Comment 10 for bug 1760068

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Theo Linkspfeifer (lastonestanding) wrote :

Thiago, this bug may be caused by having two Xorg instances (the user session and the unlock screen which runs in another VT) accessing the graphics driver. And up until now, only the nvidia driver was reported to be part of the problem.

Please check the logs files in /var/log/lightdm for any hints.