[support-gang] using usb2vga with 11.2.0 and 10.1.3

[Kevin Gordon]

Last update for today, promise :-)

On a fresh install of os23 on any of my XO 1.0's, (without moving the .ko
driver) with a VGA adapter , doing this first time try booting using 'boot'
from OFW,  the system will most often hang on the set localhost line right
after the [13.xxxxxxx]  'Allocated 8 output buffers' USB line.  If it hangs
right here,  if I now unplug the VGA adapter it continues to boot.

 If instead, the console lines on an OFW boot continue through the
[14.xxxxx]  and hang on the diisplay of libertas lines, then removing the
VGA adapter does not cause the boot to continue.  It sits there unhappily
idle.

So bottom line ruight now is that the 'workaround' for the intermittent
problem listed as in the ticket does not carry forward to 11.2.  I cannot
get it to give VGA outputon an XO 1.0 on build 11.2, at all.  External power
is in, and the VGA display is ready for all the above tests.

Awaiting more orders.

Cheers

KG



On Wed, Jun 22, 2011 at 7:39 AM, Kevin Gordon <kgordon420 at gmail.com> wrote:

> Update:
>
> rather than power off, I decided to do another ctl-alt-f2 at the snag of
> the 'stall point' below, and got a bash prompt,
>
> entering  stop prefdm there then returns "unknown instance" and a bash
> prompt
>
> tried the insmod tests from there, loaded successfully with the following
> output:
>
> usb 1-2: USB2VGA dongle found at address 3
> usb 1-2: Allocated 8 output buffers
> usb 1-2: 8Mb 1 ch/1 r SDR SDRAM, bus width 32
> usbcore: registered new interface driver sisusb
>
> tried the rmmod, got the following output:
>
> usbcore: deregistering interface driver sisusb
>
> did it about 10 times with various 1-10 second waits before and after each
> step,  always results as above.
>
> KG
>
>
>
>
>
>
>
>
>
> On Wed, Jun 22, 2011 at 7:23 AM, Kevin Gordon <kgordon420 at gmail.com>wrote:
>
>> DSD:
>>
>> Hit a snag on your method below:
>>
>> Moved the .ko
>>
>> rebooted
>>
>> rebooted with USBVGA2 plugged in, booted successfully with no VGA display,
>> as you predicted
>>
>> ctl-alt-f2
>>
>> hit enter to login, gives me the bash # prompt
>>
>> entering stop prefdm at the prompt does not then return a # prompt, just
>> shoots a bunch of text console lines, ending with
>>
>> Starting crond:
>> [21.486698] input: olpc-kbdshim virtual input as
>> /devices/virtual/input/input6
>> [97.220326] dcon_freeze_store: 0
>>
>> any subsequent input echoes but does nothing, have to power off by the
>> power button
>>
>> Any suggestions?
>>
>>
>>
>>
>> More specific instructions for this:
>>
>>>
>>> Boot without USBVGA connector attached. Go to a root terminal and move
>>> sisusbvga.ko to /root:
>>> # mv /lib/modules/*/kernel/drivers/usb/misc/sisusbvga/sisusbvga.ko /root
>>>
>>> Power off the system, connect USBVGA, boot. It should boot
>>> successfully, but without any VGA output. Press ctrl+alt+f2 to get to
>>> a root terminal, and stop X/sugar with:
>>> # stop prefdm
>>>
>>> Now load the sisusbvga driver manually and see if it hangs:
>>> # insmod /root/sisusbvga.ko
>>>
>>> Wait a few seconds, see if the system is hung or if you can still type
>>> on the console.
>>>
>>> If you can still type, unload the module:
>>> # rmmod sisusbvga
>>>
>>> and now try loading/unloading a few more times with a few seconds
>>> pause between each step.
>>> # insmod /root/sisusbvga.ko
>>> ...
>>> # rmmod sisusbvga
>>> ...
>>> # insmod /root/sisusbvga.ko
>>> ...
>>> # rmmod sisusbvga
>>> ...
>>> etc
>>>
>>> The idea is to find out whether the system hang is caused by the
>>> loading of sisusbvga. It might not hang first time, may require a few
>>> attempts, hence the repeated loading.
>>>
>>> Thanks,
>>> Daniel
>>>
>>
>>
>
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