> -----Original Message----- > From: Daniel Vetter [mailto:daniel.vetter@xxxxxxxx] On Behalf Of Daniel Vetter > On Tue, Apr 23, 2013 at 01:16:16AM +0000, Mike Verstegen wrote: > > I'm troubleshooting an interesting problem where the > > i915_hotplug_work_func is eating up a lot of time in a couple of > > kworker threads. The interesting part of the problem is that this only > > happens with one particular model of monitor which I haven't gotten to > > the bottom of yet. But that's not the problem I'm trying to resolve. > > This should be fixed in latest drm-next. Can you please test that? > I'd be glad to test, but that may be a bit over my skill level. How could I help with testing drm-next? In my original message, I forgot to include that this is a Centos 6.4 system with a 3.5.3 kernel. > > One band-aid for this trouble is to disable the polling in the > > irq_event # echo "N" > /sys/module/drm_kms_helper/parameters/poll > > > > That quiets down the kworker threads. Good > > > > To make this survive across boots, I added the following to > > /etc/modprobe/local.conf options drm_kms_helper poll=N > > > > On reboot, the poll is still enabled > > [root@localhost ~]# cat /sys/module/drm_kms_helper/parameters/poll > > Y > > Questions: > > - Am I using "options drm_kms_helper poll=N" correctly > > - Is there a better way to have this option set to false on initialization? > > You probably need to rebuild your initrd with your distro tools since > drm_kms_helper is loaded really early. Great suggestion and a good learning point for me. I rebuilt the initramfs and the option is now recognized at boot. Thanks Mike _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
