I have a low end Android tablet running Android 4.4 KitKat. It has a 32GB microSD card installed, and my tablet eBook library lives there. I use Calibre to transfer eBooks to the tablet via a USB cable to my desktop.
The desktop was recently upgraded from Win7 Pro to Win10 Pro. That was problematic, but I was able to get most issues resolved. However, Win10 has been presenting me with new and different Blue Screens of Death.
One sure way to produce one is connect the tablet via USB. Connect the tablet to the desktop, and turn on USB Storage in the tablet. Android dismounts the microSD card and the internal SD card carved out of device flash, and both show up as drives in Windows. In my case, M: is the internal SD card, and N: is the external 32GB microSD card.
I can select N: in Windows and use Explorer to navigate it and transfer files to it. When I turn off USB storage on the tablet, the drives should be remounted by the table (they are) and disappear from Windows (they don't.) Any subsequent drive operations are likely to hang the desktop and require a restart.
I dual boot Windows and Ubuntu Linux. A restart from Windows into Ubuntu should take about a minute total, with about 15 seconds required to exit Windows and get to the BIOS for the next step. In the weird state, I can't restart. An attempt to do so will appear to hang the desktop. If I wait long enough, I get a BSOD screen talking about DRIVER_POWER_STATE_FAILURE, and Windows collects data and restarts. If I boot into Ubuntu, it can't mount the Windows file systems, thinking they are dirty. If I reboot back into Windows, that gets cleared up, and I can restart into Ubuntu and access the Windows file systems from it in a normal manner.
In the most recent test, I connected the tablet, turned on USB Storage, and ran Calibre to do eBook maintenance. Calibre saw drive N:, but attempting to select the eBook directory there seemed to do nothing. I normally expect Calibre to read the tablet metadata to see what books are already there, but that process never started.
I exited Calibre, and immediately tried to restart the PC. I got the hang and then the DRIVER_POWER_STATE_FAILURE BSOD again.
I have Calibre installed under Linux as well, and everything works fine there. Worst case, I can simply boot into Ubuntu to do eBook maintenance on the tablet. And it worked reliably under Win7 Pro. Connecting the tablet to the PC also appears to work reliably on my SO's upgraded from Win7 Win 10 Home laptop, and on an older travel laptop upgraded from Win7 Home to Win10 Home. Whatever it is is specific to my desktop.
What I'm curious about at this point is Calibre's failure to initiate a metadata read on the tablet to see what books are already installed. I don't see any error indications - it just doesn't occur.
Suggestions for debugging within Calibre to see why not are welcomed.
______
Dennis
The desktop was recently upgraded from Win7 Pro to Win10 Pro. That was problematic, but I was able to get most issues resolved. However, Win10 has been presenting me with new and different Blue Screens of Death.
One sure way to produce one is connect the tablet via USB. Connect the tablet to the desktop, and turn on USB Storage in the tablet. Android dismounts the microSD card and the internal SD card carved out of device flash, and both show up as drives in Windows. In my case, M: is the internal SD card, and N: is the external 32GB microSD card.
I can select N: in Windows and use Explorer to navigate it and transfer files to it. When I turn off USB storage on the tablet, the drives should be remounted by the table (they are) and disappear from Windows (they don't.) Any subsequent drive operations are likely to hang the desktop and require a restart.
I dual boot Windows and Ubuntu Linux. A restart from Windows into Ubuntu should take about a minute total, with about 15 seconds required to exit Windows and get to the BIOS for the next step. In the weird state, I can't restart. An attempt to do so will appear to hang the desktop. If I wait long enough, I get a BSOD screen talking about DRIVER_POWER_STATE_FAILURE, and Windows collects data and restarts. If I boot into Ubuntu, it can't mount the Windows file systems, thinking they are dirty. If I reboot back into Windows, that gets cleared up, and I can restart into Ubuntu and access the Windows file systems from it in a normal manner.
In the most recent test, I connected the tablet, turned on USB Storage, and ran Calibre to do eBook maintenance. Calibre saw drive N:, but attempting to select the eBook directory there seemed to do nothing. I normally expect Calibre to read the tablet metadata to see what books are already there, but that process never started.
I exited Calibre, and immediately tried to restart the PC. I got the hang and then the DRIVER_POWER_STATE_FAILURE BSOD again.
I have Calibre installed under Linux as well, and everything works fine there. Worst case, I can simply boot into Ubuntu to do eBook maintenance on the tablet. And it worked reliably under Win7 Pro. Connecting the tablet to the PC also appears to work reliably on my SO's upgraded from Win7 Win 10 Home laptop, and on an older travel laptop upgraded from Win7 Home to Win10 Home. Whatever it is is specific to my desktop.
What I'm curious about at this point is Calibre's failure to initiate a metadata read on the tablet to see what books are already installed. I don't see any error indications - it just doesn't occur.
Suggestions for debugging within Calibre to see why not are welcomed.
______
Dennis
