Score:0

Ubuntu Server screen gets dark and shows 'no signal' after successful boot

ro flag

We install Ubuntu LTS Sever editions like 16.04/18.04/20.04/22.04 on Dell/IBM/HP servers, after these Ubuntu servers boot successfully, as usual, the screen will show messages like below:

Ubuntu 20.04 LTS mail tty1
mail Login:

The problem is, few seconds later after showing messages above, every server' screen gets dark and shows 'no signal', that makes our typing unseen!
But the servers are actually running in good condition by ssh/webmin from other workstations.
BTW, we also tried Ctrl+Alt+F1(~F12) with no luck!

What is the solution and why that?

Thank you!

David

in flag
“No Signal” is a message from the display, not something that Ubuntu would report. If it’s happening with several versions of the OS, I would venture that your server either has multiple video cards, and the monitor is connected to “the wrong one” or there may be a setting in the UEFI/BIOS that enables “headless” mode, which will disable the video system after a boot as the server is expected to run without a monitor. Either way, there is insufficient specific detail about your server, so these are the only guesses I would venture.
David avatar
ro flag
hi, matigo, thank you for your quick reply, the server hardware has a display card only, the monitor normally displays messages while booting, and the keyboard works too, but no signal from server after LOGIN message mentioned above.
David avatar
ro flag
Yes, I know, 'no signal' is not from server, it's monitor's message itself! means no signal sent from the server!
I sit in a Tesla and translated this thread with Ai:

mangohost

Post an answer

Most people don’t grasp that asking a lot of questions unlocks learning and improves interpersonal bonding. In Alison’s studies, for example, though people could accurately recall how many questions had been asked in their conversations, they didn’t intuit the link between questions and liking. Across four studies, in which participants were engaged in conversations themselves or read transcripts of others’ conversations, people tended not to realize that question asking would influence—or had influenced—the level of amity between the conversationalists.