This bug affects the 4.4 kernel, including the xenial kernel and the lts-xenial kernel in trusty.
The linked freedesktop bug report mentions that the bug was fixed in the 4.5 kernel with the following commit, http://kernel.ubuntu.com/git/ubuntu/linux.git/commit/?id=92826fcdfc147a7d16766e987c12a9dfe1860c3f The commit was not backported to the 4.4 kernel, and is not present in the xenial kernel. I initially tested the 4.5 mainline kernel and found that it does fix the bug. I then attempted to apply the aforementioned commit to the xenial kernel and found that it does not apply cleanly. By including two earlier patches I was able to get it to apply (with minor porting). But the resultant kernel did not fix the bug. Details: The two earlier patches are: drm/i915/ivb: Move WaCxSRDisabledForSpriteScaling w/a to atomic check, d21fbe87ce18297af0a9b7cc0cd545fd9ac28d33 drm/i915: Move disable_cxsr to the crtc_state, ab1d3a0e5a44f5b1a8d1f811e925c8519b56fba4 ** Patch removed: "drm/i915: Calculate watermark related members in the crtc_state, v4." https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1542939/+attachment/4639342/+files/patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1542939 Title: system freeze after vt switching To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1542939/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
