seg fault and usb bus error for prs500 on OpenSuSE 11

khassounah · 12-30-2008, 07:19 PM

Hello all,

I am facing multiple issues trying to use my prs500 with calibre. I researched the issues here and elsewhere and the none of the solutions seem to work:

1. prs500 seg faults with the message:
/usr/bin/prs500: line 7: 3698 Segmentation fault $loader "$@"

The suggested solution was to insure that none of the files in /opt/calibre exist in /usr/bin. All the files in /usr/bin are symbolic links to /opt/calibre so that doesn't seem to be the problem.
The command still seems to execute even with the seg fault at the end, so I am assuming that this problem is not as critical as the next one.

2. Trying to communicate the e-reader (with a command like "prs500 ls /") give the following error:
calibre.devices.libusb.Error: Could not read 32 bytes on the control bus.

The suggested solution was to disconnect and reconnect the device, or reboot it. I have done all of that in addition to rebooting my laptop and I still have the same problem.

3. Calibre can't detect my device, but I'm assuming that it is because of the default permissions to access the usb device, so I will try that fix before asking for help, but mentioning it in case someone has any additional hints or ideas.

Thank you all in advance. Calibre came a long way since I last used libprs500.... I hope I can get to use it soon.

Khaled

kovidgoyal · 12-30-2008, 07:29 PM

Quote:

Originally Posted by khassounah

2. Trying to communicate the e-reader (with a command like "prs500 ls /") give the following error:
calibre.devices.libusb.Error: Could not read 32 bytes on the control bus.

Khaled

That error indicates a problem talking to the device. Hard resetting the device/laptop and trying other USB cables/ports is really the only thing you can do. One other thing that comes to mind is to make sure that your device password is not set.

khassounah · 12-30-2008, 07:45 PM

Thanks for the quick reply. I hard-reset the device, rebooted my laptop and I don't have a password on the device and I still get the error :-\

Do you know if this is a libprs error or if it's coming from a lower layer?

K

khassounah · 12-30-2008, 07:50 PM

in case someone stumbles upon this thread, problem #3 was solved by following kovidgoyal's suggestion from another thread and replacing the group in /etc/udev/rules.d/95-calibre.rules with a group that my user is a member of.

Thanks Kovidgoyal!

Khaled

kovidgoyal · 12-30-2008, 10:04 PM

It's not a libprs error. It indicates what is most liely a hardware problem or a problem with the USB stack on either your computer or the device.

12-30-2008, 07:19 PM	#1
khassounah Junior Member Posts: 3 Karma: 10 Join Date: Dec 2008 Device: prs500	seg fault and usb bus error for prs500 on OpenSuSE 11 Hello all, I am facing multiple issues trying to use my prs500 with calibre. I researched the issues here and elsewhere and the none of the solutions seem to work: 1. prs500 seg faults with the message: /usr/bin/prs500: line 7: 3698 Segmentation fault $loader "$@" The suggested solution was to insure that none of the files in /opt/calibre exist in /usr/bin. All the files in /usr/bin are symbolic links to /opt/calibre so that doesn't seem to be the problem. The command still seems to execute even with the seg fault at the end, so I am assuming that this problem is not as critical as the next one. 2. Trying to communicate the e-reader (with a command like "prs500 ls /") give the following error: calibre.devices.libusb.Error: Could not read 32 bytes on the control bus. The suggested solution was to disconnect and reconnect the device, or reboot it. I have done all of that in addition to rebooting my laptop and I still have the same problem. 3. Calibre can't detect my device, but I'm assuming that it is because of the default permissions to access the usb device, so I will try that fix before asking for help, but mentioning it in case someone has any additional hints or ideas. Thank you all in advance. Calibre came a long way since I last used libprs500.... I hope I can get to use it soon. Khaled

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12-30-2008, 07:45 PM	#3
khassounah Junior Member Posts: 3 Karma: 10 Join Date: Dec 2008 Device: prs500	Thanks for the quick reply. I hard-reset the device, rebooted my laptop and I don't have a password on the device and I still get the error :-\ Do you know if this is a libprs error or if it's coming from a lower layer? K

12-30-2008, 07:50 PM	#4
khassounah Junior Member Posts: 3 Karma: 10 Join Date: Dec 2008 Device: prs500	in case someone stumbles upon this thread, problem #3 was solved by following kovidgoyal's suggestion from another thread and replacing the group in /etc/udev/rules.d/95-calibre.rules with a group that my user is a member of. Thanks Kovidgoyal! Khaled

12-30-2008, 10:04 PM	#5
kovidgoyal creator of calibre Posts: 45,149 Karma: 27110894 Join Date: Oct 2006 Location: Mumbai, India Device: Various	It's not a libprs error. It indicates what is most liely a hardware problem or a problem with the USB stack on either your computer or the device.

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