Hello.
Friend of mine kept bugging me to look at his problem. He has Gateway
NV78 and tried to install ubuntu 12.10. Encountered backlight problem
(he thought all was dead).
Tried a few suggestions to no avail. The 'setpci' worked, but did not
help after screen-saver/hibernate/etc.
I have not had any real time to spend of this, nor look at source so...
here is a pathetic work-a-round that got him working and not complaining:
file: /etc/rc.local (add):
if [ -x /lib/init/backlight_workaround ]
then
/lib/init/backlight_workaround
fi
create file '/lib/init/backlight_workaround' and
chmod +x /lib/init/backlight_workaround
put in file: /lib/init/backlight_workaround
#!/bin/sh
( while sleep 1; do /usr/bin/setpci -s '00:02.0' 'F4.B=00'; done & ) &
hope this helps someone else too.
(file name & location used is just an example, but demonstrates the idea).
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https://bugs.launchpad.net/bugs/765438
Title:
On startup, the backlight is off on laptop
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