Quote:
Originally Posted by Solicitous
Have you had issues writing to usb thumb drives or usb card readers?
Given that you've had troubles with both WinXP and Ubuntu then I would agree with it being hardware, but could you have a mainboard issue?
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Thanks for your reply. In a previous post, I mentioned that I tried to verify that possibility by doing a speed test with a SanDisk Cruzer memory stick. I got 27 MB/sec. read speeds with that, and NO data errors. But just to give your suggestion a fair chance, I plugged a USB2.0 CardBus adapter into my laptop to run a USB2.0 test with a completely different USB2.0 chipset. The results were slightly better than my main PC, but still pretty bad. The SanDisk Cruzer still ran 27MB/sec read speeds, but the PocketPRO had so many errors that USBDview warned that the test had large changes in read/write speeds during the test, and the speeds were down around 1 MB/sec. I was able to transfer some of my own files using the USB2.0 CardBus adapter, but only very slowly. Even so, that was better than my motherboard chipset did.
On my main PC, I also use a USB WebCam, a USB mouse, several USB2.0 external hard disks, a USB printer, and some other USB peripherals occasionally. I tried the PocketPRO on several USB ports on the PC, with other USB perpherals disconnected, and the result is always the same. MY PocketPRO USB works just fine when it is forced down to USB1.1 data rates, and works very poorly, or not all, when it is allowed to use the full USB2.0 speeds, and that is with the provided USB cable with the ferrite filter moulded into it.
To me, all this proves that there is some issue with the USB2.0 hardware on *my* PocketPRO, but the problem has different levels of severity depending up the hardware the PocketPRO is interfacing with. Being an electrical engineer, I have a pretty good idea what the problem is, but those kinds of details are probably not worthwhile to go into on a more general interest forum.
FWIW, I just saw on the MyBeBook site that at least one other person using a BeBook Mini ( a Hanlin V5 which is the same device as the PocketPRO) is having about the same problem as I am having with my PockePRO.