xorg 7.0 + integrated i815: distortions

[Denis Vlasenko]

See attached screenshot.

The funny thing is, amount of distortions decreases with usage,
and ~10 mins after X startup it practically doesn't happen.

There is another similarly "fading with time" problem:
videos played thru mplayer with default xvideo output mode
have bluish semi-transparent horizontal bars (randomly appearing
and vanishing in the course of playback).
"mplayer -vo x11" output mode (which doesn't use xvideo)
seems to be free from this problem.

# lspci
00:00.0 Host bridge: Intel Corp. 82815 815 Chipset Host Bridge and Memory Controller Hub (rev 04)
00:02.0 VGA compatible controller: Intel Corp. 82815 CGC [Chipset Graphics Controller] (rev 04)
...

My config is below.
--
vda

Section "Module"
    Load  "extmod"
EndSection

# Select your layout with:
# XFree86 -layout <your_ServerLayout>
# xinit ... -- -layout <your_ServerLayout>
# Default is the first one listed here
#
# Intel i815:
Section "ServerLayout"
    Identifier  "i815"
    Screen      0 "i815" 0 0
    InputDevice "Mouse0" "CorePointer"
    InputDevice "Keyboard0" "CoreKeyboard"
EndSection
Section "Screen"
    Identifier  "i815"
    Device      "i810"
    Monitor     "Monitor0"
    DefaultDepth        24
    SubSection "Display"
        Depth   24
        Modes   "1280x1024"
    EndSubSection
EndSection
Section "Device"
    Identifier  "i810"
    Driver      "i810"
EndSection

Section "Monitor"
    Identifier	"Monitor0"
    VendorName	"HP"
    ModelName	"HP71"
    HorizSync	30-70
    VertRefresh	50-120
EndSection

Section "InputDevice"
    Identifier	"Keyboard0"
    Driver	"keyboard"
    Option 	"XkbRules" "xorg"
    Option	"XkbModel" "pc105"
    Option	"XkbLayout" "us,ru,ua"
    Option	"XkbOptions" "grp:lwin_toggle,grp_led:scroll"
EndSection

Section "InputDevice"
    Identifier	"Mouse0"
    Driver	"mouse"
    Option	"Device" "/dev/psaux"
    Option	"Protocol" "IMPS/2"
    Option	"ZAxisMapping" "4 5"
EndSection
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