PATCH: xserver-xorg-video-intel... startup with less screen blinking!

Peter Clifton pcjc2 at
Mon Oct 15 09:02:09 PDT 2007

Attached is a patch I've been playing with to reduce screen blinking
when loading the Intel driver.

It drops an extra hardware state restore / save in the init path, and
will restore the registers saved during pre-init rather than EnterVT.

The extra tv restore helps to avoid the TV registers being left changed.
(I know KP didn't really want to distribute the save/restore calls in
different places... but it works for now).

I also commented out the register compare entering the VT (as I guess we
expect there may be changes left from the pre-init probing.)

It works for me, but I appreciate it might not be the right thing to do.

With the current driver, I feared for my backlight (surely blinking it
on and off excessively isn't good for its lifespan?)

Any comments?

Peter Clifton

Electrical Engineering Division,
Engineering Department,
University of Cambridge,
9, JJ Thomson Avenue,

Tel: +44 (0)7729 980173 - (No signal in the lab!)
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