This is probably due to the open source 'nouveau' driver the system is
using. Please open the 'Additional Drivers' app and use it to install
the Nvidia driver it recommends.
If the problem continues to happen after that then next time the freeze
occurs:
1. Wait for 10 seconds.
2. Reboot.
3. Run these commands:
journalctl -b-1 > prevboot.txt
lspci -kv > newlspci.txt
and attach the resulting text files here.
** Tags added: nouveau
** Summary changed:
- Xorg freeze after closing lid and Suspend
+ Screen freeze after closing lid and suspend
** Package changed: xorg (Ubuntu) => ubuntu
** Changed in: ubuntu
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1900910
Title:
Screen freeze after closing lid and suspend
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