<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Martin,<div><br></div><div>Esteban found that xorg-x11-drv-sisvga is not available but xorg-x11-drv-sisusb is available. Using xorg-x11-drv-sisusb worked fine.</div><div><br></div><div>Reuben</div><div><br><div><br><div>Begin forwarded message:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; ">Message: 2<br>Date: Fri, 9 Jul 2010 17:18:47 -0400<br>From: Martin Langhoff <<a href="mailto:martin.langhoff@gmail.com">martin.langhoff@gmail.com</a>><br>Subject: Re: USB2VGA adapters on XO-1.5 (and XO-1 with F11 images)<br>To: OLPC Devel <<a href="mailto:devel@lists.laptop.org">devel@lists.laptop.org</a>><br>Cc: Sridhar Dhanapalan <<a href="mailto:sridhar@laptop.org.au">sridhar@laptop.org.au</a>>,<span class="Apple-converted-space"> </span><a href="mailto:sandra@laptop.org">sandra@laptop.org</a>,<br><span class="Apple-tab-span" style="white-space: pre; "> </span>Keith Wilbern <<a href="mailto:kwilbern@gmail.com">kwilbern@gmail.com</a>>,<span class="Apple-converted-space"> </span><a href="mailto:rsmith@laptop.org">rsmith@laptop.org</a><br>Message-ID:<br><span class="Apple-tab-span" style="white-space: pre; "> </span><<a href="mailto:AANLkTik-oFL5gC9Roq2J97wQLysmjlJG94rTjOYN8ow7@mail.gmail.com">AANLkTik-oFL5gC9Roq2J97wQLysmjlJG94rTjOYN8ow7@mail.gmail.com</a>><br>Content-Type: text/plain; charset="iso-8859-1"<br><br>On Thu, Jul 8, 2010 at 1:14 PM, Martin Langhoff<br><<a href="mailto:martin.langhoff@gmail.com">martin.langhoff@gmail.com</a>> wrote:<br><blockquote type="cite">For monitors/projectors that can handle something close to 1200x900 --<br></blockquote><blockquote type="cite">1152x864, you can use Xinerama instead. Here is an xorg.conf that does<br></blockquote><blockquote type="cite">exactly that:<br></blockquote><br>The Xinerama approach turned out to be a winner in terms of<br>performance and !bugginess.<br><br>Turns out that with a bit of elbow grease we can make it work on<br>1024x768 which is what most projectors support.<br><br>- yum install xorg-x11-drv-sisvga xorg-x11-server-Xephyr<br><br>- Grab the files from<span class="Apple-converted-space"> </span><a href="http://dev.laptop.org/~martin/usbvga/xinerama/">http://dev.laptop.org/~martin/usbvga/xinerama/</a><br> olpc-configure goes to /etc/init.d/ , make it executable<br> olpc-session goes to /usr/bin/ , make it executable<br> xorg-xo1.5-dcon-extmon.conf goes to /etc/X11/<br><br>- Plug the USB2VGA device<br><br>- Reboot & Enjoy<br><br>Limitations and notes:<br><br>?- Needs to be "switched on" at X startup time. olpc-configure checks<br>at boot time if sisusbvga is loaded and changes the xorg.conf symlink<br>if needed. My patch also fixes a longstanding old bug where the<br>xorg.conf was 'set' in the first boot.<br><br>?- The desktop is a little bit smaller. On the XO, the desktop<br>appears in the top-left corner -- on the external monitor / projector<br>it fills up the screen perfectly.<br><br> - Icons can appear slightly pixellated. I think this technique may<br>expose a bug in Sugar and in some activities (ie: TurtleArt) that keep<br>a copy of rendered SVGs as bitmaps.<br><br>?- Performance is acceptable. (We are saturating the USB 2 bandwidth<br>with the amount of pixels and the bitdepth).<br><br>- The Sugar cursor is back!<br><br>- Video works! No Xv however, so it's not particularly fast.<br><br>Patch to olpc-utils is attached -- I haven't tested the spec changes.<br><br>cheers,<br><br><br>m<br>--<span class="Apple-converted-space"> </span><br><a href="mailto:?martin.langhoff@gmail.com">?martin.langhoff@gmail.com</a><br><a href="mailto:?martin@laptop.org">?martin@laptop.org</a><span class="Apple-converted-space"> </span>-- School Server Architect<br>?- ask interesting questions<br>?- don't get distracted with shiny stuff? - working code first<br>?-<span class="Apple-converted-space"> </span><a href="http://wiki.laptop.org/go/User:Martinlanghoff">http://wiki.laptop.org/go/User:Martinlanghoff</a></span></blockquote></div><br></div></body></html>