Low resolution during boot is something usually caused by the Nvidia proprietary driver. So I wonder if you might still have some remnants of that installed?
** Tags added: nouveau nvidia -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1820685 Title: Wrong resolution during boot Status in linux package in Ubuntu: Incomplete Bug description: When booting the startup screen is in low resolution while before it was in high resolution. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: xorg 1:7.7+19ubuntu7.1 ProcVersionSignature: Ubuntu 4.15.0-46.49-generic 4.15.18 Uname: Linux 4.15.0-46-generic x86_64 .tmp.unity_support_test.0: ApportVersion: 2.20.9-0ubuntu7.6 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: None CurrentDesktop: ubuntu:GNOME Date: Mon Mar 18 18:04:57 2019 DistUpgraded: 2018-09-26 21:31:06,974 DEBUG icon theme changed, re-reading DistroCodename: bionic DistroVariant: ubuntu DkmsStatus: virtualbox, 5.2.18, 4.15.0-46-generic, x86_64: installed GraphicsCard: NVIDIA Corporation GF108 [GeForce GT 530] [10de:0de5] (rev a1) (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. GF108 [GeForce GT 530] [1043:839b] InstallationDate: Installed on 2018-01-04 (437 days ago) InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801) MachineType: ASUSTeK COMPUTER INC. CM6870 ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-46-generic root=UUID=4aa7afed-ca87-4f94-9a08-c806fccfbd1d ro quiet splash vt.handoff=1 SourcePackage: xorg Symptom: display UpgradeStatus: Upgraded to bionic on 2018-09-26 (172 days ago) dmi.bios.date: 12/25/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 0708 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: CM6870 dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: Rev X.0x dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0708:bd12/25/2012:svnASUSTeKCOMPUTERINC.:pnCM6870:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnCM6870:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.family: Desktop dmi.product.name: CM6870 dmi.product.version: System Version dmi.sys.vendor: ASUSTeK COMPUTER INC. version.compiz: compiz 1:0.9.13.1+18.04.20180302-0ubuntu1 version.libdrm2: libdrm2 2.4.95-1~18.04.1 version.libgl1-mesa-dri: libgl1-mesa-dri 18.2.2-0ubuntu1~18.04.2 version.libgl1-mesa-glx: libgl1-mesa-glx 18.2.2-0ubuntu1~18.04.2 version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4.2 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.5-1ubuntu1 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 xserver.bootTime: Wed Sep 26 20:09:04 2018 xserver.configfile: default xserver.errors: Failed to load module "nvidia" (module does not exist, 0) Failed to load module "nvidia" (module does not exist, 0) xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.19.6-1ubuntu4~16.04.1 xserver.video_driver: nouveau To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1820685/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
