Thanks for all your efforts. It is really fun to see such an immediate response.

Daniel Vetter daniel.vetter@ffwll.ch wrote:

On Sat, Apr 6, 2013 at 6:24 PM, George Amanakis g_amanakis@yahoo.com wrote:

...

Indeed, I set explicitly drm_kms_helper.poll=0 since 2.35.x. See here: http://souriguha.wordpress.com/2011/03/08/how-to-solve-problem-with-thinkpad...

Mouse and keyboard freezes intermittently some time after boot up. Actually the problem has to do with the GPU lagging and displaying the changes later. This results in an almost unusable desktop environment. Top will report the high CPU usage by 3-4 processes named kworker. With the drm_kms_helper.poll=0 it was until the 3.8.x kernel resolved.

Since the 3.8.x kernels the exact same problem appeared again. The problem persists with the latest 3.9-rc5 too.

Ah, so it seems to be a plain hpd irq storm (since you have massive cpu loads), not edid readings taking forever (which would still cause the mouse to lag horribly on 3.8 and earlier, but without cpu load). The edid reading issues should be fixed in 3.9. For hpd irq storms Egbert Eich from Suse is working on some patches to mitigate this. Infrastructure prep work is already merged for 3.10, hopefully we can merge the actual mitigation logic, too.

I'll try no to forget to ping you once it's merged, so that you can test it a bit.

Cheers, Daniel

Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch