Lucid Lynx Suspend Problems with Radeon Driver

Sven Bachmann
linux

Since updating to Lucid, a Dell Inspiron 1501 with an Radeon Xpress 200M video card had become problems after going into suspend mode. After waking up it was not possible to reactivate the screen. It stays black and the only possibility was to power off.

But with the help of Google, I stumpled upon to sites (Launchpad and ubuntu-bugs@lists.ubuntu.com) which gave two kernel options:

  • radeon.modeset=0
  • pci=nomsi

This will disable the kernel mode settings and message signaled interrupts. Since that, the Dell correctly wakes up again.

To add this to your boot parameters, open the file /etc/default/grub and edit the following line as root:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash radeon.modeset=0 pci=nomsi"

Than run the grub update with this command (also as root): update-grub - and your done.