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From: bugzilla-daemon@bugzilla.kernel.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 208947] amdgpu DisplayPort won't recognize all display modes after 5.9 merges
Date: Thu, 20 Aug 2020 23:31:05 +0000	[thread overview]
Message-ID: <bug-208947-2300-b8q5B5yqnP@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-208947-2300@https.bugzilla.kernel.org/>

https://bugzilla.kernel.org/show_bug.cgi?id=208947

--- Comment #13 from Coleman Kane (ckane@colemankane.org) ---
Interestingly enough, the description of a problem attempting to be addressed
with this fix sounds similar to behavior I experience with this system:

Namely, the Radeon RX 580M connected over DisplayPort advertises 3840x2160@60Hz
but I've never gotten the card to successfully link up to the monitor at that
resolution. In console mode, this results in the "black screen" where only the
built-in display for the laptop works and the external monitor just stays black
(falls asleep). In Xorg, if I set it to 3840x2160@29.97Hz, it works however.
Additionally, setting the higher resolutions can take a noticeable moment to
display.

I have another laptop with another graphics card and was able to test that the
display does work at 3840x2160@60Hz.

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  parent reply	other threads:[~2020-08-20 23:31 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-17 21:02 [Bug 208947] New: amdgpu DisplayPort won't recognize all display modes after 5.9 merges bugzilla-daemon
2020-08-18  0:19 ` [Bug 208947] " bugzilla-daemon
2020-08-18 13:28 ` bugzilla-daemon
2020-08-18 18:22 ` bugzilla-daemon
2020-08-18 18:24 ` bugzilla-daemon
2020-08-18 18:27 ` bugzilla-daemon
2020-08-18 18:29 ` bugzilla-daemon
2020-08-18 18:30 ` bugzilla-daemon
2020-08-18 23:30 ` bugzilla-daemon
2020-08-19 22:22 ` bugzilla-daemon
2020-08-19 22:53 ` bugzilla-daemon
2020-08-20  3:20 ` bugzilla-daemon
2020-08-20  5:01 ` bugzilla-daemon
2020-08-20 23:22 ` bugzilla-daemon
2020-08-20 23:31 ` bugzilla-daemon [this message]
2020-08-21  2:18 ` bugzilla-daemon
2020-08-21  2:51 ` bugzilla-daemon
2020-08-21 19:52 ` bugzilla-daemon
2020-08-22 22:52 ` bugzilla-daemon
2021-01-02  3:22 ` bugzilla-daemon
2021-01-03  8:59 ` bugzilla-daemon
2021-01-03  9:05 ` bugzilla-daemon
2021-01-10 22:59 ` bugzilla-daemon

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