It turns out it was another issue - the laptop was slow when using a
particular charger. I mistakenly assumed it had to do with lightdm
because when I disconnected the external screen I disconnected the
laptop charger too.
** Changed in: lightdm (Ubuntu)
Status: New => Invalid
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You rece
Public bug reported:
I connected to my laptop an external monitor (Dell P2314H) via HDMI and
since than then the system is extremely slow, but only when the external
display is connected.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: lightdm 1.10.5-0ubuntu1.1
ProcVersionSignature: Ubuntu
