Bug#376132: xserver-xorg-video-ati: Very slow rendering of RGBA images

[Hasso Tepper <hasso@linux.ee>]

Package: xserver-xorg-video-ati
Version: 1:6.5.8.0-1
Severity: normal


Rendering RGBA images is awfully slow with ATI cards. Several testing
and unstable users have been confirmed the issue, most of them mentioning
that for them it has been regression after upgrade from 6.8.

Good demonstration is http://kde-apps.org/content/show.php?content=10187
with Konqueror browser. First two screenshots are RGBA, third one is
RGB. Rendering of first two images is really slow, scrolling is sluggish
etc, third one appears instantly and no any problem with scrolling.

01:00.0 VGA compatible controller: ATI Technologies Inc RV350 [Mobility
Radeon 9600 M10] (prog-if 00 [VGA])

# cat /etc/X11/xorg.conf
Section "Files"
        FontPath        "unix/:7100"                    # local font server
        # if the local font server has problems, we can fall back on these
        FontPath        "/usr/share/fonts/X11/misc"
        FontPath        "/usr/lib/X11/fonts/misc"
        FontPath        "/usr/share/fonts/X11/cyrillic"
        FontPath        "/usr/lib/X11/fonts/cyrillic"
        FontPath        "/usr/lib/X11/fonts/100dpi/:unscaled"
        FontPath        "/usr/lib/X11/fonts/75dpi/:unscaled"
        FontPath        "/usr/share/fonts/X11/Type1"
        FontPath        "/usr/lib/X11/fonts/Type1"
        FontPath        "/usr/share/fonts/X11/CID"
        FontPath        "/usr/lib/X11/fonts/CID"
        FontPath        "/usr/lib/X11/fonts/Speedo"
        FontPath        "/usr/share/fonts/X11/100dpi"
        FontPath        "/usr/lib/X11/fonts/100dpi"
        FontPath        "/usr/share/fonts/X11/75dpi"
        FontPath        "/usr/lib/X11/fonts/75dpi"
EndSection

Section "Module"
        Load    "bitmap"
        Load    "dbe"
        Load    "ddc"
        Load    "dri"
        Load    "extmod"
        Load    "freetype"
        Load    "glx"
        Load    "int10"
        Load    "record"
        Load    "type1"
        Load    "vbe"
EndSection

Section "InputDevice"
        Identifier      "Generic Keyboard"
        Driver          "keyboard"
        Option          "CoreKeyboard"
        Option          "XkbRules"      "xfree86"
        Option          "XkbModel"      "pc105"
        Option          "XkbLayout"     "ee"
EndSection

Section "InputDevice"
        Identifier      "Configured Mouse"
        Driver          "mouse"
        Option          "CorePointer"
        Option          "Device"                "/dev/psaux"
        Option          "Protocol"              "PS/2"
        Option          "Emulate3Buttons"       "true"
        Option          "ZAxisMapping"          "4 5"
EndSection

Section "Device"
        Identifier      "ATI Technologies, Inc. RV350 [Mobility Radeon 9600 M10]"
        Driver          "radeon"
        Option          "DMAForXv"              "true"
        Option          "BackingStore"          "true"
EndSection

Section "Monitor"
        Identifier      "Generic Monitor"
        HorizSync       30-60
        VertRefresh     50-75
        Option          "DPMS"
EndSection

Section "Screen"
        Identifier      "Default Screen"
        Device          "ATI Technologies, Inc. RV350 [Mobility Radeon 9600 M10]"
        Monitor         "Generic Monitor"
        DefaultDepth    24
        SubSection "Display"
                Depth   24
                Modes   "1400x1050" "1280x960" "1152x864" "1024x768" "800x600" "640x480"
        EndSubSection
EndSection

Section "Extensions"
        Option          "RENDER"                "Enable"
EndSection

Section "ServerLayout"
        Identifier      "Default Layout"
        Screen          "Default Screen"
        InputDevice     "Generic Keyboard"
        InputDevice     "Configured Mouse"
EndSection

Section "DRI"
        Mode    0666
EndSection


-- System Information:
Debian Release: testing/unstable
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.17-ck1
Locale: LANG=et_EE.iso8859-15, LC_CTYPE=et_EE.iso8859-15 (charmap=ISO-8859-15)

Versions of packages xserver-xorg-video-ati depends on:
ii  libc6                         2.3.6-15   GNU C Library: Shared libraries
ii  xserver-xorg-core             1:1.0.2-8  X.Org X server -- core server

xserver-xorg-video-ati recommends no packages.

-- no debconf information