It turned out that I have put a SanDisk 4GB microSD card in and planned to copy 
the images on the card to M1, but M1 seemed couldn't read the card, so it hung 
at "I: Booting from filesystem...". Now I ran "sudo ./reflash_m1.sh  --snapshot 
milkymist-firmware-11282011-0543" again and took the card out, everything 
worked again.

One thing I found out is:

1. In M1 GUI, click on "Shutdown" button. Shutdown windows pops up.
2. In Shutdown window, click on "Shutdown" button, M1 rebooted instead of 
shutting down.
3. So I unplugged the power cable, replugged the power cable and M1 started 
fine.
4. I tried Shutdown again, and this time M1 didn't go back as it suppose to. 
5. I plugged USB cable to Serial board, ran "cat /dev/ttyUSB0", then saw error 
messages "USB: HC: RX timeout error"
6. I unplugged and replugged power cable, M1 started fine again

I don't know why the second time on, rebooting didn't work any more, I hope the 
error messages I got could give you a hind of the reason. 2nd, I think we do 
need to change the "Shutdown" text to "Reboot".

Since my microSD card doesn't work on M1, I will need to find a way to copy 
images to M1.

Thanks,
Yi

On Nov 28, 2011, at 8:49 PM, Sébastien Bourdeauducq wrote:

> Hi,
> 
> Turns out the FPGA is acting up when the "auto-on" standby bitstream switches 
> to the SoC bitstream too rapidly... and reconfiguration fails intermittently. 
> I worked around this problem by adding a few dozen milliseconds of delay, and 
> uploaded a new standby.fpg. Can you reflash and confirm your problems are 
> gone? Or at least some of them, I don't know why you still have problems with 
> D2 lit... maybe some RTEMS patches are missing from Xiangfu's build?
> 
> Note that with the new standby.fpg the M1 is always on... long press on the 
> middle button in the GUI now reboots.
> 
> Sébastien
> 
> On 11/28/2011 12:05 PM, Yi Zhang wrote:
>> Hi Xiangfu,
>> 
>> I have tried the new snapshot.
>> 
>> $ wget https://raw.github.com/milkymist/scripts/master/scripts/reflash_m1.sh
>> $ chmod +x reflash_m1.sh
>> $ sudo ./reflash_m1.sh  --snapshot milkymist-firmware-11282011-0543
>> 
>> The reflash was successful (Version of me: 2011-11-28). After reflash, I 
>> pressed the middle button to power on M1, it went into patch rendering as 
>> expected. I then shut down M1.
>> 
>> 1) The middle LED kept on. It didn't turn off. Is this auto-on feature?
>> 2) I pressed middle button and waited for 2 minutes, nothing happened.
>> 3) Then I unplugged the power supply, waited 20 seconds, then replugged 
>> power plug, both D1, D2 LED have lit. Is this new auto-on feature? However I 
>> waited for 2 minutes, nothing happened. My projector shows "No Signal".
>> 4) I pressed middle button and waited for another 2 minutes, still nothing 
>> happened.
>> 
>> Have your experience the same things or have I don't anything wrong?
>> 
> _______________________________________________
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