I think I'm affected by this bug as well. The relevant bits in dmesg:
[55632.090484] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus
alignment
[55632.090918] pci_bus 0000:01: Allocating resources
[55632.091041] pci_bus 0000:02: Allocating resources
[55632.091090] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus
alignment
[55632.093607] pci_bus 0000:01: Allocating resources
[55632.093746] pci_bus 0000:02: Allocating resources
[55632.093798] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus
alignment
[55632.093896] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus
alignment
[55632.094026] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus
alignment
[55632.094136] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus
alignment
[55632.094535] pci_bus 0000:01: Allocating resources
[55632.094660] pci_bus 0000:02: Allocating resources
[55632.094708] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus
alignment
This occurs whenever I wake my laptop from suspend. The fonts are
grossly distorted and unreadable. I've attached one example screenshot
(note: it's a HiDPI setup). I tried using a newer video driver from
ppa:oibaf/graphics-drivers (which fixed a suspend/resume issue), to no
avail.
I'm running on a DELL XPS13 9343 (2015).
$ 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:47 memory:f6000000-f6ffffff memory:e0000000-efffffff
ioport:f000(size=64)
$ uname -a
Linux paperclip 3.19.0-17-generic #17-Ubuntu SMP Wed May 6 16:46:12 UTC 2015
x86_64 x86_64 x86_64 GNU/Linux
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 15.04
Release: 15.04
Codename: vivid
$ apt-cache policy xserver-xorg-video-intel
xserver-xorg-video-intel:
Installed: 2:2.99.917+git1505041932.5054e2~gd~v
Candidate: 2:2.99.917+git1505041932.5054e2~gd~v
Version table:
*** 2:2.99.917+git1505041932.5054e2~gd~v 0
500 http://ppa.launchpad.net/oibaf/graphics-drivers/ubuntu/ vivid/main
amd64 Packages
100 /var/lib/dpkg/status
2:2.99.917-1~exp1ubuntu2.1 0
500 http://archive.ubuntu.com/ubuntu/ vivid-updates/main amd64 Packages
2:2.99.917-1~exp1ubuntu2build1 0
500 http://archive.ubuntu.com/ubuntu/ vivid/main amd64 Packages
** Attachment added: "Screen/font corruption in software properties dialog"
https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/1432194/+attachment/4398144/+files/d10E9y9.png
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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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