Public bug reported:
I am on Ubuntu 14.04.5 LTS
I recently updated my laptop to vmlinuz-4.4.0-37-generic
After rebooting, I lost my external Monitor (Display application does not even
detect it )
This is my main monitor and is connected via HDMI.
Ive had error messages with Ubuntu an the external screen on Intel
"Broadwell-U" but this is the first time it cut me off totally.
Host bridge: Intel Corporation Broadwell-U Host Bridge -OPI (rev 09)
VGA compatible controller: Intel Corporation Broadwell-U Integrated Graphics
(rev 09)
lshw -c video
*-display UNCLAIMED
description: VGA compatible controller
product: Broadwell-U Integrated Graphics
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
configuration: latency=0
resources: memory:f0000000-f0ffffff memory:e0000000-efffffff
ioport:4000(size=64)
cat /var/log/Xorg.0.log |grep EE
[ 27.266] (EE) No devices detected.
[ 27.270] (EE) open /dev/dri/card0: No such file or directory
[ 27.270] (EE) open /dev/dri/card0: No such file or directory
[ 27.270] (EE) Screen 0 deleted because of no matching config section.
[ 27.335] (EE) AIGLX: reverting to software rendering
** Affects: xserver-xorg-video-intel (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1621620
Title:
Broadwell-U screen stopped working after 14.04 update
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