System settings > Desktop > Enable desktop effects causes fglrx to cycle

Mon May 4 17:06:48 UTC 2009

I have a problem that is driving me slightly crazy ...

I have a Asus ATI Radeon HD 3650 dual head on my wifes machine running
the fglrx driver. It works OK, if a little hesitant.
glx gears gives 4900 fps, 'world of goo' runs smoothly ...

The problem comes when I enable ...
System settings > Desktop > Enable desktop effects.

When I do the screen freezes, goes black, flashes parts of the desktop
and cycles like this for approx 30 seconds then returns
with 'Enable desktop effects' unticked.

Looking at /var/log/Xorg.o.log I get continuous repeating of

(II) fglrx(0): EDID vendor "SAM", prod id 997
(II) fglrx(0): Using EDID range info for horizontal sync
(II) fglrx(0): Using EDID range info for vertical refresh
(II) fglrx(0): Printing DDC gathered Modelines:
(II) fglrx(0): Modeline "1680x1050"x0.0  119.00  1680 1728 1760 1840
1050 1053 1059 1080 +hsync -vsync (64.7 kHz)
(II) fglrx(0): Modeline "800x600"x0.0   40.00  800 840 968 1056  600
601 605 628 +hsync +vsync (37.9 kHz)
(II) fglrx(0): Modeline "800x600"x0.0   36.00  800 824 896 1024  600
601 603 625 +hsync +vsync (35.2 kHz)
(II) fglrx(0): Modeline "640x480"x0.0   31.50  640 656 720 840  480
481 484 500 -hsync -vsync (37.5 kHz)
(II) fglrx(0): Modeline "640x480"x0.0   31.50  640 664 704 832  480
489 492 520 -hsync -vsync (37.9 kHz)
(II) fglrx(0): Modeline "640x480"x0.0   30.24  640 704 768 864  480
483 486 525 -hsync -vsync (35.0 kHz)
(II) fglrx(0): Modeline "640x480"x0.0   25.18  640 656 752 800  480
490 492 525 -hsync -vsync (31.5 kHz)
(II) fglrx(0): Modeline "720x400"x0.0   28.32  720 738 846 900  400
412 414 449 -hsync +vsync (31.5 kHz)
(II) fglrx(0): Modeline "1280x1024"x0.0  135.00  1280 1296 1440 1688
1024 1025 1028 1066 +hsync +vsync (80.0 kHz)
(II) fglrx(0): Modeline "1024x768"x0.0   78.75  1024 1040 1136 1312
768 769 772 800 +hsync +vsync (60.0 kHz)
(II) fglrx(0): Modeline "1024x768"x0.0   75.00  1024 1048 1184 1328
768 771 777 806 -hsync -vsync (56.5 kHz)
(II) fglrx(0): Modeline "1024x768"x0.0   65.00  1024 1048 1184 1344
768 771 777 806 -hsync -vsync (48.4 kHz)
(II) fglrx(0): Modeline "832x624"x0.0   57.28  832 864 928 1152  624
625 628 667 -hsync -vsync (49.7 kHz)
(II) fglrx(0): Modeline "800x600"x0.0   49.50  800 816 896 1056  600
601 604 625 +hsync +vsync (46.9 kHz)
(II) fglrx(0): Modeline "800x600"x0.0   50.00  800 856 976 1040  600
637 643 666 +hsync +vsync (48.1 kHz)
(II) fglrx(0): Modeline "1152x864"x0.0  108.00  1152 1216 1344 1600
864 865 868 900 +hsync +vsync (67.5 kHz)
(II) fglrx(0): Modeline "1680x1050"x0.0  119.00  1680 1728 1760 1840
1050 1053 1059 1080 +hsync -vsync (64.7 kHz)
(II) fglrx(0): Modeline "1280x1024"x0.0  108.00  1280 1328 1440 1688
1024 1025 1028 1066 +hsync +vsync (64.0 kHz)
(II) fglrx(0): Modeline "1280x960"x0.0  108.00  1280 1376 1488 1800
960 961 964 1000 +hsync +vsync (60.0 kHz)
(II) fglrx(0): Modeline "1152x864"x0.0  108.00  1152 1216 1344 1600
864 865 868 900 +hsync +vsync (67.5 kHz)

Which looks to me like the driver is repeatedly probing the display to
see what resolution it can manage.

My xorg.conf is ...

# xorg.conf.failsafe (X.Org X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
#   sudo dpkg-reconfigure -phigh xserver-xorg

Section "ServerLayout"
        Identifier     "aticonfig Layout"
        Screen      0  "aticonfig-Screen[0]-0" 0 0
EndSection

Section "Files"
EndSection

Section "Module"
EndSection

Section "ServerFlags"
        Option      "DontZap" "False"
EndSection

Section "Monitor"
        Identifier   "aticonfig-Monitor[0]-0"
        Option      "VendorName" "ATI Proprietary Driver"
        Option      "ModelName" "Generic Autodetecting Monitor"
        Option      "DPMS" "true"
EndSection

Section "Device"
        Identifier  "aticonfig-Device[0]-0"
        Driver      "fglrx"
        BusID       "PCI:1:0:0"
EndSection

Section "Screen"
        Identifier "aticonfig-Screen[0]-0"
        Device     "aticonfig-Device[0]-0"
        Monitor    "aticonfig-Monitor[0]-0"
        DefaultDepth     24
        SubSection "Display"
                Viewport   0 0
                Depth     24
        EndSubSection
EndSection

Any ideas anyone ?

Cheers

Dave

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