MTK GPS Datalogger Device Control

Hello

Despite your changes your are surely still pointing to 32 bit libraries.

There is one link on http://bt747.free.fr/content/?q=webinstall that will
allow you trying the new RXTX2.2pre from the web. I need to check it, but
I think that the normal links also refer to the beta RXTX library already
for 64 bit systems.

However - more and more people are moving to 64 bit and despite the fact
that this RXRX2.2pre is still in beta, I guess that I'll need to add it to
the distribution.

Ok, I did some rtfm and found the line explaining how to adapt the
rxtx-libs for amd64.
Unfortunately it did not help much, but I now think it's not really a bug
but my misunderstanding how to configure the startup-files. I will close
the bug and post in the forum for help.

Experimental: JNI_OnLoad called.
RXTX Warning: Removing stale lock file. /var/lock/LCK..ttyUSB0
#
# An unexpected error has been detected by Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007f47a43cf462, pid=7872, tid=139945673783632
#
# Java VM: Java HotSpot(TM) 64-Bit Server VM (11.3-b02 mixed mode
linux-amd64)
# Problematic frame:
# C [librxtxSerial.so+0x6462] read_byte_array+0x52
#
# An error report file with more information is saved as:
# /home/mno/gps/BT747/hs_err_pid7872.log
#
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#

I forgot to attach the dmesg output:

[ 100.444560] usb 4-1: new full speed USB device using ohci_hcd and
address 2
[ 100.613224] usb 4-1: configuration #1 chosen from 1 choice
[ 100.831698] usbcore: registered new interface driver usbserial
[ 100.831729] USB Serial support registered for generic
[ 100.831780] usbcore: registered new interface driver usbserial_generic
[ 100.831784] usbserial: USB Serial Driver core
[ 100.870606] USB Serial support registered for cp2101
[ 100.870652] cp2101 4-1:1.0: cp2101 converter detected
[ 101.005558] usb 4-1: reset full speed USB device using ohci_hcd and
address 2
[ 101.170169] usb 4-1: cp2101 converter now attached to ttyUSB0
[ 101.170199] usbcore: registered new interface driver cp2101
[ 101.170204] cp2101: v0.07:Silicon Labs CP2101/CP2102 RS232 serial
adaptor driver