[Bug 78238] New: GPU lockup on opening new tab in Chromium

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=78238

          Priority: medium
            Bug ID: 78238
          Assignee: dri-devel at lists.freedesktop.org
           Summary: GPU lockup on opening new tab in Chromium
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: russianneuromancer at ya.ru
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Radeon
           Product: DRI

Created attachment 98395
  --> https://bugs.freedesktop.org/attachment.cgi?id=98395&action=edit
dmesg

If GPU blacklist is disabled in Chromium (on chrome://flags; so hardware
accelerated rendering become enabled, judging from chrome://gpu) GPU sometimes
lockup on just opening new tab (at least one time per day). After lockup I
observe same behaviour like in Bug 77892 - reset happens but X is unresponsive
except mouse.

Radeon HD 6620G, Kubuntu 14.04 x86_64, Linux 3.15rc3, X.Org Server 1.15.1,
libdrm 2.4.54+git1405030630.5126fc, Mesa 10.3~git1405030730.64c467, radeon
driver 7.3.99+git1405030730.be1469.

As I remember, this behaviour (GPU hang on opening new tab) introduced since
Linux 3.15.

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