Communication Error - more testing

kgn · 07-14-2010, 07:47 AM

Since upgrading to V0.7.8 I have been getting Communications errors at the end of the device read in process. This happens 3 out of 4 times - ie for all practical purposes, ALL the time (because it takes 15 minutes for each attempt, I usually give up after 45 minutes!).

This is running on Vista 64. On this very same machine, I am also running VMWare images, into one of which (Windows 7) I have installed Calibre. To be clear - this means it is using the same hardware exactly.

I started off with 0.6.55 and worked my way up
0.6.55 - worked perfectly
0.7.1 - seemed to work, but way too slow. Took 27min for only 33%. Gave up.
0.7.2 - worked fine, but did not see the SDHC card on the reader.
0.7.3 - worked fine. No errors.
0.7.4 - works. Some other errors though
0.7.5 - works. Other errors and crashes often though
0.7.6 - works. So far seems to be the best version. No crashes yet.

So it would look like 0.7.8 has introduced some bug.

kovidgoyal · 07-14-2010, 09:49 AM

As I said before, 0.7.x does a lot more when interfacing with devices. This is probably triggering an underlying hardware fault in your reader. Either get a new reader or stick with 0.6.x

kgn · 07-14-2010, 09:52 PM

Well, 0.7.3, 0.7.4, 0.7.5 and 0.7.6 work just fine. So it is NOT a simple 0.6 vs 0.7 problem. Mind you, it could still be my Vista 64. The versions that work are in Win 7 (32).

It seems to be the 32 gig SDHC that seems to be triggering the problem. At least, that is where the error seems to occur. I might switch the SDHC next.

kovidgoyal · 07-14-2010, 10:39 PM

Most devices have problems with cards larger than 8GB, though I have no personal experience with the PB.

07-14-2010, 07:47 AM	#1
kgn Groupie Posts: 171 Karma: 94 Join Date: May 2010 Location: Brisbane, Australia Device: Pocketbook 302	Communication Error - more testing Since upgrading to V0.7.8 I have been getting Communications errors at the end of the device read in process. This happens 3 out of 4 times - ie for all practical purposes, ALL the time (because it takes 15 minutes for each attempt, I usually give up after 45 minutes!). This is running on Vista 64. On this very same machine, I am also running VMWare images, into one of which (Windows 7) I have installed Calibre. To be clear - this means it is using the same hardware exactly. I started off with 0.6.55 and worked my way up 0.6.55 - worked perfectly 0.7.1 - seemed to work, but way too slow. Took 27min for only 33%. Gave up. 0.7.2 - worked fine, but did not see the SDHC card on the reader. 0.7.3 - worked fine. No errors. 0.7.4 - works. Some other errors though 0.7.5 - works. Other errors and crashes often though 0.7.6 - works. So far seems to be the best version. No crashes yet. So it would look like 0.7.8 has introduced some bug. Last edited by kgn; 07-14-2010 at 09:54 PM. Reason: more testing done

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07-14-2010, 09:49 AM	#2
kovidgoyal creator of calibre Posts: 45,156 Karma: 27110894 Join Date: Oct 2006 Location: Mumbai, India Device: Various	As I said before, 0.7.x does a lot more when interfacing with devices. This is probably triggering an underlying hardware fault in your reader. Either get a new reader or stick with 0.6.x

07-14-2010, 09:52 PM	#3
kgn Groupie Posts: 171 Karma: 94 Join Date: May 2010 Location: Brisbane, Australia Device: Pocketbook 302	Well, 0.7.3, 0.7.4, 0.7.5 and 0.7.6 work just fine. So it is NOT a simple 0.6 vs 0.7 problem. Mind you, it could still be my Vista 64. The versions that work are in Win 7 (32). It seems to be the 32 gig SDHC that seems to be triggering the problem. At least, that is where the error seems to occur. I might switch the SDHC next.

07-14-2010, 10:39 PM	#4
kovidgoyal creator of calibre Posts: 45,156 Karma: 27110894 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Most devices have problems with cards larger than 8GB, though I have no personal experience with the PB.

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