Comment 22 for bug 850895

Right, the lack of centering is not unsurprising. That may be something you can adjust in your monitor's settings, fwiw.

When you have a chance, please show the output of this command:

readlink -f /sys/dev/char/$((0x$(stat -c %t /dev/dri/card0))):$((0x$(stat -c %T /dev/dri/card0)))/device/driver

also this one:

ls -l /sys/dev/char/$((0x$(stat -c %t /dev/dri/card0))):$((0x$(stat -c %T /dev/dri/card0)))/device/

Something is different with the sysfs layout for your card than plymouth is expecting, which is causing it to fail to use the drm driver.