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drager

Member

Registered: 2021-08-24

Posts: 1

Dell latitude 7390 freezes without an external monitor connected

I have a Dell latitude 7390 laptop. The problem is that the laptop freezes if I do not connect an external monitor...
When I connect one via HDMI, USB-C it does not freeze. I have tried several linux distros, but the problem is the same (perhaps kernel related then? Caps lock blinking).
Sometimes it even happened on the live CD when trying to install e.g Ubuntu LTS, or another distro. I spoke with Dell support and they told me to update firmwares etc but didn't seem to make any change. However, Windows 10 works fine on the computer without freezes...

One interesting thing to note is that the computer works fine if I just insert a USB-C -> DP dongle without connecting the monitor, i.e it does not freeze. When I unplug it I'm getting the following in journalctl -xe:

xhci host controller not responding assume dead
HC died; cleaning up
can't change power state from D3cold to D0 (config space inaccessible)

and then it freezes.

Other weirdness is that it seems like I cannot use encryption on the disk, the disk disappears after running luksFormat o,0 i.e. not to be found in /dev/disk/by-uuid

The computer got this graphics:

VGA compatible controller: Intel Corporation UHD Graphics 620 (rev 07) (prog-if 00 [VGA controller])

Any ideas/suggestions? Or just stick with the dongle in the computer at all times?

Last edited by drager (2021-08-24 09:37:14)

chb1

Member

Registered: 2021-12-16

Posts: 1

Re: Dell latitude 7390 freezes without an external monitor connected

Same laptop here and having exactly the same issue.

Adding the kernel parameter i915.enable_psr=0 as a workaround solves the issue for me, as suggested by:

https://www.dell.com/community/Linux-Ge … 592#M17301

Since today there is also an upstream bug report: https://gitlab.freedesktop.org/drm/intel/-/issues/4813

Cheers

Last edited by chb1 (2021-12-17 09:14:39)