*** This bug is a duplicate of bug 1444436 ***
https://bugs.launchpad.net/bugs/1444436
Confirmed bug on Lenovo E550 i7 16GB with Intel i915 video configured to
use 1GB RAM.
Predominantly 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 (only had the notebook a few days).
bug #1444436 refers to the same/similar issue but the fix provided has
not fixed my installation using xserver-xorg-video-intel-lts-utopic ver
2.99.914-1 (Comment #8 on bug #1444436 mentions that fix is not for
utopic - possibly why the fix did not work for me)
https://bugs.freedesktop.org/show_bug.cgi?id=90047 mentioned that a fix
was produced multiple months ago and Ubuntu notified but I can't find
it.
<code>
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
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:63 memory:d0000000-d0ffffff memory:a0000000-bfffffff
ioport:5000(size=64)
root@u1404:~/# modinfo i915 | head
filename:
/lib/modules/3.16.0-34-generic/kernel/drivers/gpu/drm/i915/i915.ko
license: GPL and additional rights
description: Intel Graphics
author: Tungsten Graphics, Inc.
srcversion: 4623F6696D48BF78FB054D5
alias: pci:v00008086d000022B3sv*sd*bc03sc*i*
alias: pci:v00008086d000022B2sv*sd*bc03sc*i*
alias: pci:v00008086d000022B1sv*sd*bc03sc*i*
alias: pci:v00008086d000022B0sv*sd*bc03sc*i*
alias: pci:v00008086d0000162Dsv*sd*bc03sc*i*
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-xorg-video-intel-lts-utopic
2:2.99.914-1~exp1ubuntu4.2~trusty1 amd64 X.Org X server
-- Intel i8xx, i9xx display driver
root@u1404:~/#
</code>
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https://bugs.launchpad.net/bugs/1432194
Title:
Graphics unstable on Ubuntu 14.04 and 14.10 using Intel HD Graphics
5500
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