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** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1967960

Title:
  LightDM login display corrupted in 22.04 Beta

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  This problem appeared on an older machine I am using to test 22.04 Beta:
  Biostar MCP6P-M2+ mainboard with AMD Sempron 3400+ CPU and nVidia 7200 GS 
graphic card, using either VGA or DVI connection to a NEC 1920x1200 LED 
monitor. If I remember correctly, it occurred after installing all of the 
updates that were available on April 4.

  On boot the LightDM login screen is shredded by horizontal lines
  (photo attached) but when I enter my password the uncorrupted login
  screen briefly appears and my user session opens properly. I installed
  gdm3 and using that display manager the login screen appears normally.
  In all cases the monitor reports 1920x1200, 74.0 kHz horizontal, 59.8
  Hz vertical on the VGA connection.

  If I use a 1280x1024 LCD monitor there is no problem with the LightDM
  login screen.

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