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by fgfanta
Mon Feb 10, 2020 5:37 pm
Forum: Troubleshooting
Topic: [SOLVED] Pi4 running Buster doesn't see WiFi network interface
Replies: 1
Views: 412

Re: Pi4 running Buster doesn't see WiFi network interface

I believe I have reproduced an issue similar to this https://www.raspberrypi.org/forums/viewtopic.php?t=262963 , as I modified the /boot/cmdline.txt to switch to an SSD connected via USB right after boot. Reinstalling either Raspbian or Raspbian for Robots on the micro SD only (with no switch over t...
by fgfanta
Tue Feb 04, 2020 2:06 pm
Forum: Troubleshooting
Topic: [SOLVED] Pi4 running Buster doesn't see WiFi network interface
Replies: 1
Views: 412

[SOLVED] Pi4 running Buster doesn't see WiFi network interface

I have a Pi4 model B (4GB RAM) which I understand comes with a built-in IEEE 802.11ac wireless adapter. However, it looks like Raspbian (Buster) doesn't see it. It sees the Ethernet and the loopback interfaces, but no WiFi interface. ~> netstat -i Kernel Interface table Iface MTU RX-OK RX-ERR RX-DRP...
by fgfanta
Mon Jan 13, 2020 10:00 pm
Forum: Ubuntu
Topic: What to install under Ubuntu to cross-compile for a Pi4 running Raspbian "buster"?
Replies: 2
Views: 1192

What to install under Ubuntu to cross-compile for a Pi4 running Raspbian "buster"?

I would like to build the source code on a PC running Ubuntu 18.04, to then deploy the executable to a Pi4 model B running Raspbian/Debian 10 "buster". What should I install on the Ubuntu PC in order to do this? I expect I must install gcc and c++ compilers for ARM and some libraries, but I don't kn...
by fgfanta
Thu Nov 24, 2016 11:10 am
Forum: Troubleshooting
Topic: NFS server only starts on second attempt
Replies: 2
Views: 481

Re: NFS server only starts on second attempt

Update: if I wait for a while after I booted, then the command to start the NFS server works right away. This is OK to make the NFS work, but no good to have it start automatically at boot time (unless I stick a sleep before it, not an ideal solution).
by fgfanta
Thu Nov 24, 2016 10:47 am
Forum: Troubleshooting
Topic: NFS server only starts on second attempt
Replies: 2
Views: 481

NFS server only starts on second attempt

I try to start the NFS server with sudo service nfs-kernel-server start or with sudo systemctl start nfs-kernel-server after a wait of a few minutes I get: Job for nfs-kernel-server.service failed. See 'systemctl status nfs-kernel-server.service' and 'journalctl -xn' for details. But when I try a se...
by fgfanta
Wed Nov 16, 2016 12:15 am
Forum: Beginners
Topic: How to start NFS server at boot time?
Replies: 1
Views: 535

How to start NFS server at boot time?

I have installed and configured NFSv4 on a Raspberry Pi 2 running Jessie, and it works fine as long as I start it manually with

Code: Select all

sudo service nfs-kernel-server start
How can I have the service started automatically at boot time, so I don't have to start it manually?
by fgfanta
Wed Nov 16, 2016 12:10 am
Forum: Beginners
Topic: How to revert to previous firmware
Replies: 4
Views: 8532

Re: How to revert to previous firmware

I have re-imaged the micro SD with the latest Raspbian and now the problem is resolved. Previously I had a very old image on the micro SD, hence the unexpected output of dpkg -l | grep raspberry.*kernel.

Thank you for your help!
by fgfanta
Mon Nov 14, 2016 9:37 pm
Forum: Beginners
Topic: How to revert to previous firmware
Replies: 4
Views: 8532

Re: How to revert to previous firmware

When I try with apt-get, I get:

Code: Select all

E: Unable to locate package raspiberrypi-kernel
I assumed a typo in the package name and also tried raspberrypi-kernel, with the same result.

Thanks.
by fgfanta
Sun Nov 13, 2016 8:40 pm
Forum: Beginners
Topic: How to revert to previous firmware
Replies: 4
Views: 8532

How to revert to previous firmware

After updating to the latest firmware of a Raspberry PI 2 B with sudo rpi-update I am getting some flickering on screen, icons on the desktop moving around, and an intermittent yellow bolt in the top right corner. I understand I can revert to some previous firmware with sudo rpi-update <hash> but wh...
by fgfanta
Sat Apr 09, 2016 5:23 am
Forum: Troubleshooting
Topic: mount.nfs: access denied by server
Replies: 1
Views: 2009

Re: mount.nfs: access denied by server

In case somebody is interested, I got the solution from somebody on StackExchange. In short, the line in /etc/exports should read /home/pi/workspace 192.168.1.0/24(rw,no_subtree_check,sync,root_squash) See http://unix.stackexchange.com/questions/275093/how-to-resolve-mount-nfs-access-denied-by-serve...
by fgfanta
Thu Apr 07, 2016 3:14 pm
Forum: Troubleshooting
Topic: mount.nfs: access denied by server
Replies: 1
Views: 2009

mount.nfs: access denied by server

I am trying to export the /home/pi directory of a Raspberry Pi 2 to my PC running Ubuntu via NFS. When I try to mount the directory on the PC I get: mount.nfs: access denied by server while mounting 192.168.1.135:/home/pi Any idea what could be wrong? Here what I have done. On the Raspberry Pi 2 Add...

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