AMD Radeon HD 8400/8330[1002:9830][1002:9832] ghost image appears with specific resolutions while running on open-source driver

[Po-Hsu Lin]

CID: 201310-14248 HP 15 Touchsmart

There are 5 resolution options available:
1366 * 768
1280 * 720
1152 * 768
1024 * 768
800 * 600

When using the open-source video driver, the 1280 * 720 and 1152 * 768 resolution does not work well with it, there will be some ghost images.
Screenshot captured by the Screenshot program looks good. But it looks bad with human eyes, see attachment for the photo.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-30-generic 3.13.0-30.54
ProcVersionSignature: Ubuntu 3.13.0-30.54-generic 3.13.11.2
Uname: Linux 3.13.0-30-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: ubuntu 1649 F.... pulseaudio
 /dev/snd/controlC0: ubuntu 1649 F.... pulseaudio
CRDA:
 country TW:
  (2402 - 2472 @ 40), (3, 27)
  (5270 - 5330 @ 40), (3, 17), DFS
  (5735 - 5815 @ 40), (3, 30)
CurrentDesktop: Unity
Date: Fri Jun 27 00:06:15 2014
HibernationDevice: RESUME=UUID=540104b4-4be9-4245-8c53-2f8471e94cbb
InstallationDate: Installed on 2014-06-26 (0 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: Hewlett-Packard HP 15 Notebook PC
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-30-generic.efi.signed root=UUID=61fbea42-9507-49b2-b9ad-b0050652e97e ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-30-generic N/A
 linux-backports-modules-3.13.0-30-generic N/A
 linux-firmware 1.127.4
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/06/2013
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.09
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 2192
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 41.1A
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.09:bd12/06/2013:svnHewlett-Packard:pnHP15NotebookPC:pvr0887100200005E10000120000:rvnHewlett-Packard:rn2192:rvr41.1A:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP 15 Notebook PC
dmi.product.version: 0887100200005E10000120000
dmi.sys.vendor: Hewlett-Packard

[Brad Figg (brad-figg)]

This change was made by a bot.

[Po-Hsu Lin (cypressyew)]

This issue does not exist with the fglrx proprietary driver (2:13.350.1-0ubuntu2)

[Po-Hsu Lin (cypressyew)]

This bus still exist with 14.04.1 (3.13.0-39), xserver-xorg-video-radeon 1:7.3.0-1ubuntu3.1

[Po-Hsu Lin (cypressyew)]

This issue would happen when user is using the "Mirrored Displays" with an external monitor.
The screen display will be set to 1280*720, causing this issue.

[Po-Hsu Lin (cypressyew)]

Also affect 201310-14256 HP 14 TouchSmart Notebook PC
With AMD Radeon HD 8330 [1002:9832]