From: bugzilla-daemon@bugzilla.kernel.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 200695] Blank screen on RX 580 with amdgpu.dc=1 enabled (no displays detected)
Date: Tue, 16 Jun 2020 23:39:32 +0000 [thread overview]
Message-ID: <bug-200695-2300-hlnXkbEimI@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-200695-2300@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=200695
Lukas Fink (lukas.fink1@gmail.com) changed:
What |Removed |Added
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CC| |lukas.fink1@gmail.com
--- Comment #43 from Lukas Fink (lukas.fink1@gmail.com) ---
(In reply to babgozd from comment #38)
> I am following this thread since it has created. My R9 380 with DVI-I output
> is connected to my VGA monitor with DVI-I male to VGA female adapter and I
> am getting black/blank screen while booting with amdgpu.dc=1 which is
> default since kernel 4.17. It is fine with amdgpu.dc=0. I can provide logs
> too if any kernel contributor wants to investigate the problem any further.
To me it seems, as if the DVI-I port is somehow misdetected/misconfigured as a
DVI-D port. With dc=0 I find the files "card1-DVI-I-1" and "card1-DVI-D-1" in
"/sys/class/drm/card1". With dc=1 there are "card1-DVI-D-1" and
"card1-DVI-D-2".
It appears to correctly negotiate resolution and refresh rate over DDC, but
because it only outputs the digital signal, a display connected over VGA
receives nothing and turns off.
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next prev parent reply other threads:[~2020-06-16 23:39 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-31 18:32 [Bug 200695] New: Blank screen on RX 580 with amdgpu.dc=1 enabled (no displays detected) bugzilla-daemon
2018-07-31 18:33 ` [Bug 200695] " bugzilla-daemon
2018-07-31 18:34 ` bugzilla-daemon
2018-07-31 18:37 ` bugzilla-daemon
2018-07-31 18:37 ` bugzilla-daemon
2018-07-31 18:38 ` bugzilla-daemon
2018-08-28 15:40 ` bugzilla-daemon
2018-08-28 15:42 ` bugzilla-daemon
2018-09-06 6:51 ` bugzilla-daemon
2018-09-10 13:45 ` bugzilla-daemon
2018-09-17 17:46 ` bugzilla-daemon
2018-09-17 18:09 ` bugzilla-daemon
2018-09-18 2:10 ` bugzilla-daemon
2018-09-18 13:43 ` bugzilla-daemon
2018-09-18 15:02 ` bugzilla-daemon
2018-10-01 17:30 ` bugzilla-daemon
2018-10-10 21:16 ` bugzilla-daemon
2018-10-22 18:52 ` bugzilla-daemon
2018-11-06 16:13 ` bugzilla-daemon
2018-11-13 19:54 ` bugzilla-daemon
2018-11-19 18:15 ` bugzilla-daemon
2018-12-04 23:12 ` bugzilla-daemon
2018-12-28 6:07 ` bugzilla-daemon
2019-01-12 11:18 ` bugzilla-daemon
2019-01-13 19:35 ` bugzilla-daemon
2019-02-25 17:51 ` bugzilla-daemon
2019-02-26 16:43 ` bugzilla-daemon
2019-02-27 12:42 ` bugzilla-daemon
2019-03-07 15:42 ` bugzilla-daemon
2019-03-07 16:26 ` bugzilla-daemon
2019-03-07 16:57 ` bugzilla-daemon
2019-04-02 16:38 ` bugzilla-daemon
2019-04-02 16:39 ` bugzilla-daemon
2019-09-20 11:22 ` bugzilla-daemon
2019-11-05 14:07 ` bugzilla-daemon
2019-12-16 21:43 ` bugzilla-daemon
2019-12-16 23:52 ` bugzilla-daemon
2020-02-15 14:42 ` bugzilla-daemon
2020-02-16 13:47 ` bugzilla-daemon
2020-02-16 21:12 ` bugzilla-daemon
2020-05-08 10:55 ` bugzilla-daemon
2020-05-08 15:12 ` bugzilla-daemon
2020-05-08 18:20 ` bugzilla-daemon
2020-05-30 19:22 ` bugzilla-daemon
2020-06-16 23:39 ` bugzilla-daemon [this message]
2020-06-17 2:24 ` bugzilla-daemon
2020-06-17 3:11 ` bugzilla-daemon
2020-06-28 9:25 ` bugzilla-daemon
2020-06-28 9:26 ` bugzilla-daemon
2020-06-28 9:27 ` bugzilla-daemon
2021-04-06 7:51 ` bugzilla-daemon
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