Public bug reported:
When resuming from hibernation (to RAM) on my Lenovo Thinkpad X230
and/or switching to an external display connected over HDMI, the desktop
becomes unresponsive: Every few seconds, the output will freeze for half
a second or so. This is most noticeable when running fast terminal
outputs or dragging windows. Restarting the X server makes the problem
go away until the next suspend or output switch.
Unfortunately, I have not been able to narrow down the exact
circumstances that cause it to happen, but I've never seen it on the
internal LVDS-connected screen of the laptop, and never directly after
starting X.
I'm suspecting this is related to SNA; I'll try using UXA for a few days
and check if the problem manifests again.
Ubuntu version: 13.04
Package version: 2:2.21.6-0ubuntu4
All X-related settings are unmodified from the distribution defaults (RC6
enabled etc.)
** Affects: xserver-xorg-video-intel (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1178218
Title:
Video output judders after suspend
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