- I have installed GUI and checked the default display resolution was
1280*1024@75Hz---> While booting and
afterbooting external display not showing anything.
- Changed to display resolution 1152*864@75Hz ---> while booting not able to
see content on display but
Afterboot able to see content in external disaplay.
- if "nomodeset" kernel parameter is passed issue is not reproducible.
Workaround:
- If we install GUI based ubuntu and after OS boot done change display
resolution to the 1152*864@75Hz we can
able to see content on external display.
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Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1981554
Title:
[Ubuntu-22.04] Video mode is not working with the external monitor
Status in linux package in Ubuntu:
Incomplete
Bug description:
Description:
The SUT Dell EMC Poweredge R440 can not display video mode with external
monitor when Ubuntu 22.04 boots. The video mode working properly under iDRAC
virtual console.
Steps to Reproduce:
1. Connect External monitor to SUT using VGA cable.
2. Mount ubuntu-22.04-live-server-amd64.iso by iDRAC virtual console.
3. Start to install the OS and click "Try or Install Ubuntu server".
4. The SUT can not display video mode with monitor when OS boots.
Expected Results:
Video mode should work properly when OS boots with external monitor.
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https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1981554/+subscriptions
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