Created attachment 36945 [details]
As titled

I hope this is a duplicate (meaning you are already working
on fixing it :) ).

The intel graphics drivers have continually become worse and
worse over the past several months (crashing more and more
often as newer versions come out), until I can no longer log
in (using KDE) at all. A few seconds after I try, the screen
goes completely black, and I can not recover any video (even
a console) without rebooting. I am now reduced to using the
console.

Some information:

00:02.0 VGA compatible controller: Intel Corporation 82845G/GL[Brookdale-G]/GE Chipset Integrated Graphics Device (rev 01) (prog-if 00 [VGA controller])
        Subsystem: Compaq Computer Corporation Device 00ba

i686 Intel(R) Pentium(R) 4 CPU 2.00GHz GenuineIntel GNU/Linux

$ qlist -Iv xf86-video-intel
x11-drivers/xf86-video-intel-2.9.1

$ qlist -Iv xorg-server
x11-base/xorg-server-1.7.6

$ qlist -Iv mesa
media-libs/mesa-7.7.1

# qlist -Iv libdrm
x11-libs/libdrm-2.4.18_pre20100211-r1

linux-2.6.32-gentoo-r7

Gentoo (of course :) )

Compaq Evo D510 USDT (Ultra Slim Desktop)

VGA


xorg.conf:

Section "ServerLayout"
    Identifier  "X.org Configured"
    Screen      0 "Screen0" 0 0
EndSection

Section "Monitor"
    Identifier  "Monitor0"
    VendorName  "Monitor Vendor"
    ModelName   "Monitor Model"
EndSection

Section "Device"
    Identifier  "Card0"
    Driver      "intel"
    VendorName  "Intel Corporation"
    BoardName   "82845G/GL[Brookdale-G]/GE Chipset Integrated Graphics Device"
    BusID       "PCI:0:2:0"
EndSection

Section "Screen"
    Identifier "Screen0"
    Device     "Card0"
    Monitor    "Monitor0"
    DefaultDepth    24
    SubSection "Display"
        Depth       24
    EndSubSection
EndSection


I will attach the Xorg.0.log.


The kdm.log might also be of some interest:

X.Org X Server 1.7.6
Release Date: 2010-03-17
X Protocol Version 11, Revision 0
Build Operating System: Linux 2.6.32-gentoo-r7 i686 
Current Operating System: Linux system 2.6.32-gentoo-r7 #1 Fri Apr 9 05:00:34 UTC 2010 i686
Kernel command line: root=/dev/sda6
Build Date: 30 June 2010  04:13:56PM
 
Current version of pixman: 0.17.2
        Before reporting problems, check http://wiki.x.org
        to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
        (++) from command line, (!!) notice, (II) informational,
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Sat Jul 10 15:15:42 2010
(==) Using config file: "/etc/X11/xorg.conf"
FATAL: Module fbcon not found.
QFont::fromString: Invalid description 'Serif,20,5,0,50,0'
QFont::fromString: Invalid description 'Sans Serif,10,5,0,50,0'
QFont::fromString: Invalid description 'Sans Serif,10,5,0,75,0'
intel_bufmgr_gem.c:1152: Error setting memory domains 126 (00000040 00000000): Input/output error .

Fatal server error:
Failed to submit batchbuffer: Input/output error


Please consult the The X.Org Foundation support 
         at http://wiki.x.org
 for help. 
Please also check the log file at "/var/log/Xorg.0.log" for additional information.

X: i830_batchbuffer.h:79: intel_batch_emit_dword: Assertion `pI830->batch_ptr != ((void *)0)' failed.


From /var/log/messages:

Jul 10 15:15:43 system kernel: [  197.505810] render error detected, EIR: 0x00000010
Jul 10 15:15:43 system kernel: [  197.505820] [drm:i915_handle_error] *ERROR* EIR stuck: 0x00000010, masking
Jul 10 15:15:43 system kernel: [  197.505832] render error detected, EIR: 0x00000010
Jul 10 15:16:22 system kernel: [  236.606653] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
Jul 10 15:16:22 system kernel: [  236.606663] render error detected, EIR: 0x00000000
Jul 10 15:16:22 system kernel: [  236.606668] i915: Waking up sleeping processes
Jul 10 15:16:22 system kernel: [  236.606710] reboot required
Jul 10 15:16:22 system kernel: [  236.607406] [drm:i915_do_wait_request] *ERROR* i915_do_wait_request returns -5 (awaiting 876 at 874)
Jul 10 15:16:22 system kernel: [  236.608109] [drm:i915_gem_execbuffer] *ERROR* Execbuf while wedged
Jul 10 15:16:23 system kernel: [  236.773358] [drm] DAC-5: set mode 1280x1024 1b
Jul 10 15:16:23 system kdm[3172]: X server for display :0 terminated unexpectedly
Jul 10 15:16:23 system kernel: [  237.436509] [drm:i915_gem_execbuffer] *ERROR* Execbuf while wedged
Jul 10 15:16:23 system kernel: [  237.572627] [drm] DAC-5: set mode 1280x1024 1b
Jul 10 15:16:23 system kdm[3172]: X server died during startup
Jul 10 15:16:23 system kdm[3172]: X server for display :0 cannot be started, session disabled


If you need anything else, let me know, and I will try to
help. Don't even think about asking me to use a later
kernel, though. I tried 2.6.34-gentoo-r1, and the machine
goes completely black (and locks up) before even starting
X (with no log whatsoever).