One black screen of two when both on 1080p60
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Confirmed
|
High
|
Unassigned | ||
Vivid |
Won't Fix
|
High
|
Unassigned |
Bug Description
One display turns off when both outputs are set to 1920x1080@60.0. They both still work separately on that rate.
Forcing the one to "1920x1080@59.9" is functioning as a work-around.
The good kernel version was linux_3.19.0-21.21.
This Problem occurred in kernel linux_3.19.0-22.22 and linux_3.19.0-23.24.
GPU is: Radeon HD 6670 using the radeon open source driver.
ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: linux-image-
ProcVersionSign
Uname: Linux 3.19.0-23-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
/dev/snd/
CurrentDesktop: Unity
Date: Thu Jul 23 15:12:26 2015
HibernationDevice: RESUME=
InstallationDate: Installed on 2012-04-11 (1198 days ago)
InstallationMedia: Xubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
IwConfig:
eth0 no wireless extensions.
lo no wireless extensions.
MachineType: Dell Inc. OptiPlex 755
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=
RelatedPackageV
linux-
linux-
linux-firmware 1.143.2
RfKill:
SourcePackage: linux
UpgradeStatus: Upgraded to vivid on 2015-04-27 (87 days ago)
dmi.bios.date: 04/30/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A10
dmi.board.name: 0GM819
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 6
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.
dmi.product.name: OptiPlex 755
dmi.sys.vendor: Dell Inc.
-----
(From TJ):
$ xrandr -q
Screen 0: minimum 320 x 200, current 3600 x 1080, maximum 16384 x 16384
HDMI-0 connected primary 1680x1050+0+0 (normal left inverted right x axis y axis) 477mm x 268mm
1920x1080 60.0 *+ 50.0 59.9 60.0
1920x1080i 60.1 50.0 60.0
1600x1200 60.0
1680x1050 59.9
1280x1024 75.0 60.0
1440x900 59.9
1280x960 60.0
1366x768 59.8
1152x864 75.0
1280x720 60.0 50.0 59.9
1024x768 75.1 70.1 60.0
832x624 74.6
800x600 72.2 75.0 60.3 56.2
720x576 50.0
720x480 60.0 59.9
640x480 75.0 72.8 66.7 60.0 59.9
720x400 70.1
DVI-0 connected 1920x1080+1680+0 (normal left inverted right x axis y axis) 477mm x 268mm
1920x1080 60.0*+
1280x1024 75.0 60.0
1152x864 75.0
1024x768 75.1 60.0
800x600 75.0 60.3
640x480 75.0 60.0
720x400 70.1
VGA-0 disconnected (normal left inverted right x axis y axis)
# workaround
$ xrandr --output HDMI-0 --mode 1920x1080 --rate 59.9
description: | updated |
Changed in linux (Ubuntu): | |
status: | New → Confirmed |
importance: | Undecided → High |
description: | updated |
Changed in linux (Ubuntu Vivid): | |
status: | New → Confirmed |
importance: | Undecided → High |
tags: | added: kernel-da-key |
tags: | added: kernel-fixed-upstream |
tags: | added: bios-outdated-a22 |
Since the regression started in 3.19.0-22.22 (https:/ /launchpad. net/ubuntu/ +source/ linux/3. 19.0-22. 22), it looks like its a stable update regression. I noticed in the upstream stable 3.18.18 release a few radeon commits were reverted that we haven't reverted yet
Revert "drm/radeon: don't share plls if monitors differ in audio support"
Revert "drm/radeon: adjust pll when audio is not enabled"
https:/ /lkml.org/ lkml/2015/ 7/11/94