Graphics corruption using sideport memory

[Jeff Galli]

When using only the sideport memory with a ATI HD 3300 there are small corruptions in the graphics around window borders. Windows that have moving content (scrolling lines in terminal or videos) give more corruption. It looks just like horizontal lines of pixels offset. When sideport+uma is enabled there are no corruptions.

Ubuntu 10.04 Daily from March 28
fglrx installed using apt and aticonfig --initial

Linux Desktop 2.6.32-17-generic #26-Ubuntu SMP Sat Mar 20 02:23:45 UTC 2010 x86_64 GNU/Linux
fglrx:
  Installed: 2:8.721-0ubuntu5

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: fglrx 2:8.721-0ubuntu5
ProcVersionSignature: Ubuntu 2.6.32-17.26-generic 2.6.32.10+drm33.1
Uname: Linux 2.6.32-17-generic x86_64
NonfreeKernelModules: fglrx
Architecture: amd64
Date: Sun Mar 28 14:40:28 2010
DkmsStatus: fglrx, 8.721, 2.6.32-17-generic, x86_64: installed
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20100328)
MachineType: System manufacturer System Product Name
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-17-generic root=UUID=11d87f11-934e-4982-a4cc-79fe6ff8deff ro quiet splash
ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: fglrx-installer
dmi.bios.date: 09/18/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1504
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: M3A78-T
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1504:bd09/18/2009:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM3A78-T:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
system:
 distro: Ubuntu
 codename: lucid
 architecture: x86_64
 kernel: 2.6.32-17-generic

[madbiologist (me-again)]

This might be fixed upstream in kernel 2.6.35-rc4. From the changelog:

commit 0888e883ea5ff8fac27e813256d6c1eaede5a234
Author: Alex Deucher
Date: Sat Jun 12 11:50:13 2010 -0400

    drm/radeon/kms: fix bandwidth calculation when sideport is present

    Fixes fdo bug 27529:
    https://bugs.freedesktop.org/show_bug.cgi?id=27529

    Reported-by: steckdenis
    Signed-off-by: Alex Deucher
    Signed-off-by: Dave Airlie

[madbiologist (me-again)]

A PPA of the abovementioned kernel can be found at http://kernel.ubuntu.com/~kernel-ppa/mainline/

[DLHDavidLH (dlhdavidlh-yahoo)]

this bug affects

Ubuntu 11.04 -and- 11.10

with

AMD Radeon HD 3300

[madbiologist (me-again)]

@DLHDavidLH - are you using the open-source Radeon driver or the ATI fglrx (Catalyst) driver? I realise now that my comment #2 does not apply to the original reporter as they are using the fglrx driver.

[DLHDavidLH (dlhdavidlh-yahoo)]

i tried both . . . . .

open-source Radeon driver (was the worst).........ATI fglrx (Catalyst) driver ( was a little better ).......

the one from Ati is good for 3D

[DLHDavidLH (dlhdavidlh-yahoo)]

Ubuntu 11.04 was affect the most...........

still testing...........

[DLHDavidLH (dlhdavidlh-yahoo)]

with . . . Ubuntu 10.04 ( LTS )

open-source Radeon driver ( was the worst )

. . . . ATI fglrx (Catalyst) driver ( was Best )

[DLHDavidLH (dlhdavidlh-yahoo)]

still testing . . . .