I'm using Dell Optiplex 9020. And i install Ubuntu 14.04. But sometimes (not every time) after waking up my computer from suspend state. it will hang in the log in screen, i can't input anything, neither by mouse nor by keyboard.CTRL+ALT+F1 doesn't work either.
Is there anyway or command i can use to debug this problem?
Here is list by sudo lshw|grep -iA6 vga
description: VGA compatible controller
product: Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 06
width: 64 bits
--
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:48 memory:f7800000-f7bfffff memory:e0000000-efffffff ioport:f000(size=64)
*-multimedia:0
description: Audio device
product: Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller
vendor: Intel Corporation
sudo lshw|grep -iA6 vga