Difference between revisions of "USB input/output error"
(New page: Category:Engineering You get an "Input/output" error when trying to connect to a USB CDC-ACM device. These devices include, USB modems, mobile phones, and any USB device that uses Hey...) |
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| − | + | Read this if you get "Input/output" errors when trying to use a USB device with a CDC-ACM class interface (RS-232 serial link emulation). These devices include USB-to-RS232 adapters, USB modems, mobile phone tethers, and USB devices that use Heyes modem "AT" style commands. | |
| − | The `minicom` command | + | The `minicom` command gives this error: |
<pre> | <pre> | ||
minicom: cannot open /dev/ttyACM0: Input/output error | minicom: cannot open /dev/ttyACM0: Input/output error | ||
</pre> | </pre> | ||
| − | The `screen` command | + | The `screen` command gives this error: |
<pre> | <pre> | ||
Cannot open line '/dev/ttyACM0' for R/W: Input/output error | Cannot open line '/dev/ttyACM0' for R/W: Input/output error | ||
| Line 15: | Line 15: | ||
</pre> | </pre> | ||
| − | The `kmobiletools` command will | + | The `kmobiletools` command will simply fail to connect to your mobile phone without a distinct error. |
'''The problem is with your USB hub or host adapter.''' | '''The problem is with your USB hub or host adapter.''' | ||
Unplug the device and plug it into a different hub or USB port on your system. That will usually fix the problem. If you only have a few ports and no hub then it means your host adapter is confused. The only solution I have found is to reboot. | Unplug the device and plug it into a different hub or USB port on your system. That will usually fix the problem. If you only have a few ports and no hub then it means your host adapter is confused. The only solution I have found is to reboot. | ||
Latest revision as of 22:42, 23 February 2010
Read this if you get "Input/output" errors when trying to use a USB device with a CDC-ACM class interface (RS-232 serial link emulation). These devices include USB-to-RS232 adapters, USB modems, mobile phone tethers, and USB devices that use Heyes modem "AT" style commands.
The `minicom` command gives this error:
minicom: cannot open /dev/ttyACM0: Input/output error
The `screen` command gives this error:
Cannot open line '/dev/ttyACM0' for R/W: Input/output error Sorry, could not find a PTY [screen is terminating]
The `kmobiletools` command will simply fail to connect to your mobile phone without a distinct error.
The problem is with your USB hub or host adapter.
Unplug the device and plug it into a different hub or USB port on your system. That will usually fix the problem. If you only have a few ports and no hub then it means your host adapter is confused. The only solution I have found is to reboot.
