From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 107393] 4.18.0-rc6 amdgpu framebuffer problems with DisplayPort
Date: Fri, 27 Jul 2018 07:48:45 +0000 [thread overview]
Message-ID: <bug-107393-502@http.bugs.freedesktop.org/> (raw)
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https://bugs.freedesktop.org/show_bug.cgi?id=107393
Bug ID: 107393
Summary: 4.18.0-rc6 amdgpu framebuffer problems with
DisplayPort
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: lkd-fdo@sky-haven.net
Created attachment 140848
--> https://bugs.freedesktop.org/attachment.cgi?id=140848&action=edit
combined kernel dmesg for two boot sessions, one in 4.17.0 and the other in
4.18.0-rc6
On kernel 4.17.0, amdgpudrmfb functions correctly; taking the fb from efifb
On kernel 4.18.0-rc6 (and previous), the framebuffer proper doesn't start;
monitor doesn't get a valid display signal. If I log in and blind-start a
Wayland compositor (sway in my case), the display gets a desktop and things
work normally. Once I exit out back to FB, the display is blanked.
Everything works normally if I connect the monitor with HDMI instead.
This was a problem with 4.18.0-rc5 as well. I was pointed to the patch at
https://lists.freedesktop.org/archives/amd-gfx/2018-July/023920.html and
applied it to 4.18.0-rc5, but it had no effect on behavior.
GPU: Vega64
Monitor: Acer XR341CK
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next reply other threads:[~2018-07-27 7:48 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-27 7:48 bugzilla-daemon [this message]
2018-11-25 19:21 ` [Bug 107393] 4.18.0-rc6 amdgpu framebuffer problems with DisplayPort bugzilla-daemon
2019-11-19 8:45 ` bugzilla-daemon
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