On Wed, 16 Jul 2008, Nigel Cunningham wrote:
> UseEvents true? How did you find out about that?
Reading thru the .../usr/share/doc/README.txt file that comes with each
unpacked NVidia driver (I'm currently up to 177.13). I do that every now
and then, and found this:
----
Option "UseEvents" "boolean"
Enables the use of system events in some cases when the X driver is
waiting for the hardware. The X driver can briefly spin through a tight
loop when waiting for the hardware. With this option the X driver instead
sets an event handler and waits for the hardware through the 'poll()'
system call. Default: the use of the events is disabled.
----
Before 2.6.26-rc8(? I think that's the first GIT I'd started using),
this didn't work, ending up with a black, unresponsive screen on resume.
There's a few other things you can put (or try; it depends on your
BIOS, NVidia card and Xorg version) in your xorg to speed things up or
make them more power efficient; here's what I use:
-----
Section "Device"
Identifier "Configured Video Device"
Driver "nvidia"
Option "PixmapCacheSize" "2500000"
Option "AddARGBGLXVisuals" "True"
Option "TripleBuffer" "True" # Experimental
Option "BackingStore" "True" # Experimental
Option "UseEvents" "True"
Option "Coolbits" "1"
Option "OnDemandVBlankInterrupts" "True"
EndSection
----
"AddARGBGLXVisuals", "TripleBuffer" and "BackingStore" were recommended
by some folks in the NVnews Linux forum[1], "CoolBits" allows some extra
stuff (i.e. over/underclocking) to be enabled in the NVidia Control
Panel- like "OnDemandVBlankInterrupts" which is nice for laptops, 'cause
if you have compiz' Vblank Sync" turned off as well, you generate 60 fewer
C3/C4 sleep-waking IRQ wakeups/sec, useful when running on battery.
-Kenny
[1] -
http://www.nvnews.net/vbulletin/forumdisplay.php?f=14
--
Kenneth R. Crudup Sr. SW Engineer, Scott County Consulting, Los Angeles
O: 3630 S. Sepulveda Blvd. #138, L.A., CA 90034-6809 (888) 454-8181
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