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From: bugzilla-daemon@bugzilla.kernel.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 200531] amdgpu: *ERROR* REG_WAIT timeout when a display is put to sleep
Date: Sun, 22 Jul 2018 13:16:24 +0000	[thread overview]
Message-ID: <bug-200531-2300-SGlKx3R7qa@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-200531-2300@https.bugzilla.kernel.org/>

https://bugzilla.kernel.org/show_bug.cgi?id=200531

--- Comment #4 from Aleksandr Mezin (mezin.alexander@gmail.com) ---
After more testing:
1. "unable to handle kernel NULL pointer dereference" doesn't happen with
4.18-rc5
2. GUI/GPU driver still freezes at some point. Usually I need to leave the
system turned on but with monitors in standby. Only "REG_WAIT timeout" errors
in dmesg.
3. "REG_WAIT timeout" only happens with 2 monitors connected. Dell P2415Q and
LG 27UD69P, both connected through DisplayPort

How to reproduce "REG_WAIT timeout":
1) `xset dpms force off`
2) Wait for both monitors to turn off (backlight should turn off, "no signal"
messages disappear)
3) "REG_WAIT timeout" will happen when you'll press a key/move the mouse - when
the monitors are waking up (I've checked dmesg over SSH from another machine).

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  parent reply	other threads:[~2018-07-22 13:16 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-18  0:41 [Bug 200531] New: amdgpu: *ERROR* REG_WAIT timeout when a display is put to sleep bugzilla-daemon
2018-07-18  0:41 ` [Bug 200531] " bugzilla-daemon
2018-07-18  0:56 ` bugzilla-daemon
2018-07-18  0:58 ` bugzilla-daemon
2018-07-18  7:36 ` bugzilla-daemon
2018-07-18  7:36 ` bugzilla-daemon
2018-07-22 13:16 ` bugzilla-daemon [this message]
2018-07-22 16:24 ` bugzilla-daemon
2018-08-26  0:53 ` bugzilla-daemon
2018-09-03  5:20 ` bugzilla-daemon
2018-09-04 14:35 ` bugzilla-daemon
2018-09-05  9:14 ` bugzilla-daemon
2018-09-11 14:15 ` bugzilla-daemon
2018-12-10  2:44 ` bugzilla-daemon
2018-12-31 15:16 ` bugzilla-daemon
2025-02-05 11:09 ` bugzilla-daemon
2025-05-26 13:15 ` bugzilla-daemon
2025-05-27 21:39 ` bugzilla-daemon

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