From: bugzilla-daemon@bugzilla.kernel.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 211807] [drm:drm_dp_mst_dpcd_read] *ERROR* mstb 000000004e6288dd port 3: DPCD read on addr 0x60 for 1 bytes NAKed
Date: Sat, 18 Sep 2021 12:56:17 +0000 [thread overview]
Message-ID: <bug-211807-2300-vziYdrH9sx@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-211807-2300@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=211807
--- Comment #10 from Nils Tonnätt (nils.tonnaett@posteo.de) ---
I patched 5.14.5. I see now difference in behavior. When the screen stays black
it often works to switch to a tty or turn off and on the display. Dmesg seems
to became a little more verbose about this:
[ 64.800268] [drm] DM_MST: stopping TM on aconnector: 000000007957d743 [id:
97]
[ 64.820206] amdgpu 0000:09:00.0: [drm] Cannot find any crtc or sizes
[ 66.970887] [drm] DM_MST: starting TM on aconnector: 000000007957d743 [id:
97]
[ 67.173165] amdgpu 0000:09:00.0: [drm] *ERROR* mstb 00000000ca721b5e port 8:
DPCD read on addr 0x60 for 1 bytes NAKed
[ 67.176906] [drm] fb mappable at 0x7C00502000
[ 67.176907] [drm] vram apper at 0x7C00000000
[ 67.176907] [drm] size 33177600
[ 67.176908] [drm] fb depth is 24
[ 67.176908] [drm] pitch is 15360
[ 67.176965] fbcon: amdgpu (fb0) is primary device
[ 67.192813] amdgpu 0000:09:00.0: [drm] *ERROR* mstb 00000000ca721b5e port 8:
DPCD read on addr 0x60 for 1 bytes NAKed
[ 67.670123] Console: switching to colour frame buffer device 480x135
[ 67.708683] amdgpu 0000:09:00.0: [drm] fb0: amdgpu frame buffer device
[ 72.960002] rfkill: input handler disabled
[ 73.139379] amdgpu 0000:09:00.0: [drm] *ERROR* mstb 00000000ca721b5e port 8:
DPCD read on addr 0x60 for 1 bytes NAKed
[ 80.216335] rfkill: input handler enabled
[ 80.534571] amdgpu 0000:09:00.0: [drm] *ERROR* mstb 00000000ca721b5e port 8:
DPCD read on addr 0x60 for 1 bytes NAKed
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next prev parent reply other threads:[~2021-09-18 12:56 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-16 20:53 [Bug 211807] New: [drm:drm_dp_mst_dpcd_read] *ERROR* mstb 000000004e6288dd port 3: DPCD read on addr 0x60 for 1 bytes NAKed bugzilla-daemon
2021-04-25 2:50 ` [Bug 211807] " bugzilla-daemon
2021-07-20 12:19 ` bugzilla-daemon
2021-08-27 22:02 ` bugzilla-daemon
2021-09-16 21:48 ` bugzilla-daemon
2021-09-16 21:49 ` bugzilla-daemon
2021-09-17 19:09 ` bugzilla-daemon
2021-09-17 19:13 ` bugzilla-daemon
2021-09-17 20:55 ` bugzilla-daemon
2021-09-18 11:59 ` bugzilla-daemon
2021-09-18 12:56 ` bugzilla-daemon [this message]
2021-10-23 21:03 ` bugzilla-daemon
2021-10-26 9:27 ` bugzilla-daemon
2021-10-26 13:09 ` bugzilla-daemon
2021-11-19 12:25 ` bugzilla-daemon
2021-11-19 14:35 ` bugzilla-daemon
2021-11-23 15:48 ` bugzilla-daemon
2021-11-24 13:22 ` bugzilla-daemon
2021-12-13 11:22 ` bugzilla-daemon
2021-12-13 11:23 ` bugzilla-daemon
2022-03-13 8:08 ` bugzilla-daemon
2022-04-07 15:48 ` bugzilla-daemon
2022-07-30 16:29 ` bugzilla-daemon
2022-08-03 15:31 ` bugzilla-daemon
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