#10568 LOW 11.3.0: XO-1 graphical boot hangs if SISUSB VGA adapter attached

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#10568: XO-1 graphical boot hangs if SISUSB VGA adapter attached
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           Reporter:  greenfeld    |       Owner:  dsd                               
               Type:  defect       |      Status:  new                               
           Priority:  low          |   Milestone:  11.3.0                            
          Component:  initscripts  |     Version:  Development source as of this date
         Resolution:               |    Keywords:                                    
        Next_action:  diagnose     |    Verified:  0                                 
Deployment_affected:               |   Blockedby:                                    
           Blocking:               |  
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Comment(by greenfeld):

 Moved the kernel module out of the way, booted an XO-1, stopped prefdm,
 and manually insmod'd sisusbvga later.

 If the USB2VGA adapter was inserted while the computer was turned on, the
 following lines are seen, followed by insmod hanging:
 {{{
 [  840.586868] usb 2-2: new high speed USB device using ehci_hcd and
 address 3
 [  851.641357] usb 2-2: USB2VGA dongle found at address 3
 [  851.658333] usb 2-2: Allocated 8 output buffers
 }}}

 If the USB2VGA adapter is inserted after the computer fully boots and the
 above steps were taken, the following two additional dmesg lines appear in
 addition to the three above:
 {{{
 [  851.854686] usb 2-2: 8MB 1 ch/1 r SDR SDRAM, bus width 32
 [  852.799084] usbcore: registered new interface driver sisusb
 }}}

-- 
Ticket URL: <http://dev.laptop.org/ticket/10568#comment:10>
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