Re: USB not working after resume & black screen
- --- In email@example.com, Peter Dobrev <p3sho@y...>
>The poblem seems to be switching the monitor back on after DPMS has
> Yes, but DPMS is for switching off the screen when
> suspending, and when I close the lid, it does not
switched it off. Re. the mouse freezing, I found that this happened
when switcing into 'sleep' state, however things worked OK if only
using 'standby' power down as long as the DPMS line was comnmented
out. Using standby mode on kUbuntu worked fine out of the box (no
need to configure anything other than the standby preference for power
How 'acpi' works! This is not straightforward to explain but here
goes. 'acpi' is configured with files in the /etc/acpi/events each of
which has an 'event' and 'action' entry. The event specifies the key
that is associated with the action, which is generally a script in
the directory higher (e.g. suspend button runs sleep.sh, which at the
end calls resume.sh).
Maybe the problem is (off the top of my head) that the default Ubuntu
acpi install only has a sleep mode that uses 'S3' state which (I'm
guessing here) the Dell C600 which I use does not support - supporting
only S1 and S2D) - which means a new acpi script needs writing and
event file configuring.
Check your BIOS settings, I found I could get the Fn + Suspend key
combination to work as long as power management was at least to some
extent enabled in the BIOS.