[fritsch]

Code:

mount -o remount,rw /flash
nano /flash/syslinux.cfg and place this drm.debug=0xe behind the other stuff in the kernel command line (same line, no new line)
Save the file with CTL o and exit with CTL x
mount -o remount,rw /flash
reboot

Whenever you fuckup that file you can change it again with a live boot cd or another OE live stick.