Resolution limits are almost always imposed by the motherboard/system manufacturer. Not the software or CPU/GPU manufacturer. In the case of your system there are some interesting notes:
--- "*This DisplayPort only supports DP to D-Sub dongles. DP to HDMI dongles and DP to DVI dongles are not supported. To power up three monitors, please connect your monitors to 2 x HDMI and 1 x DP ports or 2 x HDMI and 1 x D-Sub ports via a DP to D-Sub dongle. HDMI 1 (4K/2K@30Hz) / HDMI 2 (4K/2K@30Hz) Supports DisplayPort 1.1a with max. resolution up to 4K x 2K (4096x2304) @ 30Hz" --- [https://www.asrock.com/nettop/Intel/Beebox%20Series/index.asp#Specification] So it appears the machine has some hardware limits that are relevant here: "DP to HDMI dongles and DP to DVI dongles are not supported." so make sure you're not using converters or converter cables. "HDMI 1 (4K/2K@30Hz) / HDMI 2 (4K/2K@30Hz)" so 2560x1440x60Hz is not supported over HDMI. 1920x1080x60Hz is the highest resolution those HDMI ports can do at full frame rate (presumably 60Hz). Although if you're OK with stuttering then you might be able to select 2560x1440x30Hz. "Supports DisplayPort 1.1a with max. resolution up to 4K x 2K (4096x2304) @ 30Hz" Sounds like it should support 2560x1440x60Hz but only if you're using a cable that is DisplayPort at both ends, because "DP to HDMI dongles and DP to DVI dongles are not supported". This is a problem I'm familiar with... A lot of low-power (but modern CPU) systems are made with graphics connectors that don't allow you to use the full resolution the GPU is capable of. Your best bet sounds like trying more cables that are DisplayPort at both ends. See also: https://en.wikipedia.org/wiki/HDMI#Refresh_frequency_limits_for_standard_video https://en.wikipedia.org/wiki/DisplayPort#Resolution_and_refresh_frequency_limits_for_DisplayPort -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1767993 Title: Lubuntu: X11 freezing/low resolution on N3150 intel graphics Status in xorg-server package in Ubuntu: Incomplete Bug description: Hi, I just installed a fresh 18.04 on an ASRock beebox N3150 machine. The regular ubuntu desktop installer hanged after entering X11 mode, machine froze. I then used Lubuntu alternate installer with the console based installation, which worked without any problem. But after rebooting the system again hung after the graphical login prompt. I then changed the boot options in /etc/default/grub to give the kernel the options nosplash nomodeset and to leave the system in console mode (I had similar experiences with former ubuntu versions on that machine where X11 did not start when the mode had been set by console.) Now X11 works, but comes up in vesa mode (1024x768) only. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: xserver-xorg-core 2:1.19.6-1ubuntu4 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 Uname: Linux 4.15.0-20-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 CurrentDesktop: LXDE Date: Mon Apr 30 12:25:09 2018 InstallationDate: Installed on 2018-04-30 (0 days ago) InstallationMedia: Lubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) SourcePackage: xorg-server UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1767993/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
