[sane-devel] fujitsu (avision) scanner not being found after some time

2012-11-20 Thread dabicho
Sorry for the time it took me to answer. I had no access to the hardware until now. There is no information on dmesage other than device plug/unplug data. Any other source for kernel messages? Thank you On Fri, Nov 16, 2012 at 6:26 PM, m. allan noah kitno455 at gmail.com wrote: Anything in the

[sane-devel] fujitsu (avision) scanner not being found after some time

2012-11-20 Thread m. allan noah
On Tue, Nov 20, 2012 at 12:40 PM, dabicho tsukebumi at gmail.com wrote: Sorry for the time it took me to answer. I had no access to the hardware until now. There is no information on dmesage other than device plug/unplug data. Any other source for kernel messages? Not usually. Does the

[sane-devel] fujitsu (avision) scanner not being found after some time

2012-11-20 Thread dabicho
El 20/11/2012 11:45, m. allan noah kitno455 at gmail.com escribi?: On Tue, Nov 20, 2012 at 12:40 PM, dabicho tsukebumi at gmail.com wrote: Sorry for the time it took me to answer. I had no access to the hardware until now. There is no information on dmesage other than device plug/unplug

[sane-devel] fujitsu (avision) scanner not being found after some time

2012-11-16 Thread dabicho
Hello. I am working on a system with a function to scan documents. When this option is selected, a new process is started to look, open and configure a scanner and scan the documents. However after some time, sane_find_scanner takes a long time to return and finds nothing. It is needed to turn on

[sane-devel] fujitsu (avision) scanner not being found after some time

2012-11-16 Thread m. allan noah
Some scanners go to sleep, and cannot wake up using SANE. This is because they shut down USB endpoint 0 to save power. This is in violation of the USB spec. This does not present a problem on windows, because the driver stays running, and so does not use endpoint 0 after the driver starts. We use

[sane-devel] fujitsu (avision) scanner not being found after some time

2012-11-16 Thread m. allan noah
Anything in the kernel logs at that time? allan On Fri, Nov 16, 2012 at 6:16 PM, dabicho tsukebumi at gmail.com wrote: On Fri, Nov 16, 2012 at 11:03 AM, m. allan noah kitno455 at gmail.com wrote: On Fri, Nov 16, 2012 at 11:56 AM, dabicho tsukebumi at gmail.com wrote: That does not help. I

[sane-devel] fujitsu (avision) scanner not being found after some time

2012-11-16 Thread Alejandro Imass
I had the same problem with HP scanners using the avision driver. In my case it was when the scanners went on power-saving mode then sane would not wake the scanner up again. The workaround was power cycling the scanner. On Fri, Nov 16, 2012 at 7:26 PM, m. allan noah kitno455 at gmail.com wrote: