Video of Evan's talk from the last meeting
Hello everyone, The recording of the talk -- I've ditched my Linux desktops for Windows .... sorta with Evan Leibovitch Is available here -- https://youtu.be/HfranDwTZOU Alex.
I have a desktop computer that dual boots into Ubuntu Studio and Windows 10. It is connected to the internet using a cat-5 cable to my router. After the last update and rebooting, it turns out that I no longer have ethernet on Linux. This is not true on Windows, as I am writing you this email from the same computer. I strongly suspect that there is an update issue that is disabling ethernet on Linux. Right now, my computer is in splendid isolation from the rest of the world. I can't even see computer resources from other computers in my apartment. I also can't see the router itself through my browser. Any ideas as to what to do next to diagnose the problem? Paul
On 2021-04-18 12:20 p.m., sciguy via talk wrote:
I have a desktop computer that dual boots into Ubuntu Studio and Windows 10. It is connected to the internet using a cat-5 cable to my router.
After the last update and rebooting, it turns out that I no longer have ethernet on Linux. This is not true on Windows, as I am writing you this email from the same computer.
I strongly suspect that there is an update issue that is disabling ethernet on Linux. Right now, my computer is in splendid isolation from the rest of the world. I can't even see computer resources from other computers in my apartment. I also can't see the router itself through my browser.
Any ideas as to what to do next to diagnose the problem?
I'd start with the network manger GUI, see if you can see anything obvious there, and if not, start debugging from the command-line. In a previous life, I found the instructions for disabling network manager contained a lot of useful information. If you take that route, use script(1) and a notepad to carefully record your steps, as a lot of networking stuff is sensitive to the order you do things in, and you want to make a good map of where you went, for the time when you want to undo the changes you made. Oh, and make a backup of your home directory if you haven't already --dave -- David Collier-Brown, | Always do right. This will gratify System Programmer and Author | some people and astonish the rest davecb@spamcop.net | -- Mark Twain
Thanks a lot, Dave! Paul On 2021-04-18 12:47, David Collier-Brown via talk wrote:
On 2021-04-18 12:20 p.m., sciguy via talk wrote:
I have a desktop computer that dual boots into Ubuntu Studio and Windows 10. It is connected to the internet using a cat-5 cable to my router.
After the last update and rebooting, it turns out that I no longer have ethernet on Linux. This is not true on Windows, as I am writing you this email from the same computer.
I strongly suspect that there is an update issue that is disabling ethernet on Linux. Right now, my computer is in splendid isolation from the rest of the world. I can't even see computer resources from other computers in my apartment. I also can't see the router itself through my browser.
Any ideas as to what to do next to diagnose the problem?
I'd start with the network manger GUI, see if you can see anything obvious there, and if not, start debugging from the command-line.
In a previous life, I found the instructions for disabling network manager contained a lot of useful information.
If you take that route, use script(1) and a notepad to carefully record your steps, as a lot of networking stuff is sensitive to the order you do things in, and you want to make a good map of where you went, for the time when you want to undo the changes you made.
Oh, and make a backup of your home directory if you haven't already
--dave
To recap, I have had problems with connecting my computer to the immediate network (let alone the internet). It is dual-boot, and Windows 10 connects perfectly. Same hardware. I have recently had time to examine /var/log/syslog, and I have made a pastebin of just the messages from NetworkManager. https://pastebin.com/CbfnANpU Here are some key lines that got my attention: Apr 30 09:32:43 rivendell NetworkManager[2015]: <info> [1619789563.0888] device (lo): carrier: link connected Apr 30 09:32:43 rivendell NetworkManager[2015]: <info> [1619789563.0890] manager: (lo): new Generic device (/org/freedesktop/NetworkManager/Devices/1) Apr 30 09:32:43 rivendell NetworkManager[2015]: <info> [1619789563.0896] manager: (eno1): new Ethernet device (/org/freedesktop/NetworkManager/Devices/2) Apr 30 09:32:43 rivendell NetworkManager[2015]: <info> [1619789563.5762] settings: (eno1): created default wired connection 'Wired connection 1' Apr 30 09:32:43 rivendell NetworkManager[2015]: <info> [1619789563.6633] device (eno1): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external') Apr 30 09:32:43 rivendell NetworkManager[2015]: <warn> [1619789563.9481] Error: failed to open /run/network/ifstate It then tries again several times. If I interpret this correctly, tt seems to make a connecion, then by the fifth message there is a "state change" to "unmanaged". Any ideas as to what would cause this? Paul On 2021-04-18 16:57, sciguy wrote:
Thanks a lot, Dave!
Paul
On 2021-04-18 12:47, David Collier-Brown via talk wrote:
On 2021-04-18 12:20 p.m., sciguy via talk wrote:
I have a desktop computer that dual boots into Ubuntu Studio and Windows 10. It is connected to the internet using a cat-5 cable to my router.
After the last update and rebooting, it turns out that I no longer have ethernet on Linux. This is not true on Windows, as I am writing you this email from the same computer.
I strongly suspect that there is an update issue that is disabling ethernet on Linux. Right now, my computer is in splendid isolation from the rest of the world. I can't even see computer resources from other computers in my apartment. I also can't see the router itself through my browser.
Any ideas as to what to do next to diagnose the problem?
I'd start with the network manger GUI, see if you can see anything obvious there, and if not, start debugging from the command-line.
In a previous life, I found the instructions for disabling network manager contained a lot of useful information.
If you take that route, use script(1) and a notepad to carefully record your steps, as a lot of networking stuff is sensitive to the order you do things in, and you want to make a good map of where you went, for the time when you want to undo the changes you made.
Oh, and make a backup of your home directory if you haven't already
--dave
| From: sciguy via talk <talk@gtalug.org> | To: GTALUG Talk <talk@gtalug.org> Posting one message to two mailing lists is called "crossposting" and it often leads to mixups. For example, I have no idea what has been said in response to your original post on the ubuntu mailing list. I'm hampered by not using Ubuntu, but I'll try to be helpful. You didn't give the info that Arun asked for. It might be useful. Apr 30 09:32:42 rivendell NetworkManager[2015]: <info> [1619789562.1306] ifupdown: management mode: unmanaged Apr 30 09:32:42 rivendell NetworkManager[2015]: <warn> [1619789562.3309] ifupdown: interfaces file /etc/network/interfaces doesn't exist I don't know if these matter or just indicate you are not using legacy network configuration: | Here are some key lines that got my attention: | | Apr 30 09:32:43 rivendell NetworkManager[2015]: <info> [1619789563.0888] device (lo): carrier: link connected | Apr 30 09:32:43 rivendell NetworkManager[2015]: <info> [1619789563.0890] manager: (lo): new Generic device (/org/freedesktop/NetworkManager/Devices/1) (lo) is the loopback device. It has no actual hardware. It's just a way of talking to your own machine over. You should be able to ping 127.0.0.1 Looking at your log, most relevant lines refer to devince eno1. | Apr 30 09:32:43 rivendell NetworkManager[2015]: <info> [1619789563.0896] manager: (eno1): new Ethernet device (/org/freedesktop/NetworkManager/Devices/2) | Apr 30 09:32:43 rivendell NetworkManager[2015]: <info> [1619789563.5762] settings: (eno1): created default wired connection 'Wired connection 1' | Apr 30 09:32:43 rivendell NetworkManager[2015]: <info> [1619789563.6633] device (eno1): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external') | Apr 30 09:32:43 rivendell NetworkManager[2015]: <warn> [1619789563.9481] Error: failed to open /run/network/ifstate This last line might or might not be important. On my Fedora 33 system I don't have a /run/network directory. | It then tries again several times. If I interpret this correctly, tt seems to | make a connecion, then by the fifth message there is a "state change" to | "unmanaged". Any ideas as to what would cause this?
From then on, things flap around in failing ways.
More of syslog (beyond network manager) might be informative.
First, I'm not a Linux guru; most of my experience has been with SunOS and FreeBSD. Is there any evidence the card is recognized and is connecting? Are there errors in "/var/log/syslog"? I assume that you've looked at the network settings being used and tried reconfiguring the interface. This sounds to me like a system configuration issue or an Ubuntu problem, not a Studio problem, to me. I would definitely do a Google search using the Ubuntu Studio version asking if an update had caused network problems. I found some possibly related answers, but I don't know if any of them fit your problem. These were all from "askubuntu.com". If that doesn't work you'll need to ask for more detailed help, probably on "askubuntu.com". I think that you'll need to provide the Ubuntu Studio version and possibly Linux kernel version, the hardware you're using including the Ethernet hardware. I ran "lspci" and it shows I'm using an Intel 82574L GigE network interface. I ran into similar problems using FreeBSD with a RealTek Ethernet interface and it turned out to be a problem with RealTek's information provided to open source programmers which is why all of my systems now run Intel Ethernet hardware. Mike Squires
Hello Paul, On Sun, Apr 18, 2021 at 12:20 PM sciguy via talk <talk@gtalug.org> wrote:
I have a desktop computer that dual boots into Ubuntu Studio and Windows 10. It is connected to the internet using a cat-5 cable to my router.
After the last update and rebooting, it turns out that I no longer have ethernet on Linux. This is not true on Windows, as I am writing you this email from the same computer.
I strongly suspect that there is an update issue that is disabling ethernet on Linux. Right now, my computer is in splendid isolation from the rest of the world. I can't even see computer resources from other computers in my apartment. I also can't see the router itself through my browser.
Any ideas as to what to do next to diagnose the problem?
Paul
What does it show when you type /sbin/ifconfig -a in a terminal ? aruna@debian:~$ /sbin/ifconfig -a eth0 Link encap:Ethernet HWaddr d8:50:e6:53:0d:90 inet addr:192.168.2.124 Bcast:192.168.2.255 Mask:255.255.255.0 inet6 addr: xxxx::xxxx:xxxx:xxxx:d90/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:2871734 errors:0 dropped:0 overruns:0 frame:0 TX packets:1934374 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:3777418026 (3.5 GiB) TX bytes:187326708 (178.6 MiB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:2593 errors:0 dropped:0 overruns:0 frame:0 TX packets:2593 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:170133 (166.1 KiB) TX bytes:170133 (166.1 KiB) And what does ip link show ? aruna@debian:~$ ip link 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000 link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff If you see LOWER_UP your interface is up. you can try : aruna@debian:~$ sudo /sbin/ifconfig eth0 up and change the interface to match your own. If you are using iptables sometimes that can mess up the internet connection, very rare but has happened to me when I was initially learning and experimenting with iptables :-) Hope this helps - Aruna
participants (6)
-
Alex Volkov -
Aruna Hewapathirane -
D. Hugh Redelmeier -
David Collier-Brown -
Mike Squires -
sciguy