This bug affects me as well. No nvidia card however. Output of lshw
for the display portion is as follows:
description: VGA compatible controller
product: Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 09
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:44 memory:f7800000-f7bfffff
memory:e0000000-efffffff ioport:f000(size=64)
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https://bugs.launchpad.net/bugs/1247189
Title:
[13.10] Ubuntu freezes completely when switching user
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