Arch Linux

jlindgren

Member

Registered: 2011-02-27

Posts: 260

[SOLVED] USB-C/DP displays not working in kernel 6.1.1 (amdgpu)

After updating to linux 6.1.1.arch1-1 my system no longer boots with external displays attached (USB to DisplayPort adapter).
I downgraded to linux 6.0.12.arch1-1 and all is good again.

I reported my issue upstream but thought I'd post the workaround here as well in case it helps someone else.
https://gitlab.freedesktop.org/drm/amd/-/issues/2314

HP Probook 445 G6 / AMD Ryzen 2500u / Radeon RX Vega 8

edit: Just to note that (at least for laptop users) you can also get the system to boot up by unplugging the USB-C adapter. Helps if you don't have SSH set up

Last edited by jlindgren (2024-03-18 03:18:42)

moson

Member

Registered: 2021-06-03

Posts: 10

Website

Re: [SOLVED] USB-C/DP displays not working in kernel 6.1.1 (amdgpu)

Was reported quite some time ago already: https://gitlab.freedesktop.org/drm/amd/-/issues/2171

Looks like it'll take some time for a fix though

jlindgren

Member

Registered: 2011-02-27

Posts: 260

Re: [SOLVED] USB-C/DP displays not working in kernel 6.1.1 (amdgpu)

Looks like it'll take some time for a fix though

This was very prescient. Here we are 4+ months and two kernels later, and 6.3.1 is still utterly broken.

I have been using some reverts/patches in the meantime, which can be found here (currently for 6.2.10, working on updating for 6.3.1):
https://github.com/jlindgren90/linux/tree/v6.2.10-fixes

jlindgren

Member

Registered: 2011-02-27

Posts: 260

Re: [SOLVED] USB-C/DP displays not working in kernel 6.1.1 (amdgpu)

Fixed 1 year and 3 months later (!) in Linux 6.8.1.

Buy AMD, they said. It'll be better, they said.