[Bug 107876] New: GPU lockup with Radeon HD 7850 in 18.1.6 driver

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107876

            Bug ID: 107876
           Summary: GPU lockup with Radeon HD 7850 in 18.1.6 driver
           Product: xorg
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
          Assignee: xorg-driver-ati at lists.x.org
          Reporter: lukasz.krotowski at gmail.com
        QA Contact: xorg-team at lists.x.org

Created attachment 141494
  --> https://bugs.freedesktop.org/attachment.cgi?id=141494&action=edit
Relevant part of kernel log

When using dual monitors (I'm not sure is correlated but first error shows on
turning second monitor with xrandr) GPU locks up with:

[  451.840071] radeon 0000:01:00.0: ring 0 stalled for more than 32210msec
[  451.840077] radeon 0000:01:00.0: ring 3 stalled for more than 32210msec
[  451.840084] radeon 0000:01:00.0: GPU lockup (current fence id
0x000000000003d501 last fence id 0x000000000003d768 on ring 3)
[  451.840088] radeon 0000:01:00.0: GPU lockup (current fence id
0x000000000001e67a last fence id 0x000000000001e74a on ring 0)

When turning on second monitor this shows up:
[drm:radeon_cs_parser_relocs [radeon]] *ERROR* gem object lookup failed 0xa
[drm:radeon_cs_ioctl [radeon]] *ERROR* Failed to parse relocation -2!

Old driver 17.2.0-0.20170513 (some git snapshot from 2017-05-13, don't know
exact commit) works fine even when used with Mesa-18.1.6 package (I've reverted
Radeon SI driver only).

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