Re: [ubuntu-studio-users] [GTALUG] Network disabled on PC after last update
Hello Paul, On Sun, Apr 18, 2021 at 12:20 PM 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? > > 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: :::::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) loLink 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: 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: 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 -- ubuntu-studio-users mailing list ubuntu-studio-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users
Re: [ubuntu-studio-users] Network disabled on PC after last update
I have a system running 20.04 on a Dell T7600 with motherboard audio and a Presonus 24C USB interface; haven't seen that problem although I've been updating regularly. I'll watch out for it, however. Thanks! Mike Squires On 4/19/21 2:32 PM, Ross Gammon wrote: Hi Paul, On 18/04/2021 18:20, sciguy 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 If you updated Ubuntu a while back and haven't used it for a while, you may have been hit by a bug caused by some of the kernel security releases causing network connectivity to fail if you have a USB audio device. This happened to me a couple of times after an update. The solution was to reboot and select an old version of the kernel in the GRUB menu. If you are lucky, that version of the kernel will have a working network and you can do an update of the system. The latest kernels do not have the problem. This is a bit of a guess, because you gave more information about your Windows version than your Ubuntu Studio version. :-) Regards, Ross -- Michael L. Squires, Ph.D., M.P.A. 546 North Park Ridge Road Bloomington, IN 47408 Known in the SCA as Alan Culross, KSCA, OP, etc. "Michael Leslie Squires" on FB Home phone: 812-333-6564 Cell phone: 812-369-5232 www.siralan.org (personal) or www.smithgreensound.com (PA) UN*X at home since 1985 -- ubuntu-studio-users mailing list ubuntu-studio-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users
Re: [ubuntu-studio-users] Network disabled on PC after last update
Hi Paul, On 18/04/2021 18:20, sciguy 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 If you updated Ubuntu a while back and haven't used it for a while, you may have been hit by a bug caused by some of the kernel security releases causing network connectivity to fail if you have a USB audio device. This happened to me a couple of times after an update. The solution was to reboot and select an old version of the kernel in the GRUB menu. If you are lucky, that version of the kernel will have a working network and you can do an update of the system. The latest kernels do not have the problem. This is a bit of a guess, because you gave more information about your Windows version than your Ubuntu Studio version. :-) Regards, Ross -- ubuntu-studio-users mailing list ubuntu-studio-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users
