Re: How to recover when monitor goes blank.

[Felix Miata <mrmazda@earthlink.net>]

Ram Ramesh composed on 2024-06-20 17:43 (UTC-0500):

>> Not to recover, but to perhaps prevent, via kernel cmdline, one can direct the
>> kernel which framebuffer mode to force-enable with video=, e.g.:

>> 	video=2560x1440@60e

>> https://www.kernel.org/doc/Documentation/fb/modedb.txt

> I think kernel thinks that no monitor is attached or KB is present. I 
> want to remote login and tell it to look again and find them.
> It appears like there is no magic incantation exists for that. I was 
> hoping a write to /sys or /proc file will do the trick, but no such 
> thing seem to exists.

Did you try 'e' as I suggested, or read that page? From there:

[quote]
'e' will force the display to be enabled, i.e. it will override the detection
if a display is connected.
[/quote]

The way I read it, if it doesn't work, it's yet another kernel bug, because it
should - prevent - not fix.
-- 
Evolution as taught in public schools is, like religion,
	based on faith, not based on science.

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata