I managed to work around this by adding the following lines to grub. radeon.modeset=0 noapic
After doing this, suspend to ram has worked 100%. -- screen backlight off after resume-from-suspend when using ATI KMS https://bugs.launchpad.net/bugs/434956 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs