Comment 0 for bug 1507255

This affects both Ubuntu GNOME and Ubuntu Wily 20151017.1. The graphics are so badly garbled I can only file this bug on an unaffected OS where I've held back the update on just that one package to about Alpha 2 status:

lance@lance-INTEL-desktop:~$ apt-cache policy xserver-xorg-video-intel
xserver-xorg-video-intel:
  Installed: 2:2.99.917-1ubuntu1
  Candidate: 2:2.99.917+git20150808-0ubuntu4
  Version table:
     2:2.99.917+git20150808-0ubuntu4 0
        500 http://us.archive.ubuntu.com/ubuntu/ wily/main i386 Packages
 *** 2:2.99.917-1ubuntu1 0
        100 /var/lib/dpkg/status

I'll attach a picture of the garbled screen with the updated xserver-xorg-video-intel package. Oddly a screenshot taken from the affected OS displays perfectly OK in the unaffected OS so I used my camera.

The info provided by lspci may not be very helpful:

lance@lance-INTEL-desktop:~$ lspci -v -s `lspci | awk '/VGA/{print $1}'`
00:02.0 VGA compatible controller: Intel Corporation 4 Series Chipset Integrated Graphics Controller (rev 03) (prog-if 00 [VGA controller])
 Subsystem: Intel Corporation Device 0025
 Flags: bus master, fast devsel, latency 0, IRQ 27
 Memory at d0000000 (64-bit, non-prefetchable) [size=4M]
 Memory at c0000000 (64-bit, prefetchable) [size=256M]
 I/O ports at f1c0 [size=8]
 Expansion ROM at <unassigned> [disabled]
 Capabilities: <access denied>
 Kernel driver in use: i915

The tech specs show:

Internal Graphics:
• Intel ® GMA4500 onboard graphics subsystem with support for:
― Analog displays (VGA)
― Digital displays (DVI-D)

I'm just using VGA ATM.

Something else worth mentioning is this warning displayed while filing the bug report:

Your system is providing 3D via software rendering rather than hardware rendering. This is a compatibility mode which should display 3D graphics properly but the performance may be very poor. If the problem you're reporting is related to graphics performance, your real question may be why X didn't use hardware acceleration for your system.

I did try booting an earlier kernel to no avail, but holding back just this one update prevents the borkage.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: xserver-xorg-video-intel 2:2.99.917-1ubuntu1
ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
Uname: Linux 4.2.0-16-generic i686
ApportVersion: 2.19.1-0ubuntu2
Architecture: i386
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: GNOME
Date: Sun Oct 18 00:17:35 2015
DistUpgraded: Fresh install
DistroCodename: wily
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Intel Corporation 4 Series Chipset Integrated Graphics Controller [8086:2e42] (rev 03) (prog-if 00 [VGA controller])
   Subsystem: Intel Corporation Device [8086:0025]
   Subsystem: Intel Corporation Device [8086:0025]
InstallationDate: Installed on 2015-08-26 (52 days ago)
InstallationMedia: Ubuntu-GNOME 15.10 "Wily Werewolf" - Alpha i386 (20150826.1)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-16-generic root=UUID=39597a1e-90b6-4e81-ae29-4c01d28f7f17 ro quiet splash vt.handoff=7
Renderer: Software
SourcePackage: xserver-xorg-video-intel
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/23/2010
dmi.bios.vendor: Intel Corp.
dmi.bios.version: LDB4310H.86A.0037.2010.1223.1121
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: DB43LD
dmi.board.vendor: Intel Corporation
dmi.board.version: AAE60577-202
dmi.chassis.type: 3
dmi.modalias: dmi:bvnIntelCorp.:bvrLDB4310H.86A.0037.2010.1223.1121:bd12/23/2010:svn:pn:pvr:rvnIntelCorporation:rnDB43LD:rvrAAE60577-202:cvn:ct3:cvr:
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.64-1
version.libgl1-mesa-dri: libgl1-mesa-dri 11.0.2-1ubuntu4
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.0.2-1ubuntu4
version.xserver-xorg-core: xserver-xorg-core 2:1.17.2-1ubuntu9
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0+git20150819-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917-1ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu3
xserver.bootTime: Sat Oct 17 23:58:59 2015
xserver.configfile: default
xserver.errors:
 AIGLX error: Calling driver entry point failed
 AIGLX: reverting to software rendering
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:

xserver.version: 2:1.17.2-1ubuntu9