I have similar problem with xubuntu & ubuntu studio (fresh install or upgrade) , it happen only with some resolutions & without screen rotation. i "solved" it increasing framebuffer in at least 1 pixel,
eg: xrandr --fb 1441x900 --output DisplayPort-0 --mode 1440x900 --panning 1440x0 try? -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to libxcb in Ubuntu. https://bugs.launchpad.net/bugs/1873895 Title: Regression: block staircase display with side-by-side monitors of different pixel widths To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1873895/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
