Hello, I'm back home now. I just tried disabling CPU Frequency scaling again. The machine is running now for about 3 hours. I haven't seen any DMA error yet but I can see already artefacts and corrupted mpg video. Usually this happens just before the DMA errors come up. Do you have this behavior on your setups? Could someone with a working setup please attach or upload a kernel config file? I hope I can find out some more settings that cause this problem.
Michael Am 20.08.2006 um 21:39 schrieb John Drescher: >> I've finally managed to reproduce the DMA error reliably and quickly >> using the following shell script on my dual AMD: >> >> #!/bin/sh >> cd /sys/devices/system/cpu >> echo userspace >cpu0/cpufreq/scaling_governor >> echo userspace >cpu1/cpufreq/scaling_governor >> while true; do \ >> echo 2200000 >cpu0/cpufreq/scaling_setspeed; \ >> echo 2200000 >cpu1/cpufreq/scaling_setspeed; \ >> sleep 0.3; \ >> echo 1000000 >cpu0/cpufreq/scaling_setspeed; \ >> echo 1000000 >cpu1/cpufreq/scaling_setspeed; \ >> sleep 0.3; \ >> done >> >> For some reason powernowd triggers the bug only very rarely, but this >> shell script is very effective. >> > Thanks for the script. I got "dmabug.sh: line 9: > cpu0/cpufreq/scaling_setspeed: Permission denied" errors when I tried > that as root so I guess I'll have to dig a little deaper into my > kernel config to see why this is happening. > > John > > _______________________________________________ > ivtv-users mailing list > [email protected] > http://ivtvdriver.org/mailman/listinfo/ivtv-users > _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users
