Sander Sweers wrote: > On Wed, 2006-08-16 at 12:13 +0200, Simen Thoresen wrote: > [..] >> The core functionality of this powermanagement feature is compiled into >> the kernel (or as a module). On my kernel (2.6.16.6), the feature is >> built as >> CONFIG_X86_POWERNOW_K8=m >> CONFIG_X86_POWERNOW_K8_ACPI=y >> >> ...for my Athlon64 cpu, in i386 mode - I assume it will be similar on >> your system. >> >> On my system (no errors for a week or so), I am not only not running the >> userspace manager, but I am also /not/ loading the module. > > You can control the CPUFREQ governors with sysfs. Try modprobing the > cpufreq_ondemand and echo ondemand to the scaling governor. "echo > ondemand > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor. Echo > performance to make the cpu stay at maximum performance. > > Powernow will not only lower the cpu's frequentie but also the voltage. > And as the memory controller in on the cpu with AMD64 this might cause > the dma errors. > > Not sure about the above but if all the people with dma errors have an > AMD64 this could be the issue.
Interesting. I have an AMD64, and I did (do?) have the DMA problems. I've been running with the PIO mode patch for some time now, but in the next few days I hope to do some testing with your above suggestion. I did have cpuspeed turned on. My machine is running an FC4 kernel. Kristo _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users
