On Thu, Jul 8, 2010 at 1:14 PM, Martin Langhoff <martin.langh...@gmail.com> wrote: > For monitors/projectors that can handle something close to 1200x900 -- > 1152x864, you can use Xinerama instead. Here is an xorg.conf that does > exactly that:
The Xinerama approach turned out to be a winner in terms of performance and !bugginess. Turns out that with a bit of elbow grease we can make it work on 1024x768 which is what most projectors support. - yum install xorg-x11-drv-sisvga xorg-x11-server-Xephyr - Grab the files from http://dev.laptop.org/~martin/usbvga/xinerama/ olpc-configure goes to /etc/init.d/ , make it executable olpc-session goes to /usr/bin/ , make it executable xorg-xo1.5-dcon-extmon.conf goes to /etc/X11/ - Plug the USB2VGA device - Reboot & Enjoy Limitations and notes: - Needs to be "switched on" at X startup time. olpc-configure checks at boot time if sisusbvga is loaded and changes the xorg.conf symlink if needed. My patch also fixes a longstanding old bug where the xorg.conf was 'set' in the first boot. - The desktop is a little bit smaller. On the XO, the desktop appears in the top-left corner -- on the external monitor / projector it fills up the screen perfectly. - Icons can appear slightly pixellated. I think this technique may expose a bug in Sugar and in some activities (ie: TurtleArt) that keep a copy of rendered SVGs as bitmaps. - Performance is acceptable. (We are saturating the USB 2 bandwidth with the amount of pixels and the bitdepth). - The Sugar cursor is back! - Video works! No Xv however, so it's not particularly fast. Patch to olpc-utils is attached -- I haven't tested the spec changes. cheers, m -- martin.langh...@gmail.com mar...@laptop.org -- School Server Architect - ask interesting questions - don't get distracted with shiny stuff - working code first - http://wiki.laptop.org/go/User:Martinlanghoff
0001-Add-support-for-SiSUSBVGA-devices.patch
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