AMD Radeon HD 8400 [1002:9830] Garbled display with open-source driver on Trusty

[Po-Hsu Lin]

CID: 201305-13643 HP Pavilion 15

This system will suffer from the low-graphic mode issue (bug 1301839) after boot.
But this problem has been fixed, running "sudo apt-get dist-upgrade" from tty1 could solve this problem.

However, after upgraded, the display will be garbled.
Install the proprietary could solve it.
I will mark this bug as a blocker since the desktop is totally unusable.

Steps:
1. Install 14.04 + update (3.13.0-29) from tty1, boot to desktop.
(with xserver-xorg-video-ati version 1:7.3.0-1ubuntu3.1)

Expected result:
* Display should work after upgraded.

Actual result:
* Display grabled, screenshot attached.

[1002:6660] Works fine after upgrade on other systems, so I think it's the problem for [1002:9830]

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-29-generic 3.13.0-29.53
ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2
Uname: Linux 3.13.0-29-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: ubuntu 1582 F.... pulseaudio
 /dev/snd/controlC0: ubuntu 1582 F.... pulseaudio
CurrentDesktop: Unity
Date: Sun Jun 15 23:45:18 2014
HibernationDevice: RESUME=UUID=2d88ac54-8a7d-4232-bba8-7de8f7c643cc
InstallationDate: Installed on 2014-06-13 (2 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
IwConfig:
 eth0 no wireless extensions.

 lo no wireless extensions.
MachineType: Hewlett-Packard HP Pavilion TS 14 Notebook PC
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-29-generic root=UUID=e6716449-fd5a-45db-8d4e-3cdc48701e81 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-29-generic N/A
 linux-backports-modules-3.13.0-29-generic N/A
 linux-firmware 1.127.2
RfKill:

SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/12/2013
dmi.bios.vendor: Insyde
dmi.bios.version: B.0C
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 216E
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 31.0E
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnInsyde:bvrB.0C:bd07/12/2013:svnHewlett-Packard:pnHPPavilionTS14NotebookPC:pvr088E100000005910000630100:rvnHewlett-Packard:rn216E:rvr31.0E:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP Pavilion TS 14 Notebook PC
dmi.product.version: 088E100000005910000630100
dmi.sys.vendor: Hewlett-Packard

[Alberto Milone (albertomilone)]

Please attach the output of dmesg when using the open driver.

[Launchpad Janitor (janitor)]

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

[Alberto Milone (albertomilone)]

This looks like memory corruption in the open driver. Does installing the 14.04.2 stack (lts-utopic) help?

[Po-Hsu Lin (cypressyew)]

Verified with 14.04.1 stock image, graphic will be garbled after boot with LiveUSB.
But with 14.04.3 stock image, graphic won't be garbled anymore from installation stage and after boot to desktop.

Therefore I will mark this bug as "Fix-Released"
Thanks