Public bug reported:
I have an external 1920x1080 monitor attached to my laptop, which has a
3840x2160 display. When I run them both at their native resolutions, the
laptop display only works in the top quarter of the desktop, except for
the unity launcher and unity top bar. Anything that leaves the top
quarter leaves trails and flickers awfully (see attached image, which
shows everything except the flickering).
I also tried it with the laptop on 2560x1440 (I had to add it manually
because of a a separate bug where the modesetting driver limits the max
vertical refresh frequency of default modelines to 60 Hz) and exactly
the same thing happens (although the geometry isn't one quarter any
more).
It works fine with the intel driver, but not the modesetting driver, so
it seems to be an xserver issue rather than a unity issue. It also works
fine if I set both monitors to 1920x1080.
The modesetting driver seems to struggle with setting resolutions. When
I first log into the desktop, it takes a good 5 seconds longer than the
intel driver to set up the screens, and for a while it looks like I have
a 640x480 screen (judging by the huge mouse pointer I get). Given this
bug and the vertical refresh bug, maybe yakkety shouldn't default to the
modesetting driver?
ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: xserver-xorg 1:7.7+13ubuntu3
Uname: Linux 4.7.2-040702-generic x86_64
.tmp.unity_support_test.0:
ApportVersion: 2.20.3-0ubuntu7
Architecture: amd64
BootLog:
CompizPlugins: No value set for
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Tue Aug 30 19:26:06 2016
DistUpgraded: 2016-07-25 02:38:44,004 DEBUG Running PostInstallScript:
'./xorg_fix_proprietary.py'
DistroCodename: yakkety
DistroVariant: ubuntu
DkmsStatus:
bbswitch, 0.8, 4.4.0-9136-generic, x86_64: installed
bbswitch, 0.8, 4.7.2-040702-generic, x86_64: installed
nvidia, 367-367.44, 4.4.0-9136-generic, x86_64: installed
nvidia, 367-367.44, 4.7.2-040702-generic, x86_64: installed
ExtraDebuggingInterest: Yes
GraphicsCard:
Intel Corporation HD Graphics 530 [8086:191b] (rev 06) (prog-if 00 [VGA
controller])
Subsystem: Dell HD Graphics 530 [1028:06e4]
InstallationDate: Installed on 2016-07-04 (57 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
JournalErrors:
Error: command ['journalctl', '-b', '--priority=warning', '--lines=1000']
failed with exit code 1: Hint: You are currently not seeing messages from other
users and the system.
Users in the 'systemd-journal' group can see all messages. Pass -q to
turn off this notice.
No journal files were opened due to insufficient permissions.
MachineType: Dell Inc. XPS 15 9550
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.7.2-040702-generic
root=UUID=8de7ebec-48db-48b6-9eb9-fafdee4eb7d6 ro rootflags=subvol=@ quiet
splash nogpumanager vt.handoff=7
SourcePackage: xorg
UpgradeStatus: Upgraded to yakkety on 2016-07-24 (36 days ago)
dmi.bios.date: 04/07/2016
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 01.02.00
dmi.board.name: 0N7TVV
dmi.board.vendor: Dell Inc.
dmi.board.version: A01
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr01.02.00:bd04/07/2016:svnDellInc.:pnXPS159550:pvr:rvnDellInc.:rn0N7TVV:rvrA01:cvnDellInc.:ct9:cvr:
dmi.product.name: XPS 15 9550
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.13.0+16.10.20160818.2-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.70-1
version.libgl1-mesa-dri: libgl1-mesa-dri 12.0.1-3ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 12.0.1-3ubuntu2
version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-1ubuntu4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.2-1ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.917+git20160706-1ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug compiz-0.9 reproducible ubuntu yakkety
** Attachment added: "hires with modesetting.png"
https://bugs.launchpad.net/bugs/1618423/+attachment/4730766/+files/hires%20with%20modesetting.png
--
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1618423
Title:
Modesetting driver cannot handle different display resolutions for two
monitors
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1618423/+subscriptions
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