workaround for Nvidia vs hibernate
From
Eben King@21:1/5 to
All on Sun Sep 29 21:00:01 2024
I have an EVGA Nvidia GTX 970, Nvidia driver 470, and three monitors. If I hibernate at night and resume in the morning, the GPU gets in a state where:
temp<60C: fan speed is actually and reported 0
temp>60C: fan speed is actually 0, but is reported as crazy non-contiguous values
Which means I can only run two monitors (the third has to be disabled) and I can't do anything that puts too much load on the CPU, lest the GPU overheat
and effectively crash the OS. I put some GPU stats in the top center panel
so I could keep an eye on it.
Anyhow, if I use ddccontrol to turn off and on each monitor, that forces the GPU to straighten up and fly right. It hangs out at temp=63C and fan=8-9%.
I'm not sure of the actual minimum I have to do (maybe one monitor is
enough? Maybe a state lower than DPMS 5 will work?) because I just figured this out today. But maybe it can help someone else.
I wrote a script (/bin/sh) a while back that resets the monitors to the way
I like them, and added this to it:
DDC=ddccontrol
# default
DPMS=no
while [ $# -gt 0 ] ; do
case "$1" in
-dpms|-DPMS) DPMS=yes
shift ;;
*) echo "Unknown option '$1'"
exit 1
esac
done
if [ $DPMS = yes ] ; then
# toggles each detected monitor off and on using DPMS
devices="$("$DDC" -p 2>/dev/null | sed -n /Detected/,/^$/p | grep '^ -
D' | cut -f 4 -d ' ')"
for device in $devices ; do
echo '-=>' $device '<=-'
"$DDC" -r 0xd6 -w 5 "$device" # off
"$DDC" -r 0xd6 -w 1 "$device" # on
done
exit
fi
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