[i915] Max resolution over VGA is 1024x768

[Jesus H]

I have 1 external monitor, and the max resolution for this FullHD monitor which I can configure is 1024x768

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: xorg 1:7.7+23ubuntu2
ProcVersionSignature: Ubuntu 5.15.0-46.49-generic 5.15.39
Uname: Linux 5.15.0-46-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: pass
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Fri Aug 19 08:40:15 2022
DistUpgraded: Fresh install
DistroCodename: jammy
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Lenovo 3rd Gen Core processor Graphics Controller [17aa:21f3]
InstallationDate: Installed on 2022-06-04 (75 days ago)
InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419)
MachineType: LENOVO 2349AV6
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.15.0-46-generic root=UUID=b8deb0ab-b1f3-469e-85fe-3cf4a56dc624 ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/21/2016
dmi.bios.release: 2.70
dmi.bios.vendor: LENOVO
dmi.bios.version: G1ETB0WW (2.70 )
dmi.board.asset.tag: Not Available
dmi.board.name: 2349AV6
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: BB70374050
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.ec.firmware.release: 1.13
dmi.modalias: dmi:bvnLENOVO:bvrG1ETB0WW(2.70):bd01/21/2016:br2.70:efr1.13:svnLENOVO:pn2349AV6:pvrThinkPadT430:rvnLENOVO:rn2349AV6:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:skuLENOVO_MT_2349:
dmi.product.family: ThinkPad T430
dmi.product.name: 2349AV6
dmi.product.sku: LENOVO_MT_2349
dmi.product.version: ThinkPad T430
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.110-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 22.0.1-1ubuntu2.1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:21.1.3-2ubuntu2.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-2build3
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20210115-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.17-2build1

[Daniel van Vugt (vanvugt)]

Thanks for the bug report. It sounds like the kernel was unable to retrieve the EDID data from the monitor. This often happens with analog VGA connectors so I assume that's the issue... Are you able to try the mini-DisplayPort connector instead?

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Jesus H (jesushdm)]

Hi Daniel, well first of all I sent this bug because I saw the option and I just checked.
Thougth it was something automatic and anyone would reply, so instead thanks to you!

After you mentioned, I just realized my laptop has an miniDP connector.
My monitor doesnt have DisplayPort, so I used an VGA<->miniDP adapter, a friend had a unit of exactly this item https://www.ebay.es/itm/353392052156
It didnt work. My laptop screen went black and nothing in the monitor (made sure to select VGA input).
(Im not sure if your concern about VGA still affects here, as the output port is miniDP, but still is VGA in the other end)

I just made sure that I can connect through VGA well and with FullHD, in a Windows 10 partition in this same laptop, so just discarded the option the VGA port itself is bad.
I dont understand why Linux and graphics is so hard!

Thanks a lot for your time, highly appreciated.

[Daniel van Vugt (vanvugt)]

Yes my concern about VGA is the same if it's still VGA at either end.

I don't know if EDID retrieval is meant to work on analog VGA connections, but in recent years there has been a slow trickle of bug reports about this.

I think either:

 (a) Windows has a "driver" (.inf file) for the monitor already that defines the graphics modes for the monitor without the OS having to auto-detect it; or

 (b) The Linux kernel is not as good at auto-detecting over analog VGA as Windows is.