[Bug 97460] [drm][amdgpu][CIK] drm_sysfs_connector - BUG: unable to handle kernel NULL pointer dereference at 0000000000000038

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97460

            Bug ID: 97460
           Summary: [drm][amdgpu][CIK] drm_sysfs_connector - BUG: unable
                    to handle kernel NULL pointer dereference at
                    0000000000000038
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: shawn.starr at rogers.com

Created attachment 125990
  --> https://bugs.freedesktop.org/attachment.cgi?id=125990&action=edit
Dmesg of kernel bootup - 4.7.0 kernel

When trying to enable Switchable Graphics, I am unable to bootup.

With 4.7.0 it booted but no X display could start
With 4.8-rcX it deadlocks on bootup now.

1) If the LCD (LVDS) display lid is open, no such kernel panic message is
displayed and deadlocks bootup.
2) It the lid is closed, a panic message is shown (and deadlocks bootup).

Trying to enable PRIME on AMDGPU with CIK experimental enabled fails. attached
to this BZ is dmesg of oops from 4.7.0 kernel, the stack is the same for
4.8-rcX.

PRIME has never worked for me on AMDGPU it has worked on regular radeon
however.

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