[conspire] USB GPS

[Tony Godshall]

Is it plugged into one of those "powered up when computer off" USB
ports like the yellow ones on the lenovos?

On Thu, Sep 12, 2013 at 12:09 AM, Paul Zander <paulz at ieee.org> wrote:
> I've made a little progress.   My suspicion is that some low-level bit of SW
> is getting wedged.
>
> If the GPS is plugged in, and the computer is powering USB, even when the
> computer is "off", the GPS will try to get a fix.  When the PC is booted up,
> all is well.  But using GPS on a PC connected to AC power is not too useful.
> My intent is to use it with a lap top that can run off of batteries.  So
> there is "some" interaction with the GPS powering on the PC recognizing it.
>
> I can reproduce the problem rather often by unplugging and plugging the GPS
> after the PC is up.
>
> The following is from /var/log/syslog:
>
> #unplug GPS
> Sep 11 23:57:40 pz01 kernel: [ 1748.849152] usb 4-4: USB disconnect, device
> number 3
> Sep 11 23:57:40 pz01 kernel: [ 1748.849849] pl2303 ttyUSB0: pl2303 converter
> now disconnected from ttyUSB0
> Sep 11 23:57:40 pz01 kernel: [ 1748.849867] pl2303 4-4:1.0: device
> disconnected
> Sep 11 23:57:40 pz01 gpsd.hotplug: remove /dev/ttyUSB0
> Sep 11 23:57:40 pz01 gpsdctl: gpsd_control(action=remove, arg=/dev/ttyUSB0)
> Sep 11 23:57:40 pz01 gpsdctl: reached a running gpsd
> Sep 11 23:57:52 pz01 kernel: [ 1761.656117] usb 4-4: new full-speed USB
> device number 4 using ohci_hcd
> Sep 11 23:57:53 pz01 kernel: [ 1761.868637] usb 4-4: New USB device found,
> idVendor=067b, idProduct=2303
> Sep 11 23:57:53 pz01 kernel: [ 1761.868645] usb 4-4: New USB device strings:
> Mfr=1, Product=2, SerialNumber=0
> Sep 11 23:57:53 pz01 kernel: [ 1761.868651] usb 4-4: Product: USB-Serial
> Controller D
> Sep 11 23:57:53 pz01 kernel: [ 1761.868656] usb 4-4: Manufacturer: Prolific
> Technology Inc.
> Sep 11 23:57:53 pz01 kernel: [ 1761.871630] pl2303 4-4:1.0: pl2303 converter
> detected
> Sep 11 23:57:53 pz01 kernel: [ 1761.904576] usb 4-4: pl2303 converter now
> attached to ttyUSB1
> Sep 11 23:57:53 pz01 mtp-probe: checking bus 4, device 4:
> "/sys/devices/pci0000:00/0000:00:04.0/usb4/4-4"
> Sep 11 23:57:53 pz01 mtp-probe: bus: 4, device: 4 was not an MTP device
> Sep 11 23:57:53 pz01 gpsd.hotplug: add /dev/ttyUSB1
> Sep 11 23:57:53 pz01 gpsdctl: gpsd_control(action=add, arg=/dev/ttyUSB1)
> Sep 11 23:57:53 pz01 gpsdctl: reached a running gpsd
>
> # plug in GPS  This time the gpspipe isn't presenting data.
> Sep 11 23:58:01 pz01 gpsd[2726]: gpsd:ERROR: device open failed: No such
> file or directory - retrying read-only
> Sep 11 23:58:01 pz01 gpsd[2726]: gpsd:ERROR: read-only device open failed:
> No such file or directory
> Sep 11 23:58:01 pz01 gpsd[2726]: gpsd:ERROR: /dev/gps0: device activation
> failed.
> Sep 11 23:58:01 pz01 gpsd[2726]: gpsd:SHOUT: vendor/product match with
> 091e:0003 not found
> Sep 11 23:58:03 pz01 gpsd[2726]: gpsd:ERROR: device open failed: No such
> file or directory - retrying read-only
> Sep 11 23:58:03 pz01 gpsd[2726]: gpsd:ERROR: read-only device open failed:
> No such file or directory
> Sep 11 23:58:03 pz01 gpsd[2726]: gpsd:ERROR: /dev/gps0: device activation
> failed.
>
> #unplug gps
> Sep 12 00:06:12 pz01 kernel: [ 2261.548704] usb 4-4: USB disconnect, device
> number 4
>
>
>
> ________________________________
> From: Paul Zander <paulz at ieee.org>
> To: "conspire at linuxmafia.com" <conspire at linuxmafia.com>
> Sent: Monday, September 9, 2013 11:18 PM
> Subject: [conspire] USB GPS
>
>
>
> I recently got a USB-GPS receiver which is not working as well as I had
> hoped.
> Model BU-353.  Sold by assorted dealers on e-Bay and Amazon.  Certainly is
> the most widely sold.
>
>>apt-get install gpsd  gpsd-clients FoxtrotGPS QLandkarte
>
>>ls /dev
>  # showed gps device:  /dev/gps0
>
>>dpkq-reconfigure gpsd
>  # Used defaults for all settings, except to enter device: /dev/gps0
>
>>gpspipe -r
>  #  returned 0's for several minutes then after getting a fix, it returned
> data.
>
> FoxtrotGPS
>  # opened and put a big circle on my street on the map. So far everything
> went well.
>
>
> After several days of using foxtrotGPS and Qlandkarte, I found that the GPS
> is inconsistent. The first symptom is the mapping SW is not responding.
> There are several possible scenarios:
>
> When the GPS status LED is on steady, it indicates no fix, it is reasonable
> that the mapping SW has nothing to work with.
>
> The condition I can't understand is when gpspipe is not returning anything,
> not even data of 0.  Frequently this the beginning of further problems. The
> computer might stop responding to mouse clicks.  Try to re-boot and the PC
> hangs during the shutdown.  The only work-around is to use the power supply
> switch.
>
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>
>
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Best Regards.
This is unedited.