[Bug 91324] New: Sporadic hangs with moveable mouse cursor on kernel 4.0 complete hangs if using 4.1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91324

            Bug ID: 91324
           Summary: Sporadic hangs with moveable mouse cursor on kernel
                    4.0 complete hangs if using 4.1
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: oliver.pahl at googlemail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 117086
  --> https://bugs.freedesktop.org/attachment.cgi?id=117086&action=edit
lspci output, syslog output and errordum of the graphics card

I have a Thinkpad Yoga 12 with a Intel GMA HD5500. Using kernel 4.0.7 I see
sporadic hangs in Xorg where I can still move the mouse cursor and navigate to
virtual terminals. Using kernel 4.1.1 the hang occurs more frequently and the
system has to be restarted. This report is for the former, as the kernel for
the latter is not officially approved by arch and as such I wait for the
released version before filing another report. I also have to enable
i915.preliminary_hw_support=1, otherwise I am not able to switch to virtual
terminals without having serious flickering.

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