Public bug reported:
I recently upgraded my Ubuntu version from 15.10 to 16.04. I know, I
should have done this earlier, but whenever I upgrade there's always
something that doesn't work afterwards. This time it's HDMI. I first
noticed the problem when trying to use the projector at work. Weirdly,
if I go to display settings the projector is detected there it's just
that nothing shows up. Even more weirdly, using a HDMI to VGA adaptor
works fine and similarly using a HDMI to DVI adaptor with my monitor
also works fine. So I initially put it down to a fault with the cable or
the projector. But then I found the same issue with my TV using other
cables. Upon restarting my laptop, I noticed that grub displays fine. I
then tried loading up using kernel 4.2.0-42-generic and that works fine
so it seems that this is just a problem with kernel 4.4.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-104-generic 4.4.0-104.127
ProcVersionSignature: Ubuntu 4.4.0-104.127-generic 4.4.98
Uname: Linux 4.4.0-104-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.14
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: mark 1619 F.... pulseaudio
/dev/snd/controlC0: mark 1619 F.... pulseaudio
CurrentDesktop: GNOME-Flashback:Unity
Date: Sun Dec 24 18:18:00 2017
HibernationDevice: RESUME=UUID=cc779117-d74d-49bd-b047-1cc9611bd0d5
InstallationDate: Installed on 2015-09-16 (830 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
MachineType: LENOVO 20266
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-104-generic
root=UUID=d7285501-2881-4b24-a1c7-cf0692d314ff ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.4.0-104-generic N/A
linux-backports-modules-4.4.0-104-generic N/A
linux-firmware 1.157.14
SourcePackage: linux
UpgradeStatus: Upgraded to xenial on 2017-11-08 (46 days ago)
dmi.bios.date: 03/25/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: 76CN35WW
dmi.board.asset.tag: No Asset Tag
dmi.board.name: Yoga2
dmi.board.vendor: LENOVO
dmi.board.version: 31900058STD
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo Yoga 2 Pro
dmi.modalias:
dmi:bvnLENOVO:bvr76CN35WW:bd03/25/2014:svnLENOVO:pn20266:pvrLenovoYoga2Pro:rvnLENOVO:rnYoga2:rvr31900058STD:cvnLENOVO:ct10:cvrLenovoYoga2Pro:
dmi.product.name: 20266
dmi.product.version: Lenovo Yoga 2 Pro
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug hdmi kernel-bug wily xenial
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https://bugs.launchpad.net/bugs/1739973
Title:
HDMI doesn't work with kernel 4.4
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