[Bug 104306] Mesa 17.3 breaks Firefox and other Xwayland apps on AMD HD7750

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104306

            Bug ID: 104306
           Summary: Mesa 17.3 breaks Firefox and other Xwayland apps on
                    AMD HD7750
           Product: Mesa
           Version: 17.3
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: mesabug11 at p33.org
        QA Contact: dri-devel at lists.freedesktop.org

On latest stable Archlinux with AMD HD7750, Mesa 17.3 breaks Firefox,
Libreoffice, mpv with X11 backend and Chromium (when running WebGL).

Launching firefox or glxinfo from command line results in no response and no
crashes. There are no errors in dmesg or journalctl, except Probe failed with
amdkfd, but blacklisting amdkfd doesn't solve the issue. Using strace on
firefox there are system interrupted notices. Chromium works, but opening any
WebGL page freezes Chromium. mpv with X11 backend shows Bad Drawable, server
failed to allocate resource.

Downgrading to mesa 17.2.6 solves the issue.

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