From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 107456] WARNING: CPU: 11 PID: 1137 at drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:88 dm_dp_aux_transfer+0xa5/0xc0 [amdgpu]
Date: Thu, 02 Aug 2018 16:55:51 +0000 [thread overview]
Message-ID: <bug-107456-502@http.bugs.freedesktop.org/> (raw)
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https://bugs.freedesktop.org/show_bug.cgi?id=107456
Bug ID: 107456
Summary: WARNING: CPU: 11 PID: 1137 at
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu
_dm_mst_types.c:88 dm_dp_aux_transfer+0xa5/0xc0
[amdgpu]
Product: DRI
Version: unspecified
Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: DRM/AMDgpu
Assignee: dri-devel@lists.freedesktop.org
Reporter: marc@dragonfly.plus.com
Created attachment 140936
--> https://bugs.freedesktop.org/attachment.cgi?id=140936&action=edit
dmesg output
I see the following warning during boot with Linux kernel 4.18.0-rc6 & 4.17.10:
root@deepthought:~# dmesg | grep WARN
[ 9.346100] WARNING: CPU: 11 PID: 1137 at
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:88
dm_dp_aux_transfer+0xa5/0xc0 [amdgpu]
[ 9.346162] WARNING: CPU: 14 PID: 1139 at
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:88
dm_dp_aux_transfer+0xa5/0xc0 [amdgpu]
Hardware is Ryzen 7 2700x, Sapphire Technology Radeon RX 480, IIyama ProLite
XB2380HS connected via DVI.
It looks like "dm_dp_aux_transfer" is used to setup DisplayPort, using "struct
drm_dp_aux_msg — DisplayPort AUX channel transaction". Now, with my hardware I
don't have any monitors connected via DisplayPort. Is that relevant?
I patched in a "printk("msg->size = %d\n", msg->size);" and it displays the
result twice, which is curious.
# dmesg | grep -i "msg->size"
[ 9.469511] msg->size = -5
[ 9.469803] msg->size = -5
Anyway, full "dmesg" attached.
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next reply other threads:[~2018-08-02 16:55 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-02 16:55 bugzilla-daemon [this message]
2018-09-25 11:27 ` [Bug 107456] WARNING: CPU: 11 PID: 1137 at drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:88 dm_dp_aux_transfer+0xa5/0xc0 [amdgpu] bugzilla-daemon
2019-11-20 7:50 ` bugzilla-daemon
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