[SOLVED] Graphics problem: install on AMD Radeon 5600 XT

csteeves · n00b Joined: 20 Aug 2007 Posts: 61

Hello,

I am installing Gentoo on a new box with Gigabyte Aorus X570 motherboard, AMD Ryzen 5 CPU and Sapphire Radeon 5600 XT video card. I boot the system with the current SystemRescueCD kernel from a memory stick and everything works as expected - specifically the video card produces the anticipated text console. After going through the Handbook, installing everything, compiling the kernel and configuring GRUB, I restart the system. GRUB appears to work and offers the correct kernel to load. The message "Loading Linux 5.4.38" appears for a few seconds and then the screen goes black, with nothing ever reappearing. It seems the kernel is booting, as I can type root and the root password, and then shutdown -h now and the computer shuts down. I have tried the instructions for AMDGPU from the Gentoo Wiki, as well as every variant of basic VGA graphics that I can think of in the kernel, but I do not get any different results.

When the SystemRescueCD boots, it selects the amdgpu kernel module - see the lspci output below. I attach the kernel config from the new kernel as a separate paste. By now I have tried so many different combinations of kernel options that it is probably completely borked. For obvious reasons, I am having a hard time getting the dmesg output from the new box and the new kernel. I would ssh into the new box, but for stupid technical reasons - only one cat5 cable - I cannot right now.

kernel config

https://pastebin.com/fNc85KWp

output of lspci (from SystemRescue kernel)

https://pastebin.com/PfmACmKf

Any suggestions would be enormously appreciated.

Craig

nick_gentoo · Tux's lil' helper Joined: 07 Jan 2019 Posts: 140

It could be the issue described in several topics, like this one.
The framebuffer options in the kernel config need to be set appropriately.

csteeves · n00b Joined: 20 Aug 2007 Posts: 61

Hi Nick,

Thanks for the suggestion. The experience of the originator of that thread certainly seems similar to my own, and I was optimistic that would at least get me to a working console. Indeed, FB_SIMPLE was set to N. Unfortunately, changing it to Y led to no change to the symptoms. At present I have FB_SIMPLE, FB_VESA and FB_EFI set to Y, and DRM_AMDGPU is set to M. Maybe these conflict? I am trying various combinations.

Craig

NeddySeagoon · Posted: Tue Jun 30, 2020 9:41 pm Post subject:

csteeves,

Can you ssh into the new box and get its dmesg?

What about dumping it to a file blind, before you log out?

csteeves · n00b Joined: 20 Aug 2007 Posts: 61

Thank you NeddySeagoon!