Comment 1 for bug 920695

Hi Vectorio,

Thanks for reporting this bug here. Yes this need to be really concerned for the Linux drivers. I been working on it for a while.
This problem happens when the printer goes into sleep state (or not in use for long time) and the driver does not receive any message from the printer and the USB channel gets freezed . When you launch the toolbox it tries to query the printer to update the status and the channel doesn't get open for communication and hence gives the communication error.
Also this does not happen all the time when you have single print queue opened for this device in the system-config-printer utility.

Will be working on it and make this issue get fixed.

Thanks
Goutam