Public bug reported:
On xubuntu 15.10.
Kernel version 4.2.0-18-generic x86_64 does not detect an external
monitor when it is connected via the minidisplay port. Using xrandr, I
can force output to the monitor, but the maximum resolution is 1024x768
(I think). Hardware is a Dell XPS 13.
Upgrading to the mainline kernel in the 4.3 version stream eliminates
the problem.
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: linux-image-4.2.0-18-generic 4.2.0-18.22
ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3
Uname: Linux 4.2.0-18-generic x86_64
NonfreeKernelModules: openafs
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: dabergel 1783 F.... pulseaudio
/dev/snd/controlC0: dabergel 1783 F.... pulseaudio
CurrentDesktop: XFCE
Date: Sat Nov 28 10:02:37 2015
HibernationDevice: RESUME=UUID=703c29b7-4b30-449e-8da6-1f926373c84b
InstallationDate: Installed on 2015-05-04 (207 days ago)
InstallationMedia: Xubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422.1)
MachineType: Dell Inc. XPS 13 9343
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-18-generic
root=UUID=1658dd66-913e-4ad3-8766-e821498ff4e7 ro nosmap quiet splash
vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.2.0-18-generic N/A
linux-backports-modules-4.2.0-18-generic N/A
linux-firmware 1.149.2
SourcePackage: linux
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: Upgraded to wily on 2015-10-31 (27 days ago)
dmi.bios.date: 03/25/2015
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A03
dmi.board.name: 0F5KF3
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvrA03:bd03/25/2015:svnDellInc.:pnXPS139343:pvr01:rvnDellInc.:rn0F5KF3:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.name: XPS 13 9343
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug wily
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https://bugs.launchpad.net/bugs/1520751
Title:
Kernel 4.2 does not detect external monitor
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