screen flickers indefinitely when connecting a display via USB-C
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Confirmed
|
Medium
|
Unassigned |
Bug Description
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.
Uname: Linux 4.4.6-040406-
.tmp.unity.
ApportVersion: 2.20.1-0ubuntu1
Architecture: amd64
CompizPlugins: No value set for `/apps/
CompositorRunning: compiz
CompositorUnred
CompositorUnred
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-
virtualbox, 5.0.16, 4.5.0-040500-
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_
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=
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.
dmi.product.name: XPS 13 9350
dmi.sys.vendor: Dell Inc.
upstart.
version.compiz: compiz 1:0.9.12.
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1
version.
version.
version.
version.
version.
version.
version.
version.
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
no longer affects: | linux |
no longer affects: | unity (Ubuntu) |
Changed in linux (Ubuntu): | |
importance: | Undecided → Medium |
This change was made by a bot.