[Bug 98702] New: OpenCL applications freeze the desktop

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98702

            Bug ID: 98702
           Summary: OpenCL applications freeze the desktop
           Product: xorg
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: blocker
          Priority: medium
         Component: Driver/intel
          Assignee: chris at chris-wilson.co.uk
          Reporter: t.artem at mailcity.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org

Hardware: laptop with Intel Core i5 6200U CPU
Software: Fedora 24 64 + all updates + kernel 4.8.6

Whenever I run any OpenCL applications my entire desktop almost completely
freezes: the mouse cursor barely moves, I cannot type anything, there's a huge
delay whenever I try to interact with anything. In short the desktop becomes
unusable.

This happens for instance when running:

$ clpeak --all-tests

for most tests CPU usage remains negligible.

I have verified the issue with both Intel proprietary OpenCL drivers (  Intel
intel-opencl-r3.0 (SRB3) Linux driver package ) and Beignet open source
drivers.

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