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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [drm][amdgpu][CIK] drm_sysfs_connector - BUG: unable to handle kernel NULL pointer dereference at 0000000000000038"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97460#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [drm][amdgpu][CIK] drm_sysfs_connector - BUG: unable to handle kernel NULL pointer dereference at 0000000000000038"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97460">bug 97460</a>
from <span class="vcard"><a class="email" href="mailto:shawn.starr@rogers.com" title="Shawn Starr <shawn.starr@rogers.com>"> <span class="fn">Shawn Starr</span></a>
</span></b>
<pre>Adding some debug when not using Switchable Graphics:
[ 10.048669] [drm] amdgpu_connector_add(): dp bridge encoder name: 0x1e
[ 10.048672] [drm] amdgpu_connector_add() no dp_bridge: connecter_type found:
7
[ 10.048684] [drm] forcing LVDS-1 connector OFF
[ 10.048721] [drm] amdgpu_connector_add(): dp bridge encoder name: 0x20
[ 10.048724] [drm] amdgpu_connector_add() no dp_bridge: connecter_type found:
10
[ 10.048811] [drm] amdgpu_connector_add(): dp bridge encoder name: 0x20
[ 10.048814] [drm] amdgpu_connector_add() no dp_bridge: connecter_type found:
10
[ 10.048877] [drm] amdgpu_connector_add(): dp bridge encoder name: 0x21
[ 10.048880] [drm] amdgpu_connector_add() no dp_bridge: connecter_type found:
10
[ 10.048933] [drm] amdgpu_connector_add(): dp bridge encoder name: 0x15
[ 10.048937] [drm] amdgpu_connector_add() no dp_bridge: connecter_type found:
1
When using Switchable Graphics:
[ X.XXXXXXX] [drm] amdgpu_connector_add(): dp bridge encoder name: 0x1e
[ X.XXXXXXX] [drm] amdgpu_connector_add() no dp_bridge: connecter_type found:
-16345243
Then we panic/deadlock.
amdgpu_atombios_get_connector_info_from_object_table() vs
radeon_get_atom_connector_info_from_object_table()
Perhaps there's a bug in the parsing? This works fine with radeon.ko.</pre>
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