Will Thompson wrote: > If I boot my laptop (a Toshiba SA55) without an external monitor > attached to the VGA port, and subsequently try to enable the VGA output > with xrandr, xrandr seems to believe it has succeeded but no image is > ever drawn upon the external monitor. >
See below. > If I boot with the external monitor attached, the boot sequence is > displayed exclusively upon it, then X shows up on both the external > display at its full resolution and on the internal display, truncated to > 1024x768. > This looks normal to me. > Upon running `xrandr --output VGA --auto`, the desktop stretches to > 1650x1050, the top-left 1024x768-sized corner is displayed on the laptop > panel, and the external monitor stays blank (claiming "no signal" if > cajoled). Running xrandr while in this state produces: > > Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 2048 x 2048 > VGA connected 1680x1050+0+0 (normal left inverted right x axis y axis) > 473mm x 296mm > 1680x1050 60.0*+ > Is this the exact mode supported by your monitor? Can you compare the Modeline issued in Xorg.0.log for this resolution and refresh when booting with VGA plugged (i.e. when [EMAIL PROTECTED] works) and when booting without and plugging VGA later (i.e. when [EMAIL PROTECTED] does not work)? I think I've seen other people report similar problems but I can't find them. > Closing the laptop lid apparently disables the panel's > backlight, but the image is still drawn on the panel; the backlight does > not turn back on when the lid is re-opened. > Running `xrandr --output VGA --off` does the right thing; `xrandr > -output VGA --auto` restores external output. So, having booted with > the external screen attached everything works, modulo the backlight > being permanently off if the lid has ever been closed. (Should I file a > separate bug about this?) > I don't want to mix different problems here, so I'd rather have another bug about this. > Section "Monitor" > Identifier "Generic Monitor" > Option "DPMS" > HorizSync 30-70 > VertRefresh 50-160 > EndSection > Just in case, you might want to remove HorizSync and VertRefresh above. And the "Modes" line below may be dropped too. > Section "Screen" > Identifier "Default Screen" > Device "Intel Corporation 82852/855GM Integrated Graphics > Device" > Monitor "Generic Monitor" > DefaultDepth 24 > > SubSection "Display" > Depth 24 > Modes "1680x1050" "1600x1200" "1280x1024" "1024x768" "800x600" > "640x480" > Virtual 2048 2048 > EndSubSection > EndSection > Brice -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
