Xorg sessions are suddenly showing corruption upon login, briefly before the shell starts up.
This seems to be related to the use of "-background none" by the DM. If I remove "-background none" from the DM code then the corruption is replaced by a less bad second or two of blackness.
This problem seems to have started when Mesa 18.0.0 was introduced to Ubuntu 18.04. I can't seem to correlate it with anything else, and can't relate it to a specific Xorg update.
Xorg sessions are suddenly showing corruption upon login, briefly before the shell starts up.
This seems to be related to the use of "-background none" by the DM. If I remove "-background none" from the DM code then the corruption is replaced by a less bad second or two of blackness.
This problem seems to have started when Mesa 18.0.0 was introduced to Ubuntu 18.04. I can't seem to correlate it with anything else, and can't relate it to a specific Xorg update.