Sorry I forgot, you can also enable the drm debug flag without unloading and reloading it:
echo 1 | sudo tee /sys/module/drm/parameters/debug
And to turn it off again, if the machine hasn't crashed yet :)
echo 0 | sudo tee /sys/module/drm/parameters/debug
Sorry I forgot, you can also enable the drm debug flag without unloading and reloading it: drm/parameters/ debug drm/parameters/ debug
echo 1 | sudo tee /sys/module/
And to turn it off again, if the machine hasn't crashed yet :)
echo 0 | sudo tee /sys/module/
(For those interested in debugging, I added this to https:/ /wiki.ubuntu. com/Bugs/ AtiDriver)