d100
[   104.732] (II) modeset(0): 	a9c081c08100565e00a0a0a029503020
[   104.732] (II) modeset(0): 	3500615d2100001a000000fc00503237
[   104.732] (II) modeset(0): 	682d32300a2020202020000000fd0032
[   104.732] (II) modeset(0): 	4c1e5a22000a202020202020000000ff
[   104.732] (II) modeset(0): 	0056393039585759480a202020200190
[   104.732] (II) modeset(0): 	02031ff14c01020304051413901f120e
[   104.732] (II) modeset(0): 	0f23090f078301000065030c00100001
[   104.732] (II) modeset(0): 	1d007251d01e206e2855005550210000
[   104.732] (II) modeset(0): 	1e8c0ad08a20e02d10103e9600555021
[   104.732] (II) modeset(0): 	00001800000000000000000000000000
[   104.732] (II) modeset(0): 	00000000000000000000000000000000
[   104.732] (II) modeset(0): 	00000000000000000000000000000000
[   104.732] (II) modeset(0): 	00000000000000000000000000000094
[   104.732] (II) modeset(0): Not using default mode "1920x1080" (bad mode clock/interlace/doublescan)
[   104.732] (II) modeset(0): Not using default mode "2048x1152" (bad mode clock/interlace/doublescan)
[   104.732] (II) modeset(0): Printing probed modes for output HDMI-1
[   104.732] (II) modeset(0): Modeline "2560x1440"x60.0  241.50  2560 2608 2640 2720  1440 1443 1448 1481 +hsync -vsync (88.8 kHz eP)

Intel GPU:

[   389.991] (II) modeset(0): Number of EDID sections to follow: 1
[   389.991] (II) modeset(0): EDID (in hex):
[   389.991] (II) modeset(0): 	00ffffffffffff0030aee96100000000
[   389.991] (II) modeset(0): 	0a200104a53c22783e6665a9544c9d26
[   389.991] (II) modeset(0): 	105054a1080081c0810081809500a9c0
[   389.991] (II) modeset(0): 	b300d1c00101565e00a0a0a029503020
[   389.991] (II) modeset(0): 	3500615d2100001a000000fc00503237
[   389.991] (II) modeset(0): 	682d32300a2020202020000000fd0032
[   389.991] (II) modeset(0): 	4c1e5a24000a202020202020000000ff
[   389.991] (II) modeset(0): 	0056393039585759480a202020200127
[   389.991] (II) modeset(0): 	020318f14b9005040302011f13140e0f
[   389.991] (II) modeset(0): 	23090f0783010000662156aa51001e30
[   389.991] (II) modeset(0): 	468f33000f282100001eab22a0a05084
[   389.991] (II) modeset(0): 	1a30302036000f282100001c7c2e90a0
[   389.991] (II) modeset(0): 	601a1e40302036000f282100001c0000
[   389.991] (II) modeset(0): 	00000000000000000000000000000000
[   389.991] (II) modeset(0): 	00000000000000000000000000000000
[   389.991] (II) modeset(0): 	0000000000000000000000000000006a
[   389.991] (II) modeset(0): Printing probed modes for output DP-2
[   389.991] (II) modeset(0): Modeline "2560x1440"x60.0  241.50  2560 2608 2640 2720  1440 1443 1448 1481 +hsync -vsync (88.8 kHz eP)

I will do more tests with the adapter and FreeBSD over the weekend. I need to travel for work tomorrow.

rvp

bbartlomiej Seems the modeline printed for 2560x1440 is the same as for HD 8570 however the actual EDID hex data seems different. Weird!

The monitor being connected via DisplayPort might account for that. However, there's something suggestive to be seen in a edid-decode -n output:

$ edid-decode -n < edid1.txt
[...]
Native Video Resolution if only Block 0 is parsed:
  2560x1440

----------------

Native Video Resolutions if Block 0 and CTA-861 Blocks are parsed:
  129x0                    # this looks like a bug
  1920x1080                # only this over HDMI?
$

Compare against edid-decode -p

bbartlomiej

Not sure what that would mean. The screen supports 2560x1440 over HDMI since it works on HD 8570 (although with software only rendering).

I tested with HD 7450 today and my DisplayPort-HDMI adapter but it didn't work at all (even in BIOS/UEFI). I am not getting any output when I use HDMI on GPU and plug it in DisplayPort port on the screen. Maybe it's a one-way adapter (DP -> HDMI, not HDMI -> DP)

Testing now with FreeBSD 12.4.

rvp

bbartlomiej Not sure what that would mean. The screen supports 2560x1440 over HDMI since it works on HD 8570 (although with software only rendering).

Yes, but the question is whether the other 2 cards can drive 2560x1440 over HDMI. Anyway, can you try passing this EDID blob to Xorg?

00FFFFFFFFFFFF0030AEE96100000000
0A200103803C22782E6665A9544C9D26
105054A1080081809500B300D1C0D100
A9C081C08100565E00A0A0A029503020
3500615D2100001A000000FC00503237
682D32300A2020202020000000FD0032
4C1E5A22000A202020202020000000FF
0056393039585759480A202020200190
02031FF14C01020304051413101F120E
0F23090F078301000065030C00100001
1D007251D01E206E2855005550210000
1E8C0AD08A20E02D10103E9600555021
00001800000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000014

Convert to binary:

$ printf "$(sed 's/../\\x&/g' edid.txt | tr -d '\n')" > HDMI-edid.bin
$ edid-decode < HDMI-edid.bin          # check if correct

Pass this blob to the radeon driver:

Option "CustomEDID" "HDMI-0:/some/path/HDMI-edid.bin:digital"

(Not sure if the :digital bit is reqd.)

Post the Xorg.0.log files.

I've just removed the "native" from the 1920x1080 resolution in the CTA-block. See if the Xorg server swallows this like a good boy.

bbartlomiej

rvp Try starting Firefox in an English locale: env LANG=en_US.UTF-8 firefox or env LANG=en_GB.UTF-8 firefox. And, after you've picked your jaw up off the floor, file a PR.

No, that didn't make any difference. On HD7450 using radeon driver it starts in 1920x1080 and screen has artifacts on XFCE4 desktop, menu entries and within Firefox's window - stuff missing from web pages. Added another screenshot to my Nextcloud link.

rvp Option "CustomEDID" "HDMI-0:/some/path/HDMI-edid.bin:digital"

I can't make Xorg read my custom file 🙁

[   139.286] (WW) RADEON(0): Option "UseEDID" is not used
[   139.286] (WW) RADEON(0): Option "CustomEDID" is not used

Updating to 10.0_RC4 since there were some changes in GPU-related areas (although Intel-related). In the end I will raise a PR since I'm also out of ideas.

rvp

bbartlomiej Everything seems smooth BUT some applications like Firefox do not show all graphics correctly - like images missing on web pages, especially the ones with transparency. Some Firefox tabs also do not have the correct shape (missing rounded corners etc. also on web pages). This is very odd.

Try starting Firefox in an English locale: env LANG=en_US.UTF-8 firefox or env LANG=en_GB.UTF-8 firefox. And, after you've picked your jaw up off the floor, file a PR.

rvp

bbartlomiej I can't make Xorg read my custom file

Ah, hell! I looked at the wrong radeon(4) man-page. Might have to fix this up in the kernel then. Did you try out FreeBSD or Linux on these cards?

bbartlomiej

rvp I started testing with FreeBSD 12.4 but there are no packages available anymore and ports gives warning that it's too old to be supported and no guarantee stuff will compile so I stopped that.

I did test with old Ubuntu with Linux 5.15.0 kernel and it seems to behave the same way on HD7450:

resolution is 1920x1080
Xorg.0.log shows modelines are read from the screen for 2560x1440 but are not used when I try to use xrandr
when I manually add a mode to xrandr using cvt, screen goes blank as on NetBSD.

I've attached the dmesg and Xorg.0.log in the link I shared at the beginning but it looks like this version of DRM doesn't support this card with this screen properly. I tested with Ubuntu using Linux 6.x and it is the same.

So my best shot is to wait for Radeon HD 8670 to get support in NetBSD as this did work on Linux 6.x.
Or can any of you recommend another GPU that's supported by NetBSD and will work in 2560x1440?
Thanks for all the help!

rvp

bbartlomiej I did test with old Ubuntu with Linux 5.15.0 kernel and it seems to behave the same way on HD7450:

Hmm. What about the latest Ubuntu?

bbartlomiej Xorg.0.log shows modelines are read from the screen for 2560x1440 but are not used when I try to use xrandr

I wanted to ask about this before, then plumb forgot: Can you post the xrandr output, and the command you used to set the new mode?

bbartlomiej when I manually add a mode to xrandr using cvt, screen goes blank as on NetBSD.

Did you try the modeline printed/got from EDID? Is it the same as what's generated by cvt?

bbartlomiej Or can any of you recommend another GPU that's supported by NetBSD and will work in 2560x1440?

Answered in post #8.

bbartlomiej

rvp Hmm. What about the latest Ubuntu?

tried just now. Same thing (Ubuntu now is full Wayland).

rvp I wanted to ask about this before, then plumb forgot: Can you post the xrandr output, and the command you used to set the new mode?

root@ubuntu:/sys/class/drm/card0-HDMI-A-1# xrandr --newmode 2560x1440 312.25 2560 2752 3024 3488 1440 1443 1448 1493 -hsync +vsync root@ubuntu:/sys/class/drm/card0-HDMI-A-1# xrandr --addmode HDMI-0 2560x1440 root@ubuntu:/sys/class/drm/card0-HDMI-A-1# xrandr Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384 HDMI-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 609mm x 349mm 1920x1200 59.95 1920x1080 60.00* 60.00 50.00 59.94 1920x1080i 60.00 50.00 59.94 1680x1050 59.88 1600x900 60.00 1280x1024 60.02 1440x900 59.90 1280x800 59.91 1280x720 60.00 50.00 59.94 1024x768 60.00 1440x480 60.00 59.94 800x600 60.32 720x576 50.00 720x480 60.00 59.94 640x480 60.00 59.94 720x400 70.08 2560x1440 59.96 VGA-0 disconnected (normal left inverted right x axis y axis) root@ubuntu:/sys/class/drm/card0-HDMI-A-1# xrandr --output HDMI-0 --mode 2560x1440 root@ubuntu:/sys/class/drm/card0-HDMI-A-1# xrandr --output HDMI-0 --auto root@ubuntu:/sys/class/drm/card0-HDMI-A-1# uname -a Linux ubuntu 6.5.0-9-generic #9-Ubuntu SMP PREEMPT_DYNAMIC Sat Oct 7 01:35:40 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux

Of course on xrandr output you see 2560x1440 beacause I manually added it to HDMI-0

rvp Did you try the modeline printed/got from EDID? Is it the same as what's generated by cvt?

I remember trying both with modeline from cvt and the one from Xorg.0.log - same issue on HD 7450

rvp Answered in post #8.

Is Intel Arc supported by NetBSD? I haven't seen it in man pages anywhere. It stopped on Iris I think? Since my CPU is AMD Ryzen 9 I can't really use the Intel iGPU. I could only go with discrete Intel Arc GPU.

rvp

bbartlomiej

root@ubuntu:/sys/class/drm/card0-HDMI-A-1# xrandr --newmode 2560x1440 312.25  2560 2752 3024 3488  1440 1443 1448 1493 -hsync +vsync

Hmm. That doesn't match what Xorg prints:

[   104.732] (II) modeset(0): Modeline "2560x1440"x60.0  241.50  2560 2608 2640 2720  1440 1443 1448 1481 +hsync -vsync (88.8 kHz eP)

Can you try with those?

bbartlomiej

rvp
I did try with modelines from Xorg.0.log on NetBSD. The above snippets were from cvt just to show how I set it. Since it's Wayland-based I couldn't get the same logging information.

I tried with the same modeline on Ubuntu:

ubuntu@ubuntu:~$ xrandr --newmode 2560x1440 241.5 2560 2608 2640 2720 1440 1443 1448 1481 +hsync -vsync ubuntu@ubuntu:~$ xrandr Screen 0: minimum 320 x 200, current 1920 x 1200, maximum 16384 x 16384 HDMI-0 connected primary 1920x1200+0+0 (normal left inverted right x axis y axis) 609mm x 349mm 1920x1200 59.95* 1920x1080 60.00 60.00 50.00 59.94 1920x1080i 60.00 50.00 59.94 1680x1050 59.88 1600x900 60.00 1280x1024 60.02 1440x900 59.90 1280x800 59.91 1280x720 60.00 50.00 59.94 1024x768 60.00 1440x480 60.00 59.94 800x600 60.32 720x576 50.00 720x480 60.00 59.94 640x480 60.00 59.94 720x400 70.08 VGA-0 disconnected (normal left inverted right x axis y axis) 2560x1440 (0x6da) 241.500MHz +HSync -VSync h: width 2560 start 2608 end 2640 total 2720 skew 0 clock 88.79KHz v: height 1440 start 1443 end 1448 total 1481 clock 59.95Hz ubuntu@ubuntu:~$ xrandr --addmode HDMI-0 2560x1440 ubuntu@ubuntu:~$ xrandr --output HDMI-0 --mode 2560x1440

Still blank screen with mode out of range and I had to revert blind with:

ubuntu@ubuntu:~$ xrandr --output HDMI-0 --auto

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