After a bunch of updates on Feb 4th my Trusty install failed to boot to desktop. I did notice some mir packages updating, some plymouth packages, lightdm (I think), and a whole lot more.
Starting in Recovery mode | resume gave me a partial desktop with the wrong display parameters - 1024x768 (4:3) instead of 1600x900, but no Unity sidebar, so no access to programs.
Recovery mode + networking | root allowed me to update/upgrade, with a number of upgrades held back today. After that I could boot to the desktop, but still at the incorrect display parameters. Synaptic completed the upgrades, so I'm now up to date , but still getting an incorrect display.
Any ideas? Other versions (Saucy) give correct display parameters, but all three Trusty kernels (3.13.0-5,6,7) are "stuck" at 1024x768.
Any help appreciated...