On 26 mar 2015, at 22:00, Jakob Alvermark wrote: > On Tue, March 24, 2015 00:29, Hans Petter Selasky wrote: >> Hi, >> >> >> Without the attached kernel patch(es), Xorg starts consuming alot of CPU >> and becomes very unresponsive and unusable. >> >> Using ktrace reveals that X-org is issuing DRM_IOCTL_MODE_GETCONNECTOR >> over and over again with no apparent reason. It doesn't happen when using a >> simple window manager like blackbox. I was not able to use XFCE4 (9-stable >> userland) with 11-current kernel at all, after the latest DRM2 kernel >> updates. It worked fine before the update. >> >> I'm not sure what is causing it. Going through the new DRM2 code >> revealed that a mode sorting function did not take all parameters like >> interlaced or not into account, causing the mode list to be reshuffelled >> every time a new mode scan was done. Not sure if Xorg cares about this >> though. > > I got the same problem with XFCE4, Xorg at 100% CPU. > > Applied the patch and it works again. Interestingly, xrandr now lists a lot more available modes than before the DRM code update. I thought it was my cheap TV that only supported 1080i, but it turns out that now I can use 1080p_at_60Hz! JakobReceived on Fri Mar 27 2015 - 08:43:27 UTC
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