Public bug reported:
Dell XPS 13 Skylake laptop, only external display port is adapter is via
USB-C. When connecting any of the adapters I have (eg USB-C to VGA,
HDMI, DisplayPort, I tried all and the behavior is the same), the screen
starts flickering as if trying to detect something, and then keeps doing
this indefinitely. Mouse moves but windows don't react. Can switch to
terminal and back with Ctrl-Alt-F1 etc.
This only happens with Unity/Gnome. KDE and XFCE4 work fine, just detect
the display.
It would help greatly as a workaround if I could just disable the part
of unity/gnome which tries to detect the new display and use xrandr
instead (which, again, works fine with other desktops), but I could not
figure out which program that is, or where it writes its logfiles.
Using latest xenial packages.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: unity 7.4.0+16.04.20160401.1-0ubuntu1
Uname: Linux 4.4.6-040406-generic x86_64
.tmp.unity.support.test.0:
ApportVersion: 2.20.1-0ubuntu1
Architecture: amd64
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 Apr 5 18:06:36 2016
DistUpgraded: 2016-02-27 15:22:35,661 DEBUG enabling apt cron job
DistroCodename: xenial
DistroVariant: ubuntu
DkmsStatus:
virtualbox, 5.0.16, 4.4.0-16-generic, x86_64: installed
virtualbox, 5.0.16, 4.4.6-040406-generic, x86_64: installed
virtualbox, 5.0.16, 4.5.0-040500-generic, x86_64: installed
GraphicsCard:
Intel Corporation Sky Lake Integrated Graphics [8086:1926] (rev 0a) (prog-if
00 [VGA controller])
Subsystem: Dell Skylake Integrated Graphics [1028:0704]
InstallationDate: Installed on 2016-02-26 (39 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
Lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 0bda:5682 Realtek Semiconductor Corp.
Bus 001 Device 003: ID 04f3:20d0 Elan Microelectronics Corp.
Bus 001 Device 002: ID 0a5c:6412 Broadcom Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Dell Inc. XPS 13 9350
ProcEnviron:
LANGUAGE=en_US
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.6-040406-generic
root=/dev/mapper/ubuntu--vg-root ro quiet splash i915.enable_rc6=0 vt.handoff=7
SourcePackage: unity
UpgradeStatus: Upgraded to xenial on 2016-02-27 (38 days ago)
dmi.bios.date: 03/01/2016
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.3.3
dmi.board.name: 09JHRY
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr1.3.3:bd03/01/2016:svnDellInc.:pnXPS139350:pvr:rvnDellInc.:rn09JHRY:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.name: XPS 13 9350
dmi.sys.vendor: Dell Inc.
upstart.unity-panel-service.log: (unity-panel-service:1483):
Indicator-Appmenu-WARNING **: Already have a menu for window ID 71303388 with
path /com/canonical/menu/44000DC from :1.72, unregistering that one
version.compiz: compiz 1:0.9.12.2+16.04.20160331-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1
version.libgl1-mesa-dri: libgl1-mesa-dri 11.1.2-1ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.1.2-1ubuntu2
version.xserver-xorg-core: xserver-xorg-core 2:1.18.1-1ubuntu4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.6.1-1ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.917+git20160218-1ubuntu3
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2
xserver.bootTime: Tue Apr 5 18:03:49 2016
xserver.configfile: default
xserver.errors:
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
product id 5194
vendor SHP
xserver.version: 2:1.18.1-1ubuntu4
** Affects: unity (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug compiz-0.9 ubuntu xenial
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1566410
Title:
screen flickers indefinitely when connecting a display via USB-C
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1566410/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
