<html><body><div style="color:#000; background-color:#fff; font-family:tahoma, new york, times, serif;font-size:10pt"><div><span>I've made a little progress. My suspicion is that some low-level bit of SW is getting wedged. <br></span></div><div style="color: rgb(0, 0, 0); font-size: 13.3333px; font-family: tahoma,new york,times,serif; background-color: transparent; font-style: normal;"><span><br></span></div><div style="color: rgb(0, 0, 0); font-size: 13.3333px; font-family: tahoma,new york,times,serif; background-color: transparent; font-style: normal;"><span>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. <br></span></div><div style="color: rgb(0, 0, 0); font-size: 13.3333px; font-family: tahoma,new york,times,serif; background-color: transparent; font-style: normal;"><br><span></span></div><div style="color: rgb(0, 0, 0); font-size: 13.3333px; font-family: tahoma,new york,times,serif; background-color: transparent; font-style: normal;"><span>I can reproduce the problem rather often by unplugging and plugging the GPS after the PC is up. <br></span></div><div style="color: rgb(0, 0, 0); font-size: 13.3333px; font-family: tahoma,new york,times,serif; background-color: transparent; font-style: normal;"><span><br></span></div><div>The following is from /var/log/syslog:</div><div><br></div><div style="color: rgb(0, 0, 0); font-size: 13.3333px; font-family: tahoma,new york,times,serif; background-color: transparent; font-style: normal;">#unplug GPS<br></div><div style="color: rgb(0, 0, 0); font-size: 13.3333px; font-family: tahoma,new
york,times,serif; background-color: transparent; font-style: normal;">Sep 11 23:57:40 pz01 kernel: [ 1748.849152] usb 4-4: USB disconnect, device number 3<br>Sep 11 23:57:40 pz01 kernel: [ 1748.849849] pl2303 ttyUSB0: pl2303 converter now disconnected from ttyUSB0<br>Sep 11 23:57:40 pz01 kernel: [ 1748.849867] pl2303 4-4:1.0: device disconnected<br>Sep 11 23:57:40 pz01 gpsd.hotplug: remove /dev/ttyUSB0<br>Sep 11 23:57:40 pz01 gpsdctl: gpsd_control(action=remove, arg=/dev/ttyUSB0)<br>Sep 11 23:57:40 pz01 gpsdctl: reached a running gpsd<br>Sep 11 23:57:52 pz01 kernel: [ 1761.656117] usb 4-4: new full-speed USB device number 4 using ohci_hcd<br>Sep 11 23:57:53 pz01 kernel: [ 1761.868637] usb 4-4: New USB device found, idVendor=067b, idProduct=2303<br>Sep 11 23:57:53 pz01 kernel: [ 1761.868645] usb 4-4: New USB device strings: Mfr=1, Product=2, SerialNumber=0<br>Sep 11 23:57:53 pz01 kernel: [ 1761.868651] usb 4-4: Product: USB-Serial Controller D<br>Sep 11
23:57:53 pz01 kernel: [ 1761.868656] usb 4-4: Manufacturer: Prolific Technology Inc. <br>Sep 11 23:57:53 pz01 kernel: [ 1761.871630] pl2303 4-4:1.0: pl2303 converter detected<br>Sep 11 23:57:53 pz01 kernel: [ 1761.904576] usb 4-4: pl2303 converter now attached to ttyUSB1<br>Sep 11 23:57:53 pz01 mtp-probe: checking bus 4, device 4: "/sys/devices/pci0000:00/0000:00:04.0/usb4/4-4"<br>Sep 11 23:57:53 pz01 mtp-probe: bus: 4, device: 4 was not an MTP device<br>Sep 11 23:57:53 pz01 gpsd.hotplug: add /dev/ttyUSB1<br>Sep 11 23:57:53 pz01 gpsdctl: gpsd_control(action=add, arg=/dev/ttyUSB1)<br>Sep 11 23:57:53 pz01 gpsdctl: reached a running gpsd</div><div style="color: rgb(0, 0, 0); font-size: 13.3333px; font-family: tahoma,new york,times,serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 13.3333px; font-family: tahoma,new york,times,serif; background-color: transparent; font-style: normal;"># plug in
GPS This time the gpspipe isn't presenting data.<br>Sep 11 23:58:01 pz01 gpsd[2726]: gpsd:ERROR: device open failed: No such file or directory - retrying read-only<br>Sep 11 23:58:01 pz01 gpsd[2726]: gpsd:ERROR: read-only device open failed: No such file or directory<br>Sep 11 23:58:01 pz01 gpsd[2726]: gpsd:ERROR: /dev/gps0: device activation failed.<br>Sep 11 23:58:01 pz01 gpsd[2726]: gpsd:SHOUT: vendor/product match with 091e:0003 not found<br>Sep 11 23:58:03 pz01 gpsd[2726]: gpsd:ERROR: device open failed: No such file or directory - retrying read-only<br>Sep 11 23:58:03 pz01 gpsd[2726]: gpsd:ERROR: read-only device open failed: No such file or directory<br>Sep 11 23:58:03 pz01 gpsd[2726]: gpsd:ERROR: /dev/gps0: device activation failed.<br><br>#unplug gps<br>Sep 12 00:06:12 pz01 kernel: [ 2261.548704] usb 4-4: USB disconnect, device number 4<br><br><br></div><div style="color: rgb(0, 0, 0); font-size: 13.3333px; font-family: tahoma,new
york,times,serif; background-color: transparent; font-style: normal;"><br></div> <div style="font-family: tahoma, new york, times, serif; font-size: 10pt;"> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div dir="ltr"> <hr size="1"> <font face="Arial" size="2"> <b><span style="font-weight:bold;">From:</span></b> Paul Zander <paulz@ieee.org><br> <b><span style="font-weight: bold;">To:</span></b> "conspire@linuxmafia.com" <conspire@linuxmafia.com> <br> <b><span style="font-weight: bold;">Sent:</span></b> Monday, September 9, 2013 11:18 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> [conspire] USB GPS<br> </font> </div> <div class="y_msg_container"><br><br><br>I recently got a USB-GPS receiver which is not working as well as I had hoped.<br>Model BU-353. Sold by assorted dealers on e-Bay and Amazon. Certainly is the most widely sold.<br><br>>apt-get install gpsd
gpsd-clients FoxtrotGPS QLandkarte <br><br>>ls /dev <br> # showed gps device: /dev/gps0<br><br>>dpkq-reconfigure gpsd<br> # Used defaults for all settings, except to enter device: /dev/gps0<br><br>>gpspipe -r <br> # returned 0's for several minutes then after getting a fix, it returned data.<br><br>FoxtrotGPS <br> # opened and put a big circle on my street on the map. So far everything went well. <br><br><br>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:<br><br>When the GPS status LED is on steady, it indicates no fix, it is reasonable that the mapping SW has nothing to work with.<br><br>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. <br><br>_______________________________________________<br>conspire mailing list<br><a ymailto="mailto:conspire@linuxmafia.com" href="mailto:conspire@linuxmafia.com">conspire@linuxmafia.com</a><br><a href="http://linuxmafia.com/mailman/listinfo/conspire" target="_blank">http://linuxmafia.com/mailman/listinfo/conspire</a><br><br><br></div> </div> </div> </div></body></html>