Dear All,
I've posted about this before, but I can now give a clearer description of my problem (thanks to Tim Green for a tip that helped me get there). Any suggestions as to how to make DPMS work correctly will be welcome.
I have two computers (say 1 and 2), both with built-in LCD screens, plus two external monitors (A and B) that plug into VGA ports. The results of running xset dpms force off (or going to DPMS off mode via xscreensaver) are as follows:
Computer 1 + no external monitor: built-in screen goes to DPMS off mode.
Computer 1 + monitor A: monitor A goes to DPMS off mode, built-in screen was in off mode anyway, from time computer was started with monitor A plugged in.
Computer 1 + monitor B: monitor B goes to DPMS off mode, built-in screen was in off mode anyway, from time computer was started with monitor B plugged in.
Computer 2 + no external monitor: built-in screen goes to DPMS off mode.
Computer 2 + monitor A: both built-in screen and monitor A go to DPMS off mode.
Computer 2 + monitor B: built-in screen goes to DPMS off mode, monitor B stays on, complaining that I should "check signal cable".
So it seems all individual components work OK, and it's the combination of computer 2 and monitor B that's problematic.
In each case, the monitor behaviour when the computer is switched off altogether is the same as that in response to xset dpms force off.
Thanks very much,
Dan
Some details that might help:
Computer 1 has an Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller (rev 03), and runs Fedora 9 with xorg 1.5.2-6.fc9.
Computer 2 has an Intel Corporation Mobile 945GME Express Integrated Graphics Controller (rev 03), and runs Gentoo with xorg 7.2.
Monitor A is a Samsung SyncMaster 710N.
Monitor B is an LG Flatron W2234S.
xorg.conf from computer 1
# Xorg configuration created by system-config-display
Section "ServerLayout" Identifier "single head configuration" Screen 0 "Screen0" 0 0 InputDevice "Mouse0" "CorePointer" InputDevice "Keyboard0" "CoreKeyboard" EndSection
Section "Files"
# RgbPath is the location of the RGB database. Note, this is the name of the # file minus the extension (like ".txt" or ".db"). There is normally # no need to change the default. # Multiple FontPath entries are allowed (they are concatenated together) # By default, Red Hat 6.0 and later now use a font server independent of # the X server to render fonts.
FontPath "unix/:7100" EndSection
Section "Module" Load "dbe" Load "extmod" Load "fbdevhw" Load "glx" Load "record" Load "freetype" Load "type1" Load "dri" EndSection
Section "InputDevice"
# Specify which keyboard LEDs can be user-controlled (eg, with xset(1)) # Option "Xleds" "1 2 3" # To disable the XKEYBOARD extension, uncomment XkbDisable. # Option "XkbDisable" # To customise the XKB settings to suit your keyboard, modify the # lines below (which are the defaults). For example, for a non-U.S. # keyboard, you will probably want to use: # Option "XkbModel" "pc102" # If you have a US Microsoft Natural keyboard, you can use: # Option "XkbModel" "microsoft" # # Then to change the language, change the Layout setting. # For example, a german layout can be obtained with: # Option "XkbLayout" "de" # or: # Option "XkbLayout" "de" # Option "XkbVariant" "nodeadkeys" # # If you'd like to switch the positions of your capslock and # control keys, use: # Option "XkbOptions" "ctrl:swapcaps" # Or if you just want both to be control, use: # Option "XkbOptions" "ctrl:nocaps" # Identifier "Keyboard0" Driver "kbd" Option "XkbModel" "pc105" Option "XkbLayout" "gb" EndSection
Section "InputDevice" Identifier "Mouse0" Driver "mouse" Option "Protocol" "IMPS/2" Option "Device" "/dev/input/mice" Option "ZAxisMapping" "4 5" Option "Emulate3Buttons" "yes" EndSection
Section "Monitor" Identifier "Monitor0" VendorName "Monitor Vendor" ModelName "LCD Panel 1024x768" HorizSync 31.5 - 48.5 VertRefresh 40.0 - 70.0 Option "dpms" EndSection
Section "Device"
# VendorName "Videocard vendor" # BoardName "VESA driver (generic)" Identifier "Videocard0" Driver "intel" BoardName "Unknown video card" EndSection
Section "Screen" Identifier "Screen0" Device "Videocard0" Monitor "Monitor0" DefaultDepth 24 SubSection "Display" Viewport 0 0 Depth 16 Modes "800x600" "640x480" EndSubSection SubSection "Display" Viewport 0 0 Depth 24 Modes "1024x768" "800x600" "640x480" EndSubSection EndSection
Section "DRI" Group 0 Mode 0666 EndSection
xorg.conf from computer 2
# Xorg configuration created by system-config-display Section "ServerFlags" Option "DontZap" "yes" Option "DontVTSwitch" "no" EndSection
Section "ServerLayout" Identifier "Default Layout" Screen 0 "Screen0" 0 0 InputDevice "Mouse0" "CorePointer" InputDevice "Synaptics Mouse" "AlwaysCore" InputDevice "Keyboard0" "CoreKeyboard" EndSection
Section "InputDevice" Identifier "Keyboard0" Driver "kbd" Option "XkbModel" "pc105" Option "XkbLayout" "gb,us(euro)" Option "XkbOptions" "grp:alt_shift_toggle" EndSection
Section "InputDevice" Identifier "Synaptics Mouse" Driver "synaptics" Option "Device" "/dev/psaux" Option "Protocol" "auto-dev" Option "LeftEdge" "1700" Option "RightEdge" "5300" Option "TopEdge" "1700" Option "BottomEdge" "4200" Option "FingerLow" "25" Option "FingerHigh" "30" Option "MaxTapTime" "180" Option "MaxTapMove" "220" Option "VertScrollDelta" "100" Option "MinSpeed" "0.09" Option "MaxSpeed" "0.18" Option "AccelFactor" "0.0015" Option "SHMConfig" "on" EndSection
Section "InputDevice" Identifier "Mouse0" Driver "mouse" Option "Protocol" "IMPS/2" Option "Device" "/dev/input/mice" Option "ZAxisMapping" "4 5" Option "Emulate3Buttons" "no" EndSection
Section "Monitor" Identifier "Monitor0" Modeline "1024x600" 48.96 1024 1064 1168 1312 600 601 604 622 -HSync +VSync # Option "Above" "Monitor1" Modeline "1280x768" 80.14 1280 1344 1480 1680 768 769 772 795 -HSync +Vsync Modeline "1280x768" 102.98 1280 1360 1496 1712 768 769 772 802 -HSync +Vsync Modeline "1280x1024" 138.54 1280 1368 1504 1728 1024 1025 1028 1069 -HSync +Vsync Modeline "1280x1024" 108.88 1280 1360 1496 1712 1024 1025 1028 1060 -HSync +Vsync Option "dpms" EndSection
Section "Device" Identifier "Videocard0" Driver "intel" # Option "monitor-LVDS" "Monitor0" # Option "monitor-VGA" "Monitor1" Option "Clone" "true" Option "MonitorLayout" "LVDS,VGA" BusID "PCI:0:2:0" # Screen 0 EndSection
Section "Screen" Identifier "Screen0" Device "Videocard0" Monitor "Monitor0" DefaultDepth 24 SubSection "Display" Viewport 0 0 Depth 24 Modes "1280x1024" "1024x600" "800x600" "640x480" Virtual 1280 1024 EndSubSection EndSection
Section "DRI" Group 0 Mode 0666 EndSection