Nut upsdev - Jun 2009 - nut: megatec_usb shows error "ser_send_pace: Device detached" on periodically checks

Hi Alexey,

Please post the output of 'lsusb' and
'megatec_usb -a sven_625 -u nut -DDDDD'.

On Monday 15 June 2009 14:32:16 you wrote:
> Package: nut
> Version: 2.4.1-3
> Severity: normal
>
> I have a SVEN Pro+ 625 ups that uses megatec_usb driver.
> In ups.conf I describe it like:
> [sven_625]
>     driver = megatec_usb
>     port = auto
>     desc = "SVEN Pro+ 625"
>
> When I starting the nut, I hear "beep" from the ups and nut
succesfully
> detect it. And I can view the UPS status:
> # upsc sven_625
> battery.charge: 97.5
> battery.voltage: 13.60
> battery.voltage.nominal: 12.0
> driver.name: megatec_usb
> driver.parameter.pollinterval: 2
> driver.parameter.port: auto
> driver.version: 2.4.1
> driver.version.internal: 1.6
> input.frequency: 50.0
> input.frequency.nominal: 50.0
> input.voltage: 233.3
> input.voltage.fault: 140.0
> input.voltage.maximum: 233.3
> input.voltage.minimum: 229.9
> input.voltage.nominal: 220.0
> output.voltage: 233.8
> ups.beeper.status: enabled
> ups.delay.shutdown: 0
> ups.delay.start: 2
> ups.load: 20.0
> ups.mfr:
> ups.model:  VT0105BG
> ups.serial: unknown
> ups.status: OL
> ups.temperature: 30.0
> ups.type: standby
>
>
>
> But in /var/log/syslog I see the errors that adds every 5-20 seconds!
> Jun 15 13:58:12 beam megatec_usb[15480]: ser_send_pace: Device detached?
> (error -5: could not claim interface 0: Device or resource busy)
> Jun 15 13:58:13 beam megatec_usb[15480]: Successfully reconnected
> Jun 15 13:58:32 beam megatec_usb[15480]: ser_send_pace: Device detached?
> (error -5: could not claim interface 0: Device or resource busy)
> Jun 15 13:58:32 beam megatec_usb[15480]: Successfully reconnected
> Jun 15 13:58:34 beam megatec_usb[15480]: ser_send_pace: Device detached?
> (error -5: error sending control message: Operation not permitted)
> Jun 15 13:58:35 beam megatec_usb[15480]: Successfully reconnected
>
>
>
> If I try to start megatec_usb manually, I see:
> # /lib/nut/megatec_usb -a sven_625 -D -u nut
> Network UPS Tools - Megatec protocol driver 1.6 (2.4.1)
> Serial-over-USB transport layer 0.10
> debug level is '1'
> Starting UPS detection process...
> 0 out of 5 detection attempts failed (minimum failures: 2).
> Cancelling any pending shutdown or battery test.
> Megatec protocol UPS detected [  VT0105BG].
> 12.0V battery, interval [9.7V, 13.7V].
> Done setting up the UPS.
> ser_send_pace: Device detached? (error -5: error sending control message:
> Operation not permitted) Successfully reconnected
> ser_send_pace: Device detached? (error -5: error sending control message:
> Operation not permitted) Successfully reconnected
> ser_send_pace: Device detached? (error -5: error sending control message:
> Operation not permitted) Successfully reconnected
>
>
>
> If I try to start it with root priveleges, I see thouse errors:
> # /lib/nut/megatec_usb -a sven_625 -D -u root
> Network UPS Tools - Megatec protocol driver 1.6 (2.4.1)
> Serial-over-USB transport layer 0.10
> debug level is '1'
> Starting UPS detection process...
> 0 out of 5 detection attempts failed (minimum failures: 2).
> Cancelling any pending shutdown or battery test.
> Megatec protocol UPS detected [  VT0105BG].
> 12.0V battery, interval [9.7V, 13.7V].
> Done setting up the UPS.
> ser_send_pace: Device detached? (error -5: No error)
> Successfully reconnected
> ser_send_pace: Device detached? (error -5: No error)
> Successfully reconnected
> ser_send_pace: Device detached? (error -5: No error)
> Successfully reconnected
> ser_send_pace: Device detached? (error -5: No error)
> Successfully reconnected
>
>
> What does this error mean and how I can disable thouse messages?
>
>
> -- System Information:
> Debian Release: squeeze/sid
>   APT prefers testing
>   APT policy: (500, 'testing')
> Architecture: amd64 (x86_64)
>
> Kernel: Linux 2.6.26-2-amd64 (SMP w/2 CPU cores)
> Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
> Shell: /bin/sh linked to /bin/bash
>
> Versions of packages nut depends on:
> ii  adduser                      3.110       add and remove users and
> groups ii  debconf                      1.5.26      Debian configuration
> management sy ii  libc6                        2.9-12      GNU C Library:
> Shared libraries ii  libupsclient1                2.4.1-3     network UPS
> tools - client library ii  libusb-0.1-4                 2:0.1.12-13
> userspace USB programming library ii  libwrap0                     7.6.q-16
>    Wietse Venema's TCP wrappers libra ii  lsb-base                    
> 3.2-22      Linux Standard Base 3.2 init scrip ii  udev                    
>     0.141-1     /dev/ and hotplug management daemo
>
> Versions of packages nut recommends:
> ii  bash-completion               1:1.0-3    programmable completion for
> the ba
>
> Versions of packages nut suggests:
> pn  nut-cgi                       <none>     (no description
available)
> pn  nut-dev                       <none>     (no description
available)
> pn  nut-snmp                      <none>     (no description
available)
> pn  nut-xml                       <none>     (no description
available)
>
> -- debconf information:
>   nut/major_upstream_changes:

-- 
  Alexander

Citeren Alexander Gordeev <lasaine op lvk.cs.msu.su>:
>> If I try to start it with root priveleges, I see thouse errors:
>> # /lib/nut/megatec_usb -a sven_625 -D -u root
>> Network UPS Tools - Megatec protocol driver 1.6 (2.4.1)
>> Serial-over-USB transport layer 0.10
>> debug level is '1'
>> Starting UPS detection process...
>> 0 out of 5 detection attempts failed (minimum failures: 2).
>> Cancelling any pending shutdown or battery test.
>> Megatec protocol UPS detected [  VT0105BG].
>> 12.0V battery, interval [9.7V, 13.7V].
>> Done setting up the UPS.
>> ser_send_pace: Device detached? (error -5: No error)
>> Successfully reconnected
>> ser_send_pace: Device detached? (error -5: No error)
>> Successfully reconnected
>> ser_send_pace: Device detached? (error -5: No error)
>> Successfully reconnected
>> ser_send_pace: Device detached? (error -5: No error)
>> Successfully reconnected
The error handler usb_comm_fail() in megatec_usb() is over reacting  
here. The libusb library is clearly stating that there is no error  
here, so reconnecting is probably not the best thing to do.

Best regards, Arjen
-- 
Please keep list traffic on the list

Hi Alexander and Alexey,

2009/6/18 Alexander Gordeev:
> Hi Alexey,
>
> Please post the output of 'lsusb' and
> 'megatec_usb -a sven_625 -u nut -DDDDD'.
any news on this bug?

Alexey: have you tried the blazer_usb driver?
I would be interested in the output, though I doubt the results will
be different.

Alexander: can you please produce a patch for megatec_usb (and
preferably for blazer_usb) to ignore error -5 for testing?

cheers,
Arnaud