Re: USB2VGA adapters on XO-1.5 (and XO-1 with F11 images)
On XO-1? Or XO-1.5? Maybe I typo'ed the rpm name... m On Fri, Jul 16, 2010 at 12:07 PM, Reuben K. Caron reu...@laptop.org wrote: Martin, Esteban found that xorg-x11-drv-sisvga is not available but xorg-x11-drv-sisusb is available. Using xorg-x11-drv-sisusb worked fine. Reuben Begin forwarded message: Message: 2 Date: Fri, 9 Jul 2010 17:18:47 -0400 From: Martin Langhoff martin.langh...@gmail.com Subject: Re: USB2VGA adapters on XO-1.5 (and XO-1 with F11 images) To: OLPC Devel devel@lists.laptop.org Cc: Sridhar Dhanapalan srid...@laptop.org.au, san...@laptop.org, Keith Wilbern kwilb...@gmail.com, rsm...@laptop.org Message-ID: aanlktik-ofl5gc9roq2j97wqlysmjljg94rtjoyn8...@mail.gmail.com Content-Type: text/plain; charset=iso-8859-1 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 -- 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 ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: USB2VGA adapters on XO-1.5 (and XO-1 with F11 images)
XO 1.5 Thanks, Reuben On Jul 16, 2010, at 12:46 PM, Martin Langhoff wrote: On XO-1? Or XO-1.5? Maybe I typo'ed the rpm name... m On Fri, Jul 16, 2010 at 12:07 PM, Reuben K. Caron reu...@laptop.org wrote: Martin, Esteban found that xorg-x11-drv-sisvga is not available but xorg-x11-drv-sisusb is available. Using xorg-x11-drv-sisusb worked fine. Reuben Begin forwarded message: Message: 2 Date: Fri, 9 Jul 2010 17:18:47 -0400 From: Martin Langhoff martin.langh...@gmail.com Subject: Re: USB2VGA adapters on XO-1.5 (and XO-1 with F11 images) To: OLPC Devel devel@lists.laptop.org Cc: Sridhar Dhanapalan srid...@laptop.org.au, san...@laptop.org, Keith Wilbern kwilb...@gmail.com, rsm...@laptop.org Message-ID: aanlktik-ofl5gc9roq2j97wqlysmjljg94rtjoyn8...@mail.gmail.com Content-Type: text/plain; charset=iso-8859-1 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 -- 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 ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: USB2VGA adapters on XO-1.5 (and XO-1 with F11 images)
On Fri, Jul 9, 2010 at 5:18 PM, Martin Langhoff martin.langh...@gmail.com wrote: The Xinerama approach turned out to be a winner in terms of performance and !bugginess. This ticket tracks the status of this feature (currently working great on xo-1.5) http://dev.laptop.org/attachment/ticket/10210/ Trying this out on an XO-1 / F11 system leads to a segfault (sample config file and logs of the fault in the ticket). I suspect that the Geode driver may not be a good friend of Xinerama. 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 ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: USB2VGA adapters on XO-1.5 (and XO-1 with F11 images)
I suspect that the Geode driver may not be a good friend of Xinerama. My gut instinct is that EXA and Xinerama are not playing well together. Xinerama has been deprecated and replaced with RandR, much like XAA is supposed to be replaced with EXA. XAA and Xinerama are both from about the same era of Xorg legacy and a bit more compatible with each other. What acceleration mode are you using for the SisUSB adapter? This might also be a problem with using EXA and XAA for different drivers. In your log SisUSB doesn't get to the point where it spits out the options that are initialized. I can take a quick look at the sisusb driver to see what it is doing if it will help. Jon ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: USB2VGA adapters on XO-1.5 (and XO-1 with F11 images)
On Wed, Jul 14, 2010 at 4:51 PM, Jon Nettleton jon.nettle...@gmail.com wrote: I suspect that the Geode driver may not be a good friend of Xinerama. My gut instinct is that EXA and Xinerama are not playing well The driver ignored my setting AccelMethod to XAA. It did get the hint with NoAccel, but that hasn't solved the crash. It just takes less time to crash. What acceleration mode are you using for the SisUSB adapter? I don't think it does any kind of acceleration. I can take a quick look at the sisusb driver to see what it is doing if it will help. It's an optional (but cool) feature. Not a blocker in my book. We're hurting a lot more on the rotation side. Speaking of which, ISTR you had a patch that kind of worked but was showing artifacts. Is that anywhere I can find? 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 ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: USB2VGA adapters on XO-1.5 (and XO-1 with F11 images)
On Wed, Jul 7, 2010 at 5:06 PM, Martin Langhoff martin.langh...@gmail.com wrote: Updated olpc-usbvgamirror with tweaks for better performance. For monitors/projectors that can handle 800x600 or 1024x768, the VNC approach is the best we can do. 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: http://dev.laptop.org/~martin/usbvga/xorg-xo1.5-dcon-hires-extmon.conf It is *much* faster than VNC, and plays well with suspend (you'll still want to disable aggressive powersaving). Limitations and notes: - Needs to be switched on at X startup time. olpc-configure could check at boot time if sisusbvga is loaded and change the xorg.conf symlink. - It clips the margins of the desktop. But not very much, if the projector honours the resolution, it's minimal. (Funny enough, if we use 1280x960 but try to constrain it with Virtual, X ignores our Modes line and falls back to 1152x864.) - It hides the cursor -- this is a long-standing Xinerama mirror mode quirk. - It isn't super fast, but the performance is acceptable. (We are saturating the USB 2 bandwidth with the amount of pixels and the bitdepth -- but cannot scale down either.) - Video (via Xv) doesn't work on USB2VGA devices 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 ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: USB2VGA adapters on XO-1.5 (and XO-1 with F11 images)
On Fri, Jul 2, 2010 at 4:53 PM, Martin Langhoff martin.langh...@gmail.com wrote: 2 - From http://dev.laptop.org/~martin/usbvga/ grab xorg-xo1.5-dcon.conf - goes into /etc/X11/ olpc-usbvgamirror - goes into /usr/bin/ - mark it executable! 95-usbvga.rules - goes into /etc/udev/rules.d Updated olpc-usbvgamirror with tweaks for better performance. It still drops off after a while -- with no errors to speak of in any log, which is weird. All processes still running, all looks smooth but there's no VGA output. Odd. 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 ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: USB2VGA adapters on XO-1.5 (and XO-1 with F11 images)
On Fri, Jul 2, 2010 at 4:53 PM, Martin Langhoff martin.langh...@gmail.com wrote: - It is slow and laggy. A VNC protocol expert may be able to help us optimise... Might try some of the VNC encoding options, like those at: http://www.realvnc.com/products/free/4.1/winvncviewer.html#ColorEncoding Assuming you're using a Unix domain or localhost socket, the raw encoding might be best, with # colors matched to the source/dest. - If you look carefully, the mirror session has a small square cursor in the middle of the screen. We need a variant on http://wiki.x.org/wiki/AdvancedTopicsFAQ#Iwanttomakethemousecursorinvisible but I could not make it work. Given how the technique works, I think vncviewer is overriding the root window cursor. This is a feature of vnc -- since the remote system cursor may lag your local cursor, VNC represents your local cursor with a small box, so that any mismatch between local and remote cursors is obvious and visible. The UseLocalCursor option to VNC should affect this. (You also might want to look into AutoReconnect.) I'm using the names of the options in the official vnc viewer, but I think the open source ones have the same options, maybe spelled somewhat differently. --scott -- ( http://cscott.net/ ) ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: USB2VGA adapters on XO-1.5 (and XO-1 with F11 images)
On Wed, Jul 7, 2010 at 5:21 PM, C. Scott Ananian csc...@laptop.org wrote: Might try some of the VNC encoding options, like those at: Yes but no. The documentation doesn't match actual outcomes. Raw segfaults in ugly ways. This is a feature of vnc -- since the remote system cursor may lag Been using VNC for a good number of years :-) -- found a way to disable it but the cursor handling is *very* buggy. I've updated the script today after a bit of testing and fiddling. This probably needs a real VNC expert that can chase / file some bugs... 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 ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: USB2VGA adapters on XO-1.5 (and XO-1 with F11 images)
On Thu, Jul 1, 2010 at 5:00 PM, Martin Langhoff martin.langh...@gmail.com wrote: Consider this a draft for updating our wikipage, or even better a script... Steps: 1 - yum install x11vnc tigervnc xorg-x11-drv-sisvga 2 - From http://dev.laptop.org/~martin/usbvga/ grab xorg-xo1.5-dcon.conf - goes into /etc/X11/ olpc-usbvgamirror - goes into /usr/bin/ - mark it executable! 95-usbvga.rules - goes into /etc/udev/rules.d With all these elements in place, just plug the usb2vga device, and it'll mirror your XO screen. In case of trouble, output is logged in /var/log/vncmirror*.log . To tear the VNC sessions down, just unplug it. Known issues - It is slow and laggy. A VNC protocol expert may be able to help us optimise... - After a while, the client starts complaining of 'zero sized rect' - If you look carefully, the mirror session has a small square cursor in the middle of the screen. We need a variant on http://wiki.x.org/wiki/AdvancedTopicsFAQ#Iwanttomakethemousecursorinvisible but I could not make it work. Given how the technique works, I think vncviewer is overriding the root window cursor. - It consumes significant amount of CPU time... - You may want to disable aggressive suspend -- most of the time the CPU burn keeps the laptop awake. If it doesn't, you lose the device. 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 ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
