Public bug reported:
While using Ubuntu 19.10 with either MATE or GNOME, I can use only
1920x1080 resolution instead of the full 2560x1440. If extra pixels are
configured, they fall off the right side or bottom of the display and
are not visible. Reproduced on Raspberry Pi 4 with 3GB max workaround.
ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: xorg 1:7.7+19ubuntu12
ProcVersionSignature: User Name 5.3.0-1008.9-raspi2 5.3.1
Uname: Linux 5.3.0-1008-raspi2 aarch64
ApportVersion: 2.20.11-0ubuntu8.2
Architecture: arm64
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Sun Nov 10 18:18:23 2019
DistUpgraded: Fresh install
DistroCodename: eoan
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
ProcKernelCmdLine: coherent_pool=1M 8250.nr_uarts=1 cma=64M cma=256M
video=HDMI-A-1:1920x1080@60 smsc95xx.macaddr=DC:A6:32:38:DF:15
vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000 net.ifnames=0
dwc_otg.lpm_enable=0 console=ttyS0,115200 console=tty1 root=LABEL=writable
rootfstype=ext4 elevator=deadline rootwait
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.99-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 19.2.1-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.5+git20191008-0ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.0.1-1ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug arm64 eoan ubuntu uec-images
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https://bugs.launchpad.net/bugs/1852035
Title:
Cannot use full resolution (2560x1440) of Dell U2715H
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