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On a Thinkpad W530, running Debian 10 (with XFCE):

The screen turns black after closing and opening the lid, and stays black. The computer remains on and is working, it is possible to SSH in over the network, no errors in dmesg.

After closing the still black screen for a second time, the computer enters into sleep mode (the sleep LED turns on).

Opening the lid the second time makes the display turn back on. This happens fast, hence I believe the sleep mode is ACPI S3 (suspend to RAM).

I've attempted to install the nvidia prorpietary drivers, sadly, same problem.

What should I do? I've tried to poke around in systemd's logind.conf, as well as in XFCE's power management settings, it is set to "lock screen" both on battery and on AC power.

Edit:

The first time the lid is closed, if I attempt to switch to a virtual terminal with ctrl+alt+f1, this succeeds. I am able to switch back to X with ctrl+alt+f7, but then I'm greeted with "This session is locked", and it is completely unresponsive.

  • Does pressing ctrl+alt+f1 have any impact? – plugwash Feb 20 at 21:30
  • @plugwash Yes, it drops me into an SVGA console (framebuffer). I am able to switch back to X with ctrl+alt+f7, but then I'm greeted with "This session is locked", and it is completely unresponsive. I will update my question with this new information. – AlphaCentauri Feb 20 at 21:33
  • Personally I'd try upgrading to testing and if it still doesn't work filling a bug against xorg. – plugwash Feb 20 at 23:48
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Which version of Debian do you use? I met something similar on Debian 9, solved on Debian 10. I do not use a display manager (DM, ie lightDM, GDM, etc) on my systems, booting on multi-user.target and then using startx to start X11. If you do the same, using a DM may solve the problem. That's what helped me before upgrading.

| improve this answer | |
  • This is Debian 10, I'm using the default system DM that comes with Debian. – AlphaCentauri Feb 27 at 20:30

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