No change with kernel 4.19.0-041900rc5-generic, alas. The bizarre thing is the Xorg log (~/.local/share/xorg/Xorg.0.log) saying
[ 11.016] (II) modeset(0): Supported established timings: and subsequently the finest mode being 1280x1024@75Hz. Then, in the section(s) called [ 11.017] (II) modeset(0): Supported detailed timing: it does include a mode with "clock: 241.5 MHz" and 2560x1440. It also says later: [ 11.017] (--) modeset(0): HDMI max TMDS frequency 250000KHz so it is happy up to 250MHz. And much later, it says [ 11.906] (II) modeset(0): Printing DDC gathered Modelines: [ 11.906] (II) modeset(0): Modeline "2560x1440"x0.0 241.50 2560 2608 2640 2720 1440 1443 1448 1481 +hsync -vsync (88.8 kHz eP) and so on, i.e., including a 2560x1440 mode. I do not understand that parts are happily talking about the maximum resolution of the monitor via HDMI, and other parts seem to not know anything about it. Any help welcome. Would you like me to try the intel driver (again)? pj -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1793837 Title: xorg gives low resolution on HDMI port Status in linux package in Ubuntu: Triaged Bug description: This is a Zotac CI547 box. It has to video outputs: one HDMI and one DisplayPort. The HDMI port appears as DP-1 in the logs, the DisplayPort as DP-2. The hardware is Intel HD 620 and is allegedly able to run two displays simultaneously at 4K. I have one WQHD monitor (=2560x1440) and I get that full resolution over the DisplayPort. However, I would like to also get that resolution over the HDMI port (in order to connect two identical monitors), but over HDMI I only get 1024x768. Updating the kernel to the latest 4.18.8 using UKUU made no difference. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: xorg 1:7.7+19ubuntu7.1 Uname: Linux 4.18.8-041808-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.3 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: None CurrentDesktop: X-Cinnamon Date: Sat Sep 22 00:21:15 2018 DistUpgraded: Fresh install DistroCodename: bionic DistroVariant: ubuntu ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation HD Graphics 620 [8086:5916] (rev 02) (prog-if 00 [VGA controller]) Subsystem: Intel Corporation HD Graphics 620 [8086:0000] InstallationDate: Installed on 2018-09-19 (2 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) MachineType: ZOTAC ZBOX-CI527/CI547 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.8-041808-generic root=UUID=a3c0f54d-b5ae-4a0f-89ec-8e47ad34e2ef ro quiet splash acpi_backlight=native pci=nomsi resume=UUID=a3c0f54d-b5ae-4a0f-89ec-8e47ad34e2ef resume_offset=34816 vt.handoff=1 SourcePackage: xorg Symptom: display UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/25/2017 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: B331P206 dmi.board.asset.tag: NA dmi.board.name: ZBOX-CI527/CI547 dmi.board.vendor: ZOTAC dmi.board.version: XX dmi.chassis.asset.tag: Default string dmi.chassis.type: 9 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrB331P206:bd04/25/2017:svnZOTAC:pnZBOX-CI527/CI547:pvrXX:rvnZOTAC:rnZBOX-CI527/CI547:rvrXX:cvnDefaultstring:ct9:cvrDefaultstring: dmi.product.family: NA dmi.product.name: ZBOX-CI527/CI547 dmi.product.sku: NA dmi.product.version: XX dmi.sys.vendor: ZOTAC version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.91-2 version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.5-0ubuntu0~18.04.1 version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.5-0ubuntu0~18.04.1 version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1793837/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
