[Bug 111535] gdm freezes when using iris driver on Intel HD520

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111535

            Bug ID: 111535
           Summary: gdm freezes when using iris driver on Intel HD520
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: All
            Status: NEW
          Severity: normal
          Priority: not set
         Component: Drivers/Gallium/Iris
          Assignee: intel-3d-bugs at lists.freedesktop.org
          Reporter: david at ixit.cz
        QA Contact: intel-3d-bugs at lists.freedesktop.org

HW: Dell 7350 Intel HD520.
SW: Gentoo, kernel 5.2.11, ~amd64, Wayland setup.

When using
MESA_LOADER_DRIVER_OVERRIDE=iris
in /etc/environment, gdm freeze. Only printed lines into logs are:

gnome-shell[932]: meta_drm_buffer_gbm_new failed: drmModeAddFB failed:
Nepřípustný argument (translated as Unacceptable argument)
gnome-shell[932]: meta_drm_buffer_gbm_new failed: drmModeAddFB failed:
Nepřípustný argument (translated as Unacceptable argument)

I tried compile git mesa with debug, but it didn't get me further.

Feel free to ask me to get specific debugging, can compile mesa/libdrm or
kernel with specific patches.

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