reFind hangs until any key pressed when Display is _completely_ powered off(unplugged)

[TalkingHead]

Hello,
i installed latest 0.12.0 refind (x64) on my system to dual boot different OS (Win10, ).

In reFind.conf is basically set up this:
timeout 12
use_nvram false
textonly
textmode 2
showtools shell, shutdown, reboot
scanfor manual
default_selection 1
menuentry Windows 10 {...}
menuentry Other {...}
include themes/sometheme-rEFInd/theme.conf

reFind works fine in text and graphicsmode.
As expected refind starts, shows its text or graphics, and after count down, the default_selection is booted.

My Display, Printer, Soundbar is plugged to a switched plug, to switch them completely off when not needed. If i need to access my PC remotely i start it via wol and use RDP/ssh for remote access (no Display,Printer,Sound needed during remote access).

Now the problem is, when the power cord of the Display (connected via DP to PC ) is unplugged, then refind hangs until until i press any key and then the timeout starts and boots default_selection.

This is what can be observed when the pc starts while Display is completely powered off:
CD/DVD gets initialized
Keyboard/Mouse get initialized
DiskActivity LED blinks about 4-5 times (like it does normally)
Then nothing happens (waited 2-3 minutes)
When i fully power on the Display, the screen is black.
When i press any key, refind then shows the expected content (either text or graphics according to config)

The funny thing is: If the Display has power, but turned off using its "soft switch", refind starts normally.
BTW: The dispay is a Dell UH2713HM.

Could you help here? It would be great, if refind starts although the displays completely powered off.
Thanks in advance,
T.

[TalkingHead]

Hi,
i could nail it down and fix it.
PauseForKey() is called in function egSetTextMode(...), when e.g. the demanded screen mode is not valid. In my case, the switch to mode 2 was not possible while the screen was completely powered off and the following error handling path paused at PauseForKey().
To resolve this, I replaced it with PauseSeconds(15).
Now reFind continues while the screen ist completely powerd off.

One minor issue persists: When textmode is disabled and resolution is set to 5 in config , then refind gets hard stuck while display is completely powered of. But it works in low default resolution when resolution is not configured.

Kind regards, T

[joevt]

Right. PauseForKey is called after displaying certain error messages. Maybe there needs to be an option to replace PauseForKey with a PauseSeconds(x) where x is number from 0 (no pause) to whatever. If PauseSeconds doesn't exist in the conf file, then PauseForKey should be used as usual.

[dakanji]

Added this feature to RefindPlus modified version.

It will appear in v0.12.0.H onwards when released or you can build the WIP version.