Yes quite a few people have reported similar problems this year with
Ubuntu's newer kernels. But I don't recall any of them being proven to
be obvious software bugs. Just a more conservative bandwidth
calculation, usually solved with a new cable.
If you want to go to maximum quality, I recommend the Apple Thunderbolt
4 Pro cables to avoid such issues. But that's a lot of money so probably
the option of last resort.
We do have a software option that might help too. In
~/.config/monitors.xml you can add maxbpc:
<monitor>
...
<maxbpc>8</maxbpc>
</monitor>
Choose 8 or 6 and then log in again. That should reduce the bandwidth
requirements, which might be enough.
--
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/2077766
Title:
[i915] Dell Ultrasharp 4919DW only achieves half of native resolution
Status in linux package in Ubuntu:
New
Bug description:
Hi :) hope all is well
The Dell Ultrasharp 4919DW monitor is no longer detected correctly in
Ubuntu after a recent update, causing it to only display a resolution
of 1024x768 instead of its native 5120x1440 (32:9) resolution over
USB-C.
Steps to Reproduce:
Connect the Dell Ultrasharp 4919DW monitor to a laptop running Ubuntu via
USB-C.
Observe that the monitor is detected as a "PNP screen" instead of "Dell" and
defaults to a resolution of 1024x768.
Attempt to change the screen mode to achieve higher resolution. The maximum
available resolution is 2560x1440 (2K), but it only uses half of the screen.
PBP mode on the screen
Reload the system with the latest Ubuntu LTS version.
Repeat the steps on another laptop using Linux Mint.
Expected Result:
The monitor should be detected as a Dell Ultrasharp 4919DW and should display
at its full native resolution of 5120x1440.
Actual Result:
The monitor is detected as a generic "PNP screen" with a default resolution
of 1024x768. Changing the screen mode to pbp only achieves 2560x1440, which
utilizes only half of the screen.
Additional Information:
The issue persists after reloading the system with the latest Ubuntu LTS
version.
The issue also occurs on another laptop running Linux Mint.
The monitor works correctly on a Windows system, displaying at its full
5120x1440 resolution.
thanks
Steve
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: xorg 1:7.7+23ubuntu3
ProcVersionSignature: Ubuntu 6.8.0-38.38-generic 6.8.8
Uname: Linux 6.8.0-38-generic x86_64
NonfreeKernelModules: zfs
ApportVersion: 2.28.1-0ubuntu3
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: pass
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Fri Aug 23 21:40:31 2024
DistUpgraded: Fresh install
DistroCodename: noble
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
Intel Corporation WhiskeyLake-U GT2 [UHD Graphics 620] [8086:3ea0] (rev 02)
(prog-if 00 [VGA controller])
Subsystem: Lenovo WhiskeyLake-U GT2 [UHD Graphics 620] [17aa:2292]
InstallationDate: Installed on 2024-05-21 (95 days ago)
InstallationMedia: Ubuntu 24.04 LTS "Noble Numbat" - Release amd64 (20240424)
MachineType: LENOVO 20QD001NZA
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcKernelCmdLine: BOOT_IMAGE=/BOOT/ubuntu_yno3im@/vmlinuz-6.8.0-38-generic
root=ZFS=rpool/ROOT/ubuntu_yno3im ro quiet splash vt.handoff=1
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/06/2022
dmi.bios.release: 1.56
dmi.bios.vendor: LENOVO
dmi.bios.version: N2HET73W (1.56 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20QD001NZA
dmi.board.vendor: LENOVO
dmi.board.version: SDK0K17763 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.25
dmi.modalias:
dmi:bvnLENOVO:bvrN2HET73W(1.56):bd12/06/2022:br1.56:efr1.25:svnLENOVO:pn20QD001NZA:pvrThinkPadX1Carbon7th:rvnLENOVO:rn20QD001NZA:rvrSDK0K17763WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20QD_BU_Think_FM_ThinkPadX1Carbon7th:
dmi.product.family: ThinkPad X1 Carbon 7th
dmi.product.name: 20QD001NZA
dmi.product.sku: LENOVO_MT_20QD_BU_Think_FM_ThinkPad X1 Carbon 7th
dmi.product.version: ThinkPad X1 Carbon 7th
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.120-2build1
version.libgl1-mesa-dri: libgl1-mesa-dri 24.0.9-0ubuntu0.1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:21.1.12-1ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:22.0.0-1build1
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.917+git20210115-1build1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
1:1.0.17-2build1
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2077766/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : [email protected]
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
