[SOLVED] Graphical boot fails after switching to amdgpu

Jt0 · n00b Joined: 28 Oct 2018 Posts: 33

I'm trying to get my desktop upgraded to a 5.x kernel and would like to move from radeon to amdgpu for my graphics card driver. I followed the directions in the wiki and when I rebooted, the boot failed at the handoff from whatever simple graphical driver is used at the beginning of boot to the amdgpu driver.
I rebooted with a working 4.20 kernel and changed the firmware files from the "radeon" variants (listed next to TAHITI in the table of firmware to include) to the "amdgpu" variants. The TAHITI_uvd.bin and TAHITI_vce.bin files are missing from the amdgpu firmware directory, so I left those off completely. Upon rebooting the handoff to amdgpu was successful, but SDDM won't start. Since the problem was caused by a change in kernel configuration, I thought this subforum would be the right place for this question.

I've tried adding in the missing firmware files from the radeon firmware directory but that doesn't change anything. I've also tried adding "radeon" to my VIDEO_CARDS section of make.conf as suggested in the troubleshooting section of the wiki guide, but that didn't help anything. When I try "/etc/init.d/xdm start" I get a message saying xdm was already started. When I try to restart xdm the screen goes blank for a split second then returns to the terminal.
When I try "startx" I get

ilnanny · Posted: Tue Apr 30, 2019 5:34 am Post subject:

NeddySeagoon · Posted: Tue Apr 30, 2019 9:30 am Post subject:

Jt0,

There will be a lot of useful information in dmesg and maybe /var/log/Xorg.0.log

Please pastebin both from your broken Gentoo.
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.

Jt0 · n00b Joined: 28 Oct 2018 Posts: 33

ilnanny,
I'm not sure what to make of the code block you posted. I don't have a lot of those files present with sys-kernel/linux-firmware-20190424 installed, just the ones I listed in my first post. I already tried the troubleshooting section you linked to.

NeddySeagoon,

dmesg

Xorg.0.log

I didn't see anything out of the ordinary in dmesg. The xorg log seems to show that a "Radeon" device is being loaded, which is strange because I deleted the 10-radeon.conf file from /usr/share/X11/xorg.conf.d since I thought it was interfering with the 10-amdgpu.conf file in the same directory (I found a thread on Phoronix where this was the solution to the same problem). lspci shows that amdgpu is being used for the graphics card.

NeddySeagoon · Posted: Tue Apr 30, 2019 1:11 pm Post subject:

Jt0,

Put updating your microcode on your todo list.

Jt0 · n00b Joined: 28 Oct 2018 Posts: 33

Thanks, that was exactly what was wrong!

It looks like there are two directories for X11 configuration files, /etc/X11/xorg.conf.d and /usr/share/X11/xorg.conf.d. I guess the /etc directory has higher priority because there was a 20-radeon.conf file sitting in there. I commented out each line in the file and rebooted, and not only did it boot right into the graphical environment, but I also got a good result when checking for my microcode being updated: