Pb Asus K53TA X11 est très long a démarrer

/etc/default/grub

GRUB_CMDLINE_LINUX_DEFAULT="radeon.runpm=0"
sudo update-grub

Voir https://bbs.archlinux.org/viewtopic.php?id=177254

/etc/modprobe.d/boot_radeon.conf

options radeon dpm=1 options radeon audio=1 options radeon runpm=0
sudo update-initramfs -k all -u
cat /sys/kernel/debug/vgaswitcheroo/switch echo OFF > /sys/kernel/debug/vgaswitcheroo/switch echo DIS > /sys/kernel/debug/vgaswitcheroo/switch