1002:68ba The Linux kernel is no longer able to page the graphics processor, making the system to boot with a blank screen

[Alberto Salvia Novella]

HOW TO REPRODUCE
1. Upgrade the system.
2. Install an affected Radeon graphics processor in your system (in my case HD6850).

EXPECTED BEHAVIOUR
- The system to boot normally.

REAL BEHAVIOUR
- After showing the splash screen, the monitor doesn't detect any signal and goes blank.

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: linux-image-3.16.0-25-generic 3.16.0-25.33
ProcVersionSignature: Ubuntu 3.16.0-25.33-generic 3.16.7
Uname: Linux 3.16.0-25-generic x86_64
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC2: es20490446e 2327 F.... pulseaudio
 /dev/snd/controlC1: es20490446e 2327 F.... pulseaudio
 /dev/snd/controlC0: es20490446e 2327 F.... pulseaudio
CurrentDesktop: Unity
Date: Fri Dec 12 10:28:30 2014
HibernationDevice: RESUME=UUID=84e36a57-47e6-4596-a4bf-54a233f40ad7
InstallationDate: Installed on 2013-05-21 (569 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
IwConfig:
 eth0 no wireless extensions.

 lo no wireless extensions.
MachineType: MEDIONPC MS-7358
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-25-generic root=UUID=7c16b6a8-52d3-4e20-94c4-933af64fd891 ro quiet splash
RelatedPackageVersions:
 linux-restricted-modules-3.16.0-25-generic N/A
 linux-backports-modules-3.16.0-25-generic N/A
 linux-firmware 1.138
RfKill:

SourcePackage: linux
UpgradeStatus: Upgraded to utopic on 2014-09-24 (79 days ago)
dmi.bios.date: 02/18/2008
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: 6.00 PG
dmi.board.name: MS-7358
dmi.board.vendor: MICRO-STAR INTERNATIONAL CO., LTD
dmi.board.version: Fab D
dmi.chassis.type: 3
dmi.chassis.vendor: OEM
dmi.chassis.version: OEM
dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvr6.00PG:bd02/18/2008:svnMEDIONPC:pnMS-7358:pvrOEM:rvnMICRO-STARINTERNATIONALCO.,LTD:rnMS-7358:rvrFabD:cvnOEM:ct3:cvrOEM:
dmi.product.name: MS-7358
dmi.product.version: OEM
dmi.sys.vendor: MEDIONPC

[Alberto Salvia Novella (es20490446e)]

@ Christopher M. Penalver:

Control register 2 is a piece of hardware in the graphics card. So mentioning it without saying it is from the graphics is meaningless, as the control register could belong to any hardware.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.