No restore after screen blank, have to force restart


This is not happening all the time but several times per week at least.

Laptop is a Lenovo Yoga 3-14
So far this has always happened when plugged into power.
Screen is set to blank after 8 minutes inactivity.
Automatic suspend: only on battery.

Screen goes blank, and then can't be awakened. There is a tiny cursor in the top-left corner. The only thing is to hold down power button and switch back on.

Often I'm playing a lecture, which might be 20-30 minutes in length. Screen goes blank, I continue listening but after the lecture ends, its unresponsive. Its also happened when the system is idle, not playing a lecture.

I haven't experienced the issue (yet) when closing the lid and re-opening, behaviour here has been perfect.

I didn't experience this on OS16 (or the 16.3 release).

Thank you in advance for any ideas and help.

Can you please list your graphics?

sudo lshw -C video

Thanks Aravisian.

description: VGA compatible controller
product: HD Graphics 5500
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
logical name: /dev/fb0
version: 09
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list rom fb
configuration: depth=32 driver=i915 latency=0 resolution=1920,1080
resources: irq:46 memory:d0000000-d0ffffff memory:c0000000-cfffffff ioport:3000(size=64) memory:c0000-dffff

Further info:
Its very inconsistent, so how likely is it the video driver?

Most times, it recovers fine after screen blank, then it happens.

Same on battery, most of the time recovers from screen blank and from suspend.

Thank you for any thoughts / pointers.

In your BIOS / EFI settings, are TPM, Secure Chip or Secure Boot enabled?

Secure Boot: disabled
Secure Boot Mode: Standard
Boot Mode: UEFI
I don't see any setting for TPM or Secure Chip - its a pretty simple BIOS, the laptop is from 2015.

This could be GDM (Gnome Display Manager) failing to initialize on wake...
Or your Graphics failing to init at wake.

GDM is known to have these bugs for many years.
The i915 driver is more stable and this rarely happens with the i915. I would focus on the GDM troubleshooting, first.
You might try

sudo apt install --reinstall gdm3

OK, done. Thank you.
Lets see what happens?


Still happening, sorry to say. Not necessarily after screen blank, I've also now had it happen on logging in after opening the laptop lid: enter password -> screen blanked, small cursor in top left, then after about 30 second it restarted itself.

As before, its not on every time.

I suppose there is the possibility its a hardware fault (the laptop is 2015)? But, it has only happened since upgrading to Z OS 17 Pro from 16.

Many thanks once again for any ideas,

Did you freshly install Zorin OS 17 or did you upgrade to 17 from 16 using the Zorin Upgrader tool?


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