Re: Psychedelic GUI after stable update to buster

[hobie@rumormillnews.com]

> On 14.07.2019 4:20, Felix Miata wrote:
>> hobie@rumormillnews.com composed on 2019-07-13 18:07 (UTC-0400):
>>
>>> Thanks for the tip.  Looks like a lot of information here but I don't
>>> really understand it.  Xorg seems to have unloaded the radeon
>>> driver...?
>>> Graphics:  Device-1: AMD Kaveri [Radeon R7 Graphics] vendor: ASUSTeK
>>> driver: N/A
>>>            bus ID: 00:01.0 chip ID: 1002:130f
>>>            Display: x11 server: X.Org 1.20.4 driver: ati,vesa
>>>            unloaded: fbdev,modesetting,radeon resolution: 1600x900~N/A
>>>            OpenGL: renderer: llvmpipe (LLVM 7.0 128 bits) v: 3.3 Mesa
>>> 18.3.6
>>>            compat-v: 3.1 direct render: Yes
>>> Where would I find "AMDGPU" and how would I get Xorg to use it?
>> These should cover it:
>> apt purge xserver-xorg-video-ati xserver-xorg-video-radeon
>> apt install xserver-xorg-video-amdgpu firmware-amd-graphics
> To install "firmware-amd-graphics" package is a good suggestion.
> But chances are high that removal of *-ati and *-radeon packages will
> also remove Desktop Environment, because those packages are part of
> "xserver-xorg-video-all" package.
> I'd suggest a less radical approach and simply "tell" the system what
> driver to use via modprobe config files. [1]

Thanks. :)  I find old files in /etc/modprobe.d:

-rw-r--r-- 1 root root  154 Nov 29  2016 amd64-microcode-blacklist.conf
-rw-r--r-- 1 root root   23 Apr 28  2011 i915-kms.conf
-rw-r--r-- 1 root root  154 May 15  2017 intel-microcode-blacklist.conf
-rw-r--r-- 1 root root   51 May 10  2014 modesetting.conf
-rw-r--r-- 1 root root  292 Aug  3  2012 nvidia-kernel-common.conf
-rw-r--r-- 1 root root  119 Nov 12  2013 oss-compat.conf
-rw-r--r-- 1 root root   27 Jan 19  2014 radeon-kms.conf

...I find radeon-kms.conf contains: "options radeon modeset=-1".  Is that
likely where my problem, or part of my problem, is coming from?