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Re: Segfault after upgrade.

From: David J Taylor
Subject: Re: Segfault after upgrade.
Date: Fri, 22 May 2020 19:39:34 +0100

Yo David!

On Fri, 22 May 2020 16:22:19 +0100
"David J Taylor" <address@hidden> wrote:

Thanks, Kai.  Yes, a left-over was my thought too, but how to find

Just use the same tool you used to install the old Buster gpsd to
uninstall it.

To debug segfault:

1. be sure gpsd is not being managed by systemd

2. As root:

killall gpsd

3. ass root

killall gpsd

4. as root, to ensure nothing grabbing the port::

netstat -apn | fgrep 2947

5. run gpsd with logs:

gpsd -nGD 6 /dev/ttyXX

6. screen past 30 seconds and post here.


Thanks, Gary.  Here's the story:

0. I removed the old version and rebooted. The only two "gpsd" files remaining were:


Having added buster-backports I then ran:

 sudo apt-get install -t buster-backports gpsd gpsd-clients python-gps

This gave an error about python:

Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
gpsd-clients : Breaks: python-gps but 3.17-7 is to be installed
E: Unable to correct problems, you have held broken packages.

so I ran the install again without the python-gps. I hope that was OK. I left the /etc/defaults/gpsd unchanged. The "obsolete" /etc/init.d/gpsd was removed by the install.

1. I don't know how to do this. I did try sudo service gpsd stop, which seemed to work, and ps -e | grep gps showed no process.

2. No process found.

3. No process found.

4.  netstat -apn | fgrep 2947
tcp 0 0* LISTEN 1/init tcp6 0 0 ::1:2947 :::* LISTEN 1/init

5. pi@RasPi-3:~ $ sudo gpsd -nGD 6 /dev/ttyAMA0
Segmentation fault

6. I don't understand.  dmesg | grep gps  shows no messages.

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