I have to reopen this bug. If laptop-detect (inside /etc/init/vbesave)
fails to detect a laptop (for instance because of bug #40503), the
vbestate is not saved.
In resume.d/17-video-restore.sh the vbestate is unconditionally
restored. I guess the command will just fail if the $VBESTATE file does
not exist. Anyway, it would be better to check if the file exist before
carrying on.
suspend.d/80-video-vesa-state.sh also takes for granted that the file
was saved at boot.
I guess this kicks in only in the case where SAVE_VBE_STATE has been set
to true _and_ laptop-detect fails. Maybe SAVE_VBE_STATE should be
disabled somehow if laptop-detect fails.
Since laptop-detect is broken on my laptop, I put "LAPTOP=true" in
/etc/default/acpi-support, and this seems to have fixed the display
corruption I had at resume from hibernation.
** Changed in: acpi-support (Ubuntu)
Status: Fix Released => Unconfirmed
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vbestate handling is broken in sleep/resume (Presario 700)
https://launchpad.net/bugs/38500
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