WOL does turn my HP 8300 SFF running Ubuntu 22.04 lts, but stops at a black screen with white cursor

[etyrnal]

So, this computer both boots all the way up to Ubuntu 22.04 lts, and also can successfully RESTART to Ubuntu 22.04 lts, every time, completely normally [indicating there is no bootup problem] when using the power button, or system menu to restart.

The computer DOES wake up to WOL magic packet sent via SCOTT SHUMA, or from my router's WOL page.

What it does NOT succeed at it this:  When i send the WOL magic packet, the computer IMMEDIATELY powers on, goes through the various motherboard HP and bios startup tests/screens, but STOP the boot process at a BLACK SCREEN that only has a steady white underscore 'cursor' in the top left of the screen.  And NEVER proceeds any further, and there are NO messages or errors displayed, or indicated through any beeps.

And the 8300 will just sit like that indefinitely.


The machine has 1 ssd attached with 3 partitions [EFI / root / swap], and one hdd with four partitions.  There is also a non-bootable usb memory stick in a rear usb port.

I don't get any messages about not finding a bootable device. [or as previously mentioned ANY messages at all].

The WOL is obviously enabled in BIOS.  The WOL setting are set to boot to 'hard drive'.  

It FEELS like the WOL process does NOT follow the SAME boot-process as a normal power button power up.

Is the WOL bios boot proceedure looking for ONLY a windows type boot partition, or mbr, or what??

It feels mildly asinine that there is no message explaining why it fails to boot, or why it feels it makes sense to just sit at this black screen.

So this feels like BUGGY behavior.  This can't possibly be the expected behavior, can it?

How do i change it so that a WOL boot actually boots the machine up FULLY/NORMALLY??

Just turning on is a fun trick, but without actually completing the boot process, it's a dumb trick.