Omnimaga

Calculator Community => Casio Calculators => Topic started by: fxdev on May 25, 2011, 06:20:18 pm

Title: Occasional auto-reset after disconnecting from USB
Post by: fxdev on May 25, 2011, 06:20:18 pm: Sometimes when I disconnect from USB, my Prizm will automatically reboot and reset all settings. So far, this happened about 10-15 times. I guess, this is some kind of file system bug, because I'm sending a lot of add-in files to my device - sometimes 5 at once and only with minor modifications (just to test some stuff).

Did anybody experience something similar?

My PC has USB 1.1, runs Windows XP SP3 and I'm always disconnecting via [AC/ON].
Title: Re: Occasional auto-reset after disconnecting from USB
Post by: JosJuice on May 26, 2011, 01:08:02 am: I haven't encountered this, but I usually only send one file at once.
Title: Re: Occasional auto-reset after disconnecting from USB
Post by: m1ac4 on May 26, 2011, 07:45:42 am: I sent everything in a backup once (in other words, a whole main/storage memory's worth of files). I had no problems.
Usually when I try to terminate the connection with the eject option I always get an error message saying that "an error occured when attempting to eject". Despite that error ejecting always works.
Title: Re: Occasional auto-reset after disconnecting from USB
Post by: fxdev on May 31, 2011, 10:06:20 am: Since I did a flash memory optimization, it no longer happens. So, this may have been caused by a high degree of fragmentation.
Title: Re: Occasional auto-reset after disconnecting from USB
Post by: DJ Omnimaga on June 03, 2011, 08:57:25 pm: I didn't either. Maybe it was fragmentation. On the 83+ when the memory is fragmented, it takes a long while to move stuff to the flash.
Title: Re: Occasional auto-reset after disconnecting from USB
Post by: AngelFish on June 04, 2011, 12:51:40 am: It does sound like a file system bug. How much memory are you using? It may crash while trying to allocate the physical memory for the file.
Title: Re: Occasional auto-reset after disconnecting from USB
Post by: fxdev on June 04, 2011, 07:29:42 am: Quote
How much memory are you using?
About 1 MB, but I often replace the same files with newer ones.
Title: Re: Occasional auto-reset after disconnecting from USB
Post by: fxdev on August 17, 2011, 08:42:57 am: This is definitely a bug, because I can now reproduce it after a full device reset. :P
Just connect, replace the same file (but with a different size and timestamp) disconnect and repeat this for about 39 times.

After the crash your log file should look like this:

Code: [Select]
---- LOG INFO ---- [0]:USB PD, 79 [1]:VBUS DC, 77 [2]:VBUS DC, 75 [3]:VBUS DC, 73 [4]:VBUS DC, 71 [5]:VBUS DC, 69 [6]:VBUS DC, 67 [7]:VBUS DC, 65 [8]:VBUS DC, 63 [9]:VBUS DC, 61 [10]:VBUS DC, 59 [11]:VBUS DC, 57 [12]:VBUS DC, 55 [13]:VBUS DC, 53 [14]:VBUS DC, 51 [15]:VBUS DC, 49 [16]:VBUS DC, 47 [17]:VBUS DC, 45 [18]:VBUS DC, 43 [19]:VBUS DC, 41 [20]:VBUS DC, 39 [21]:VBUS DC, 37 [22]:VBUS DC, 35 [23]:VBUS DC, 33 [24]:VBUS DC, 31 [25]:VBUS DC, 29 [26]:VBUS DC, 27 [27]:VBUS DC, 25 [28]:VBUS DC, 23 [29]:VBUS DC, 21 [30]:VBUS DC, 19 [31]:VBUS DC, 17 [32]:VBUS DC, 15 [33]:VBUS DC, 13 [34]:VBUS DC, 11 [35]:VBUS DC, 9 [36]:VBUS DC, 7 [37]:VBUS DC, 5 [38]:VBUS DC, 3
I already informed Casio about it.
Title: Re: Occasional auto-reset after disconnecting from USB
Post by: Eiyeron on August 18, 2011, 05:31:53 am: Great, you can have the even numbers...
Title: Re: Occasional auto-reset after disconnecting from USB
Post by: AHelper on March 18, 2012, 03:57:59 pm: Interesting find. If the flash is horribly fragmented, does the OS prompt to optimize/defragment it, or is it just silently failing? (Just wondering if the OS does this at all)
Title: Re: Occasional auto-reset after disconnecting from USB
Post by: Eiyeron on March 18, 2012, 04:14:26 pm: I think silently...
Title: Re: Occasional auto-reset after disconnecting from USB
Post by: fxdev on March 19, 2012, 01:26:21 pm: Quote from: AHelper on March 18, 2012, 03:57:59 pm
Interesting find. If the flash is horribly fragmented, does the OS prompt to optimize/defragment it, or is it just silently failing? (Just wondering if the OS does this at all)
On legacy models, you sometimes see a "Fragmentation ERROR". I didn't spot it on the Prizm yet.
Title: Re: Occasional auto-reset after disconnecting from USB
Post by: fxdev on March 21, 2012, 04:38:06 pm: I tried for hours to find an exact (and simpler) pattern to reproduce this, but I give up on this.

The OS is full of small little issues and I no longer have the patience and time to keep struggling with the Casio support, which seems to be unable to understand my technical reports.

I don't care what they do with the Prizm or fx-9860G.
Someday, I will throw away the entire OS and put a custom one on them. :P
Title: Re: Occasional auto-reset after disconnecting from USB
Post by: Eiyeron on March 22, 2012, 02:32:46 pm: Fragmentation Error... Never saw that!

Anyway, we should develop as fast as possible our own OS, just for the screen cap for example
Title: Re: Occasional auto-reset after disconnecting from USB
Post by: DJ Omnimaga on March 22, 2012, 04:09:58 pm: Quote from: cfxm on March 21, 2012, 04:38:06 pm
I tried for hours to find an exact (and simpler) pattern to reproduce this, but I give up on this.

The OS is full of small little issues and I no longer have the patience and time to keep struggling with the Casio support, which seems to be unable to understand my technical reports.

I don't care what they do with the Prizm or fx-9860G.
Someday, I will throw away the entire OS and put a custom one on them. :P
I personally would not bother with them. When I e-mailed them once about the Locate bug, they were not even able to open a Youtube video to see a demo of the problem and they barely understood what I meant.

And lol a new OS would rule :D