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Strange Epson Perfection V300 Photo (USB) problem
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amair
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Joined: 12 Aug 2003
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PostPosted: Sat May 31, 2014 9:44 am    Post subject: Strange Epson Perfection V300 Photo (USB) problem Reply with quote

Hi,

I've been using the named scanner for years without any problem on my old PC (32bit Gentoo). After buying a new PC and installing 64bit Gentoo I can't use the scanner "the easy way":

1) I power on the scanner and it's detected:
Code:
[ 1793.682574] usb 3-4: new high-speed USB device number 6 using xhci_hcd
[ 1793.696230] usb 3-4: New USB device found, idVendor=04b8, idProduct=0131
[ 1793.696231] usb 3-4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 1793.696232] usb 3-4: Product: EPSON Scanner
[ 1793.696233] usb 3-4: Manufacturer: EPSON
[ 1793.696313] usb 3-4: ep 0x81 - rounding interval to 128 microframes, ep desc says 255 microframes
[ 1793.696314] usb 3-4: ep 0x2 - rounding interval to 128 microframes, ep desc says 255 microframes

2) I run xsane. It initializes the scanner (sled is moving) and then some seconds nothing happens.
3) Instead of the xsane window an error message pops up:
Code:
Failed to open device 'epkowa:interpreter:003:006': Error during device I/O.

4) If I now run xsane again its window pops up most of the time, but sometimes I have to power off the scanner and start at (1) again, until it works.

I've been trying different gentoo-sources, now I'm at 3.12.13, but it didn't change anything. It's also not limited to xsane, it's the same with scanimage and other tools.

Any idea what's wrong here?

Best regards,
Andreas
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gerard82
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Joined: 04 Jan 2004
Posts: 2253
Location: Netherlands

PostPosted: Sat May 31, 2014 10:36 am    Post subject: Reply with quote

I've had problems with an Epson combi much like yours.
With the scanner turned off:
Code:

modprobe -r xhci_hcd

Then turn on the scanner.
USB3 didn't exist at the time this scanner was made.
Hope this helps.
Gerard.
_________________
To install Gentoo I use sysrescuecd.Based on Gentoo,has firefox to browse Gentoo docs and mc to browse (and edit) files.
The same disk can be used for 32 and 64 bit installs.
You can follow the Handbook verbatim.
http://www.sysresccd.org/Download
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amair
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Joined: 12 Aug 2003
Posts: 43

PostPosted: Sat May 31, 2014 12:53 pm    Post subject: Reply with quote

Hi Gerard,
gerard82 wrote:
I've had problems with an Epson combi much like yours.
With the scanner turned off:
Code:

modprobe -r xhci_hcd

Then turn on the scanner.

thanks for your answer.
First problem: I didn't have that module, so I built a new kernel to have that module (instead of in-kernel).
Second problem: After booting the new kernel I disabled that module and then I had no more keyboard. So typing was impossible.
I guess I can't run with xhci_hcd.

gerard82 wrote:
USB3 didn't exist at the time this scanner was made.
Hope this helps.
Gerard.

I think this shouldn't matter. Am I wrong?

Any other ideas?

Best regards,
Andreas
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gerard82
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Posts: 2253
Location: Netherlands

PostPosted: Sat May 31, 2014 1:07 pm    Post subject: Reply with quote

What about ohci and ehci (USB1 and USB2)?
Surely your computer has those.
Gerard.
_________________
To install Gentoo I use sysrescuecd.Based on Gentoo,has firefox to browse Gentoo docs and mc to browse (and edit) files.
The same disk can be used for 32 and 64 bit installs.
You can follow the Handbook verbatim.
http://www.sysresccd.org/Download
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amair
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Joined: 12 Aug 2003
Posts: 43

PostPosted: Sun Jun 01, 2014 7:44 am    Post subject: Reply with quote

Hi Gerald,
gerard82 wrote:
What about ohci and ehci (USB1 and USB2)?
Surely your computer has those.
Gerard.

Both are enabled in the kernel so I guess they should be used, but I'm not sure if the external USB connectors are handled by them.

Best regards,
Andreas
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