Reboot doesn't work properly / F12 black screen

[Patrick797]

Hi everyone,

I have a custom-built PC running both openSUSE Tumbleweed and Windows 11.

I'm experiencing an issue when trying to restart from openSUSE into Windows 11. Upon restarting, I don't see the usual boot up screen that shows the F12: Boot Menu and Del: BIOS Setup options. Instead, the system immediately boots into openSUSE without showing its boot menu either.

If I press F12 before openSUSE starts loading, I just get a black screen and nothing happens.

However, if I shut down the PC completely and after a few seconds power it back on, I do see the expected screen with the F12 and Del options.

I've checked the BIOS settings, and everything appears to be in order.

So my question is: Why doesn't the boot up menu screen appear after a restart, but only after a full shutdown and cold boot?

Any help or insights would be appreciated!

My PC spec:
Gigabite B650M AORUS ELITE AX,
AMD Ryzen 5 7600X
AMD Radeon RX 590
Crucial Pro DDR5 RAM 32GB Kit (2x16GB)
Crucial T500 500GB SSD PCIe Gen4 NVMe M.2
2x Samsung SSD
MSI MAG A750GL PSU

 

[PuppyHome]

Perhaps shutting down the OS and rebooting your PC might give you the boot menu when pressing (or holding) F12.
In the case above you are telling your PC to restart OpenSUSE and it does exactly that.
I once had a pc which did just that n had to shut down any OS before being able to boot into another one.

Hope this helps.

 

[Patrick797]

I once had a pc which did just that n had to shut down any OS before being able to boot into another one.

Hope this helps.

Thank you for your reply.
I thought I would get the boot up menu screen after a restart.
Restart: with Fast Startup disabled, should be essentially shuts down all processes, and then starts them up again
restart should be the same as shut down & start up
I am not 100% sure

 

[f33dm3bits]

Upon restarting, I don't see the usual boot up screen that shows the F12: Boot Menu and Del: BIOS Setup options. Instead, the system immediately boots into openSUSE without showing its boot menu either.

Try changing your Grub timeout(GRUB_TIMEOUT)(ie: 15) in the Grub configuration file within your Tumbleweed installation and before rebooting run grub-mkconfig to update your current Grub configuration with the new settings.

 

[Trynna3]

In the case above you are telling your PC to restart OpenSUSE and it does exactly that.

That's strange. Me being a normie, my HP always restarts and allows me to boot into BIOS/UEFI when pressing certain buttons, regardless from which OS I am restarting.
I still have Win10 on the original HDD and Linux on nvme disk.

And depending on the Windows setting, I have been told that to truly clean up the system and start afresh, it needs to reboot, not just shut down, because it might just 'shut down' into a dormant state, not truly close all processes and start afresh after turning it on again.

 

[osprey]

Hi everyone,

I have a custom-built PC running both openSUSE Tumbleweed and Windows 11.

I'm experiencing an issue when trying to restart from openSUSE into Windows 11. Upon restarting, I don't see the usual boot up screen that shows the F12: Boot Menu and Del: BIOS Setup options. Instead, the system immediately boots into openSUSE without showing its boot menu either.

If I press F12 before openSUSE starts loading, I just get a black screen and nothing happens.

However, if I shut down the PC completely and after a few seconds power it back on, I do see the expected screen with the F12 and Del options.

I've checked the BIOS settings, and everything appears to be in order.

So my question is: Why doesn't the boot up menu screen appear after a restart, but only after a full shutdown and cold boot?

Any help or insights would be appreciated!

My PC spec:
Gigabite B650M AORUS ELITE AX,
AMD Ryzen 5 7600X
AMD Radeon RX 590
Crucial Pro DDR5 RAM 32GB Kit (2x16GB)
Crucial T500 500GB SSD PCIe Gen4 NVMe M.2
2x Samsung SSD
MSI MAG A750GL PSU

The most likely reason that a reset doesn't behave the same way as a cold boot is that in the case of a restart or reset, not all hardware is fully reinitialised. During a restart (as opposed to a cold boot) the BIOS/UEFI is not reinitialised from the poweroff state. Since power remains supplied throughout for a restart the BIOS/UEFI doesn't go through all the steps it takes during a cold boot. Reinitialisation of the whole hardware doesn't happen during the restart because it's already happened in the previous cold boot according to the BIOS/UEFI. That means that it's going to do what's already lodged in its processing without the full reinitialisation.

 

[Patrick797]

Thank you all for your replies

Why do I get a black screen and nothing happens when I press F12 before openSUSE starts loading?
It is a bit strange!