I too have a wonderfull Dell c400 and the info in this bug helped me get
suspend working. Thanks. However, my config of Ubuntu seems a bit
different so the instructions that work for me are listed below. Note
that the splash boot option caused the cosole video to core dump in
combination with nomodeset so I removed it.
Fix for Ubuntu 9.10:
1a) In /etc/default/grub
add i915.modeset=0 nomodeset to GRUB_CMDLINE_LINUX_DEFAULTcat. This disables
the new kernel mode-setting (KMS):
GRUB_CMDLINE_LINUX_DEFAULT="quiet nomodeset"
or
GRUB_CMDLINE_LINUX_DEFAULT="quiet i915.modeset=0"
1b) Save and run update-grub.
2. In /usr/lib/pm-utils/sleep.d/98smart-kernel-video
add return 1 in have have_smart_intel:
have_smart_intel()
{
# Not sure which option cuses blank screen after suspend restore but
# disabling this section works.
return 1
3) Save and reboot.
--
pm-suspend with quirks does not restore backlight anymore
https://bugs.launchpad.net/bugs/417599
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