Hello all again! I have found some order within the weird behavior. With the attached xorg.conf, gdm starts in mode 1280x768 (see below for the behavior of this mode), gnome goes up, and it switches to the mode that was last selected within gnome, each having its own behavior. The mode list in gnome's resolution change widget is, in this order:
800x600 720x576 640x480 1280x768 Now, the weird things. In the table below, the Resolution column is the resolution selected with gnome (in gdm it is always 1280x768). For each of them, the VirtualDesk was determined by doing a Screen capture and looking at the size of the image. The xvidtune column is the number reported by this program, that is, X's ModeLine. The column panArea really applies only to the 1280x768 resolution, since it is the only one in which panning is available, because the VirtualDesk is not equal to the xvidtune in that case; note, however, that the panArea seems to be higher than the videomode; I determined this panarea by enlarging a window as much as I could within the panArea, taking a Screen capture of that window, and looking at the size of the image. Finally, viewArea is determined by resizing a window so that it fits the area that I can see in the panel, taking a screen capture of that window, and looking at the image size. Here are the results: Resolution VirtualDesk xvidtune panArea viewArea 1280x768 1280x768 1024x576 1024x640 768x450 800x600 800x600 800x600 no pan 600x466 720x576 720x576 720x576 no pan 541x451 640x480 640x480 640x480 no pan 484x374 It is really wierd. It seems that the panel shows always a percentage of the xvidtune values, about 75% of the horizontal value and about 78% of the vertical value, plus or minus less than 1%. Oddly enough, the 1024x576 xvidtune maximum resolution is exactly 75% of the detected Native Panel Resolution, 1366x768. Trying to force 1024x576 as the highest mode, instead of 1280x768, both Resolution, VirtualDesk, and xvidtune get 1024x576, there is no panning, and the viewArea is about 767x449 pixels, about the same as with the 1280x768 Resolution, other things going the same (except that 800x600 is not available because the VirtualDesk is set to 1024x576 and then the vertical 600 does not fit). Trying to force 800x600, or 720x576, or 640x480 as the one and only mode, I get Resolution, VirtualDesk, and xvidtune as requested, but a viewArea which is more or less the one in the table above, and no panning. I have no explanation for this! I am attaching the xorg.conf for the table values, and the bzip2 Xorg.0.log file (hope they fit the limits of the list rules). Any help is welcome! Miguel
# xorg.conf (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 "InputDevice"
Identifier "Generic Keyboard"
Driver "kbd"
Option "XkbRules" "xorg"
Option "XkbModel" "pc105"
Option "XkbLayout" "es"
EndSection
Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
EndSection
Section "Device"
Identifier "Configured Video Device"
# Driver "unichrome"
Driver "openchrome"
Option "VBESaveRestore" "true"
# Option "VBEModes" "true"
# Option "PanelSize" "1024x600"
# Option "PanelSize" "1024x576"
# Option "ForcePanel" "on"
# Option "EnableAGPDMA" "0"
Option "SWCursor" "True"
Option "XaaNoImageWriteRect" "true"
EndSection
Section "Monitor"
Identifier "Configured Monitor"
ModeLine "1280x768a" 77.37 1280 1344 1480 1680 768 769 772 794
# ModeLine "1024x576a" 46.98 1024 1064 1168 1312 576 576 579 597
DisplaySize 196 114
EndSection
Section "Screen"
Identifier "Default Screen"
Monitor "Configured Monitor"
SubSection "Display"
Virtual 1280 768
# Virtual 1024 600
# Virtual 1024 576
# Virtual 640 480
Depth 24
Modes "1280x768a"
# Modes "1024x576a"
# Modes "720x576"
EndSubSection
EndSection
Xorg.0.log-m.bz2
Description: application/bzip
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