Public bug reported:

I use a Philips BDM4037U 40'', 4k monitor.
Connecting it via DP to my Lenovo 910 4k does work (except for random display 

But when connecting it via HDMI the display resolution is sometimes
correctly set (I cannot see a pattern when this works) but sometimes the
display resolution is just set to FullHD, 1920x1080 Pixel @ 60Hz.

Due to limitations of the supported HDMI protocol on my laptop I can
only drive the display with 30Hz when in 4k mode. Which is totally fine
for me. But this mode isn't correctly identified, most of the time.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-13-generic 4.15.0-13.14 [modified: 
ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10
Uname: Linux 4.15.0-13-generic x86_64
ApportVersion: 2.20.9-0ubuntu4
Architecture: amd64
 /dev/snd/controlC0:  thet       1429 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Wed Apr 11 12:00:28 2018
HibernationDevice: RESUME=UUID=bedd1248-32dd-43ca-be9f-28337086ea86
InstallationDate: Installed on 2018-04-09 (1 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Beta amd64 (20180404)
MachineType: LENOVO 80VF
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-13-generic.efi.signed 
root=UUID=998520ff-c841-45ab-8312-2bb876ae2a0b ro quiet splash vt.handoff=1
 linux-restricted-modules-4.15.0-13-generic N/A
 linux-backports-modules-4.15.0-13-generic  N/A
 linux-firmware                             1.173
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install) 05/31/2017
dmi.bios.vendor: LENOVO
dmi.bios.version: 2JCN39WW
dmi.board.asset.tag: NO Asset Tag Agera
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40709 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 31
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo YOGA 910-13IKB
dmi:bvnLENOVO:bvr2JCN39WW:bd05/31/2017:svnLENOVO:pn80VF:pvrLenovoYOGA910-13IKB:rvnLENOVO:rnAgera:rvrSDK0J40709WIN:cvnLENOVO:ct31:cvrLenovoYOGA910-13IKB: IDEAPAD 80VF
dmi.product.version: Lenovo YOGA 910-13IKB
dmi.sys.vendor: LENOVO

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

** Tags: amd64 apport-bug bionic wayland-session

You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.

  Display resolution of monitor via HDMI incorrectly identified

To manage notifications about this bug go to:

ubuntu-bugs mailing list

Reply via email to