Can't live boot from USB to install Fedora 42 with dedicated AMD GPU

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1

Today

TL;DR I cannot get fedora (and other distros) to live boot from a USB to try&install it whenever I am using my dGPU. In contrast, using my iGPU everything works fine. Exceptions are Debian&Mint which work fine.

I use the fedora media writer and boot from my USB stick. I only get two , seemingly unrelated, errors that have to do with USB devices I assume:

hid-generic 0003:1532:0099.000A: No inputs received, leaving

uusb 1-10: parse_audio_format_rates_v2v3(): unable to retrive number of sample rates (clock 3)

Everything else loads just fine, and in the end it “boots” to a blank screen with a cursor in the middle. If I use ventoy instead then it doesn’t even try to boot, it freezes to a blank screen after grub. However, when I unplug my dGPU and plug an HDMI to the motherboard then it boots normally on the iGPU.

I have an AMD ryzen 5 9600x and my gpu is RX 6600 XT.

This also happens with other distros such as kubuntu, manjaro KDE, popOS, ubuntu, arch; they all live-boot with the iGPU just fine but with the dGPU I get a blank screen.

Two exceptions I found are Mint (Cinammon) and Debian. These live boot and install just fine directly with the dGPU plugged in.

How can I diagnose and solve this problem? The RX 6600 XT is not new anymore and it seems to be very well supported with recent kernels that contain the amd drivers. What is the easiest workaround to get Fedora (and potentially other distros with this problem) to work?

2

Could you try if one of the live respins boots with the dGPU?
They were last updated at the end of May.

3

Same result, everything loads okay but it boots to a blank screen with a cursor.

4

Too bad. Maybe try again when those images are updated.

5

Do you have any idea what the issue is? Is there any known issue with AMD gpus with recent kernels?

6

IIRC, AMD had quite a lot of issues with some kernel versions 6.14. 7 and 8 and also some mesa versions had issues. I don’t have an AMD GPU so that’s what I was reading here in this forum.

you could try boot a rawhide image, those are updated daily(?)
I guess this is probably booting a 6.16 pre-release kernel. I would not install this, but should be safe to test if the very bleeding edge solves the issue on your system.

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