Thanks for the advice. I had tried putting a config snip very similar to
this into /etc/X11/xorg.conf.d, but now that I think about it, I think I
included the Driver line, which might have broken it. I'll try it again
exactly as you specified.
On 04/25/2016 02:53 AM, Julien Cristau wrote:
On Sun, Apr 24, 2016 at 21:55:12 -0700, J Mo wrote:
Package: xorg
Version: 1:7.7+15
Severity: normal
I have Zotac ZBox Nano CA320 which uses an AMD APU with a Radeon HD 8250. It's
an Intel NUC-like system, and this chip is commonly found on laptops.
I have X running KDE5 (sddm) successfully but am troubleshooting another video
bug. I wanted to turn off AccelMethod glamor (the default) to find out if the
admgpu/radeon driver was causing some artifacts when glamor mode was active (as
opposed to EXA).
I tried shutting down sddm and then running "Xorg -configure", but that fails with the
"Number of created screens does not match number of detected devices." error. I have
attached the log from that session. The output Xorg.conf.new file looks fairly complete, but no
configuration that I've tried works. The only thing that will get X working successfully is no
manual configuration.
I've also tried just dropping config bits into /etc/X11/xorg.conf.d/ and
anything short of a blank file causes Xorg to fail.
If we read here:
https://wiki.debian.org/Xorg#What_if_I_do_not_have_an_xorg_config_file.3F
This is apparently a fairly common and well-known problem, but there doesn't
seem to be any resolution that I was able to find. The advice on the wiki link
above is non-helpful.
So, what now?
Yes, Xorg -configure is known broken. Don't use that. Just write
Section "Device"
Identifier "glamor"
Option "AccelMethod" "glamor"
EndSection
to /etc/X11/xorg.conf.
