Working VM suddenly stop loading in GUI mode (F7) but working in tty1 to tty6 mode

[vas]

Hi, I ahve few(3) VMS based out of ubuntu 18.04(bionic) which were all functional from at least a year now. But yesterday, one of the 3 VM stops booting up in GUI mode(F7). It ends up ina blinking curson on the screen. I can login into machine from tty1,ty2 to tty6 but not getting anything on tty7 but a blinking cursor only.

Attaching vbox logs for someone to take a look urgently.

Note: I have checked some existing issues:

1. My host(windows 10) hypervisor is disabled.
2. I can successfully run other 2 VMs
3. My VM has sufficient RAM/Space(from df and free output)
4. Virtualisation is enabled in BIOS settings.
5. Uptodate Vbox version and extension pack.
6. Done apt-get update from tty1 and rebooted multiple times.
7. 3D acceleration is in disabled mode.

Please check my logs attached.

[vas]

vbox_logs

[vas]

another instance of vbox

[vas]

REstoring to previous snapshot worked for me, but I forgot to take current snapshot, is there a way to restore back to the original today's state(to get my lost files back ?)

[vas]

Hello, anyone getting similar issues ?

Note: Yday, I have reverted my VM to previous running state and got it fully functional but again today got ubuntu software update and ran into same issue , screen kept on blinking.

@virtual_box_team Please consider this on priority

[galitsyn]

Hello vas,

You are running old version of Guest Additions (6.1.18). Please consider to update both VBox and Additions to the latest versions (currently, 6.1.26).