That's right, I don't have a serial console.
If the USB hub is really reset, then this might be an explanation. As
'lsusb' suggests, the QNAP internally only seems to have one USB hub:
root@NAS:~# lsusb
Bus 001 Device 003: ID 0781:5571 SanDisk Corp.
Bus 001 Device 002: ID 05e3:0608 Genesys Logic, Inc. USB-2.0 4-Port HUB
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
The device has 4 ports, of which 3 are on the back and one is on the
front. The "SanDisk Corp." is my USB flash drive with the OS installed
on it, connected to one of the backside ports. The other ports were not
occupied when I issued the above command.
Sowhat would be the most sensible thing to try? Connecting the printer
to the front port instead of one of the back ports?
When doing this I will also try to use another cable as I'm currently
using an extensioncable (2 meters I think).
But one thing to add: I have been using this very printer, this very NAS
and this very set of cables for approx. one year every day using the
original QNAP firmware. And I never had a crash or problems printing
using the NASand CUPS.
-------- Original-Nachricht --------
Betreff: RE: System crashes on USB connection
Datum: Mon, 26 Nov 2012 15:00:44 -0000
Von: Paul Kench <[email protected]>
An: 'Christoph Zep' <[email protected]>,
<[email protected]>
On my Kirkwood NAS (Netgear Stora) running Wheezy, I have a hub connected, I
find that plugging devices into the hub in the 'wrong' port resets it. This
doesn't affect my '/' as it's on the SATA disk. Do you know if the ports on
your QNAP are a hub internally?
I find the USB resets are port order dependent, if you can try swapping the
root fs and the printer, it might work.
I take it you don't have a serial console?
Regards
Paul
-----Original Message-----
From: Christoph Zep [mailto:[email protected]]
Sent: 25 November 2012 23:54
To: [email protected]
Subject: System crashes on USB connection
Hi everyone,
I installed Debian on a USB flash drive on my QNAP TS-419p+(Kirkwood)
inserted into the lowest backside USB port.Everything's been working
very smoothly until I tried to connect my printer to the NAS (also via
USB). Via SSH the NAS reacted with the same error to every command as
soon as the printer was connected:
-bash: /bin/dmesg: Input/output error
Upon manual power off (button on the NAS) and reboot, the system took a
very long time to come up and finally booted. Since then, the system
boots quickly againbut I don't know how to get my printer working.
Thanks for any suggestions,
Christoph
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