As told in the description, with kernel 4.4.0-112-generic the outputs are
recognized and work fine.
The next kernel I installed was 4.4.0-116-generic with which the bug appears.
The bug is not fixed in v4.16-rc4.
** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1753050
Title:
Does not recognize external monitor
Status in linux package in Ubuntu:
Confirmed
Bug description:
Neither HDMI (digital) nor VGA (analog) output work with the kernel.
With 4.4.0-112-generic they work fine.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-116-generic 4.4.0-116.140
ProcVersionSignature: Ubuntu 4.4.0-116.140-generic 4.4.98
Uname: Linux 4.4.0-116-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: jarnos 1778 F.... pulseaudio
CurrentDesktop: XFCE
Date: Sat Mar 3 09:35:16 2018
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=19c075ab-2b2e-4285-a3a5-dbd15ee7b31e
InstallationDate: Installed on 2015-11-21 (832 days ago)
InstallationMedia: Xubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
ProcFB:
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-116-generic
root=UUID=bdc3be24-dee9-4ead-bca0-c9b1e45a87e5 ro persistent quiet splash
RelatedPackageVersions:
linux-restricted-modules-4.4.0-116-generic N/A
linux-backports-modules-4.4.0-116-generic N/A
linux-firmware 1.157.17
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/01/2011
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68MVD Ver. F.20
dmi.board.name: 30C5
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 71.36
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias:
dmi:bvnHewlett-Packard:bvr68MVDVer.F.20:bd12/01/2011:svnHewlett-Packard:pn:pvrF.20:rvnHewlett-Packard:rn30C5:rvrKBCVersion71.36:cvnHewlett-Packard:ct10:cvr:
dmi.product.version: F.20
dmi.sys.vendor: Hewlett-Packard
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