#10210 NORM 10.1.3: Make SISUSBVGA devices trivial to use

[Zarro Boogs per Child]

#10210: Make SISUSBVGA devices trivial to use
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           Reporter:  martin.langhoff  |       Owner:  martin.langhoff
               Type:  enhancement      |      Status:  assigned       
           Priority:  normal           |   Milestone:  10.1.3         
          Component:  olpc-utils       |     Version:  not specified  
         Resolution:                   |    Keywords:                 
        Next_action:  never set        |    Verified:  0              
Deployment_affected:                   |   Blockedby:                 
           Blocking:                   |  
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Comment(by greenfeld):

 Tested the above test RPM above both with and without the 16-bit patch.
 Verified that the USB-2.0 hub seemed to be used within the XO 1.5 for the
 VGA interface.  Lots of little things were discovered:

  1. If anything, I saw less glitching happening with the 16-bit patch, but
 it still happens in certain activities and situations where a lot of data
 is rapidly sent to the screen for a large picture or animation, etc., but
 then suddenly stops (Moon, Browse, etc.).

  2. Unplugging the USB device and plugging it in another port after a
 delay works.  You might have to move the mouse though to repaint the
 external screen.

  3. While the laptop screen sleep is disabled, the external screen still
 eventually sleeps (perhaps due to the X screensaver extension?).

  4. Even without the 16-bit patch, there is random noise displayed when
 switching back and forth between a text console and the X server. This
 noise takes a few seconds to go disappear.

  5. Likewise when one presses the power button once to suspend the laptop,
 random noise is displayed instead of the instructional graphic on what to
 do next.  This noise does not go away in any useful timeframe.

  6. We do not constrain the mouse cursor on the laptop to the new desktop
 area when the VGA USB device is running.  It might be slightly useful if
 we could.

  7. The Pippy Activity does not resize cleanly for a 1024x768 screen.  One
 loses the control buttons in the middle as they become vertically crushed.

  8. The difference in color (temperature?) between the LCD we have in
 Miami and the laptop can be very noticeable with certain colors
 (especially yellow).  This may not be a bug though if we cannot compensate
 for it.

  9. I had an overscan issue where the right edge of the external screen
 was being cut off.  Telling the LCD to recalibrate itself on the signal
 fixed this, but I do not know if we are allowing enough of a syncing
 interval around our VGA output, nor would know how to figure that out.

  10. A brief check with the GNOME environment suggested everything was
 working there (apart from the same keyboard missing glyphs), and might
 actually be a bit more snappy than using Sugar.

  11. A few alternate keyboard glyphs still are unreachable (more or less
 everything reached via Alt-Gr in the space-bar row at the bottom of the
 keyboard of a HS XO-1.5, and the same glyphs on a non-HS 1.5) but pretty
 much everything else on the US-style English keyboard works. [[BR]][[BR]]
 I asked around and we apparently do not have a non-US XO 1.5 in Miami to
 test with, or Martin may have the only one (or it's eluding me).

-- 
Ticket URL: <http://dev.laptop.org/ticket/10210#comment:19>
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