23.10 Xorg configuration testing

I am transferring a bunch of (late night your time , early morning my time ) posts from the Discord to here, try to de-clutter the Discord channels (if I can).

@paulwratt — 2023/10/31 at 10:27 AM I have not been able to get X running, so I cant use FireFox on that machine yet. X did a core-dump (and hang) the 1st time I ran it (as root), but it just quits if I startx as a user "unknown display: t2-5700G:0", when it doesn't core-dump and (looks like a) hang

paulwratt — 2023/10/31 at 10:35 AM

xauth: (argv):1:  bad display name "t2-5700G:0" in "remove" command
VT switchinit: connection to X server lost

am I having problems with the default Xorg configuration because I have a - symbol in the hostname?

@r2t2 — 2023/10/31 at 10:51 AM I have seen this sometimes, should probably have debugged where this regression is coming from 😕 which gpu is this? or VM?

@paulwratt — 2023/10/31 at 11:10 AM amdgpu - but I also noticed in ... /xor.conf.d/ that there is both 10-amdgpu.conf and 10-radeon.conf although the screen and card sections reference driver=amdgpu . its the internal GPU for the 5700G on an Asus Tuff Gaming B550M Plus (WiFi)

@paulwratt — 2023/10/31 at 11:22 AM I too like the idea of a PID. dont have to grep a special PS then. I think that last entry in rocknet_dhcp is missing another line:

addcode down 5 6 "sleep 1; ip link set $if down"

@paulwratt — 2023/10/31 at 12:45 PM Hmm .. I just ran /etc/init.d/xcfgt2 start and it says X Driver: radeon and there is no SystemID either

OK that "no SystemID" is because dmidecode (and ddcprobe) is not install on the base ISO ( I am using t2-23.10-x86-64-minimal-firefox-gcc-musl-nocona.iso )

@paulwratt — 2023/10/31 at 1:00 PM xcfgt2 has 2 ways of picking up the graphics card, the one it is showing me is the one from lspci which looks for a VGA, but if that fails, the fallback is /sys/class/graphics/fb0/name and on my setup that is amdgpudrmfb

@paulwratt — 2023/10/31 at 1:08 PM note that the fallback if either of those fail (older graphics card) is to look in uname -m for i*86|x86*64 and use vesa otherwise use fbdev, but this kernel outputs x86-64 and we already know from above that it should choose fbdev on this machine - it never gets to keep the output of this section tho, because in .. the next section, the 1st match is for radeon so .. there should be a selection before that that reads:

*amdgpu*)  xdrv=amdgpu

and probably have 2x checks for the card so you can print the lspci entry, but if there is anything in ../fb0/name then it should use that to match for the correct driver

@paulwratt — Yesterday at 1:21 PM BTW I have an old P4 with an HD5470 PCI, so I could (potentially) test t2 for a valid Radeon card RE: 2x gfx card checks: or add a clause after that CASE section, like the check for xdrv=nv

@paulwratt — 2023/10/31 at 1:32 PM Hmm .. I am not 110% sure but I think there is an X Windows DRM graphics driver specifically called amdgpudrmfb. EDIT: I might have confused that with DRI ..

(I am going of some vague items I saw on the RPi and using DRM in an xorg.conf)

@paulwratt — 2023/10/31 at 5:35 PM ok, did some changes, and the result is ... exactly the same as the 1st time I ran it as root, VT7 has a blinking cursor, But VT5 (where I run it from) is blank, and when I (gracefully) kill xinit there is a bunch of XFCE errors (WARNINGs actually, all with the wrong EOL characters), and :

No window manager registered on screen 0. To start the xfdesktop without this check, run with --disable-um-check

and that same xauth: error posted above.

@paulwratt — 2023/10/31 at 5:44 PM Note that is the same end result as when Xorg is run with the radeon driver too

I would need console soft-scrollback to be able to debug this any further

I looked at the Arch Linux wiki:

@paulwratt — 2023/10/31 at 5:51 PM https://wiki.archlinux.org/title/Xorg#AMD Xorg and I checked their reference with WikiPedia: https://en.wikipedia.org/wiki/List_of_AMD_graphics_processing_units#Features_overview List of AMD graphics processing units

The following is a list that contains general information about GPUs and video cards by AMD, including those by ATI Technologies before 2006, based on official specifications in table-form.

amdgpu is the correct driver for a VEGA class GPU (like the one in the 5700G)

@r2t2 — 2023/10/31 at 8:21 PM Best run config less. Xcfgt2 is an old thing from when a config was needed I mostly left it for illustration purposes ONLY

I missed this post for some reason ???

@paulwratt — 2023/11/01 at 12:09 AM Just spent a couple of (11.5?) hours looking at the output of :

X -verbose 6 > ~/xlog.txt 2>&1

and it appears that after much copy and pasting, editing and reviewing, that the failure might be due to the disconnected DisplayPort using Monitor1 and the connected HDMI NOT having a Monitor section (oh joy)

@paulwratt — 2023/11/01 at 12:17 AM Well at least I got Modelines out of it, and an EDID text binary blob 🙂

rxrbln / t2sde

23.10 Xorg configuration testing #138