Confirmed bug on Lenovo E550.
Prominently appears when plugging in an external Samsung S23C350 screen before boot/power on however plugging it in once logged it. Thus far the bug has only once occurred when the external screen is not plugged in.
The fix mentioned has not fixed my installation using xserver-xorg-video-intel-lts-utopic ver 2.99.914-1 (Comment #8 mentions that fix is not for utopic - possibly why the fix did not work)
Confirmed bug on Lenovo E550.
Prominently appears when plugging in an external Samsung S23C350 screen before boot/power on however plugging it in once logged it. Thus far the bug has only once occurred when the external screen is not plugged in.
https:/ /bugs.launchpad .net/linux/ +bug/1432194 :: bug #1432194 refers to the same/similar issue.
The fix mentioned has not fixed my installation using xserver- xorg-video- intel-lts- utopic ver 2.99.914-1 (Comment #8 mentions that fix is not for utopic - possibly why the fix did not work)
<code>
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0 d0000000- d0ffffff memory: a0000000- bfffffff ioport: 5000(size= 64) 3.16.0- 34-generic/ kernel/ drivers/ gpu/drm/ i915/i915. ko 8FB054D5 00022B3sv* sd*bc03sc* i* 00022B2sv* sd*bc03sc* i* 00022B1sv* sd*bc03sc* i* 00022B0sv* sd*bc03sc* i* 000162Dsv* sd*bc03sc* i* xorg-video- intel-lts- utopic 2:2.99. 914-1~exp1ubunt u4.2~trusty1 amd64 X.Org X server -- Intel i8xx, i9xx display driver
root@u1404:~/# uname -a
Linux u1404 3.16.0-34-generic #47~14.04.1-Ubuntu SMP Fri Apr 10 17:49:16 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
root@u1404:~/# lshw -c video
*-display
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
resources: irq:63 memory:
root@u1404:~/# modinfo i915 | head
filename: /lib/modules/
license: GPL and additional rights
description: Intel Graphics
author: Tungsten Graphics, Inc.
srcversion: 4623F6696D48BF7
alias: pci:v00008086d0
alias: pci:v00008086d0
alias: pci:v00008086d0
alias: pci:v00008086d0
alias: pci:v00008086d0
root@u1404:~/# lspci -nnk | grep '\[03' -A2
00:02.0 VGA compatible controller [0300]: Intel Corporation Broadwell-U Integrated Graphics [8086:1616] (rev 09)
Subsystem: Lenovo Device [17aa:5021]
Kernel driver in use: i915
--
05:00.0 Display controller [0380]: Advanced Micro Devices, Inc. [AMD/ATI] Opal XT [Radeon R7 M265] [1002:6604] (rev ff)
Kernel driver in use: radeon
06:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5227 PCI Express Card Reader [10ec:5227] (rev 01)
root@u1404:~/# dpkg -l | grep -i video-intel
ii xserver-
root@u1404:~/#
</code>