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[David <abbasi.david@xxxxxxxxx>]

By the way, I can confirm that the missing letters problem is solved
with the proposed 2:2.99.914-1~exp1ubuntu4.5~trusty1 .

Laptop ThinkPad T550
i5-5200U
Intel HD Graphics 5500 (Broadwell GT2)
Ubuntu 14.04

Thank you very much!

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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

Status in OEM Priority Project:
  New
Status in xf86-video-intel:
  Unknown
Status in xserver-xorg-video-intel package in Ubuntu:
  Fix Released
Status in xserver-xorg-video-intel-lts-utopic package in Ubuntu:
  Invalid
Status in xserver-xorg-video-intel-lts-utopic source package in Trusty:
  Fix Committed
Status in xserver-xorg-video-intel source package in Utopic:
  Fix Committed

Bug description:
  Trying to achieve: Get a more stable graphics environment up and
  running

  Steps to take:  basic ubtuntu 14.04 install.  Boot up and run for a
  few minutes and then ...

  What happens: After running for a few minutes the graphics gets
  flacky.

  What should happen:  Graphics should not get flaky.

  I have just installed ubuntu 14.04 on my new thinkpad t450s.
  Everything basically works, but something is very flaky about my
  keyboard or display or both.  After running for awhile some apps
  (E.g., thunderbird and sometimes emacs for example) will display
  garbage.  If I refresh by moving the screen around or changing
  buffers/tabs/etc. they can often recover.

  I see that there is an [Intel(R) Graphics Installer for Linux*
  1.0.7](https://01.org/linuxgraphics/downloads/2014/intelr-graphics-
  installer-linux-1.0.7). I am leery about just loading this and running
  it.  Any suggestions about how I should proceed?

      $ sudo 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:e0000000-e0ffffff memory:d0000000-dfffffff ioport:3000(size=64)
      $ modinfo i915 | head
      filename:       /lib/modules/3.16.0-31-generic/kernel/drivers/gpu/drm/i915/i915.ko
      license:        GPL and additional rights
      description:    Intel Graphics
      author:         Tungsten Graphics, Inc.
      srcversion:     9929027A8A6F05972AD6986
      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*
      $ uname -a
      Linux mypad 3.16.0-31-generic #43~14.04.1-Ubuntu SMP Tue Mar 10 20:13:38 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

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