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Radeon kernel driver: Debugging

Posted: Wed Jun 28, 2023 9:18 am
by xeno74
First:

setenv bootargs "root=<root_partition> modprobe.blacklist=radeon" (this will prevent the radeon kernel driver from getting loaded automatically).

Then once the system is booted up, log in via SSH and run

sudo modprobe radeon

This way you should be able to capture dmesg output from loading the radeon driver.

Please note: You need the radeon kernel driver as a module.

Re: Radeon kernel driver: Debugging

Posted: Wed Jun 28, 2023 11:33 am
by xeno74
The radeon graphics driver is part of our kernel and cannot be blacklisted via modprobe. Use the initcall_blacklist kernel parameter instead.

Code: Select all

initcall_blacklist=radeon_init

Re: Radeon kernel driver: Debugging

Posted: Wed Jun 28, 2023 12:19 pm
by sailorMH
thanks, good tip!

Re: Radeon kernel driver: Debugging

Posted: Wed Jun 28, 2023 6:50 pm
by xeno74
But I haven't tried it out.

Re: Radeon kernel driver: Debugging

Posted: Sat Jul 01, 2023 10:46 am
by Hypex
Does this require a serial debug terminal link? And are there any specific Radeon driver problems we are currently experiencing?