[SOLVED] Internet connection fails after UnionTech OS wakes from suspension.

Matthew Wai · 06-10-2022, 02:40 AM

I am running UnionTech OS (often abbreviated to "UOS"), which is based on Deepin.

I have set up a PPPoE connection, which works fine after UOS has started. However, it does not work after UOS has woken from suspension. It will not work again even after I have run "pon dsl-provider". It will work again only after a reboot. How can I get it to work without a reboot?
A screenshot: https://www.linuxquestions.org/quest...p;d=1654869298

business_kid · 06-10-2022, 08:15 AM

Can you stop the network as part of the suspension procedure? With dhcp, it's easier as the server assigns an ip and the dhcp program can ask "Am I still good with that IP?"

Stop the network manually first then restart it after. You can get to automating it later.

Matthew Wai · 06-10-2022, 08:55 AM

Quote:

Originally Posted by business_kid

Can you stop the network as part of the suspension procedure?

I just did the following test:
I stopped networking and then suspended UOS. I woke it up and started networking. It was still unable to connect "Wired Connection".

Code:

Matthew_Wai@MatthewWai:~$ sudo /etc/init.d/networking stop
[sudo] password for Matthew_Wai: 
Verification successful
[ ok ] Stopping networking (via systemctl): networking.service.
Matthew_Wai@MatthewWai:~$ /etc/init.d/networking status
● networking.service - Raise network interfaces
   Loaded: loaded (/lib/systemd/system/networking.service; enabled; vendor preset: enabled)
   Active: inactive (dead) since Fri 2022-06-10 21:32:29 CST; 1min 42s ago
     Docs: man:interfaces(5)
  Process: 770 ExecStart=/sbin/ifup -a --read-environment (code=exited, status=0/SUCCESS)
  Process: 18457 ExecStop=/sbin/ifdown -a --read-environment --exclude=lo (code=exited, status=0/SUCCESS)
 Main PID: 770 (code=exited, status=0/SUCCESS)

Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.
Matthew_Wai@MatthewWai:~$ sudo /etc/init.d/networking start
[ ok ] Starting networking (via systemctl): networking.service.
Matthew_Wai@MatthewWai:~$ /etc/init.d/networking status
● networking.service - Raise network interfaces
   Loaded: loaded (/lib/systemd/system/networking.service; enabled; vendor preset: enabled)
   Active: active (exited) since Fri 2022-06-10 21:35:43 CST; 18s ago
     Docs: man:interfaces(5)
  Process: 19806 ExecStart=/sbin/ifup -a --read-environment (code=exited, status=0/SUCCESS)
 Main PID: 19806 (code=exited, status=0/SUCCESS)
Matthew_Wai@MatthewWai:~$ ifconfig -a
enp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet6 fe80::ebb8:dcde:c545:31fc  prefixlen 64  scopeid 0x20<link>
        ether e0:d5:5e:cc:65:a3  txqueuelen 1000  (Ethernet)
        RX packets 20155  bytes 5894685 (5.6 MiB)
        RX errors 0  dropped 6  overruns 0  frame 0
        TX packets 46543  bytes 17961096 (17.1 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 28  base 0xd000  

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 33344  bytes 2464508 (2.3 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 33344  bytes 2464508 (2.3 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Matthew_Wai@MatthewWai:~$

business_kid · 06-10-2022, 02:37 PM

You'll probably have to go through the palaver of stopping every program, flushing the address & bringing down the interface, etc before a restart.

Matthew Wai · 06-10-2022, 11:23 PM

Quote:

Originally Posted by business_kid

You'll probably have to go through the palaver of stopping every program, flushing the address & bringing down the interface, etc before a restart.

How can I flush the address? What interface do you mean?

business_kid · 06-11-2022, 11:20 AM

Quote:

Originally Posted by Matthew Wai

How can I flush the address? What interface do you mean?

This way

Code:

  /sbin/ip address flush dev eth0

and adjust 'eth0' if your network device is different.

Matthew Wai · 06-14-2022, 01:29 AM

My PPPoE connection just failed again after suspension.
I opened Terminal and ran the following commands to re-enable the network adapter:

Code:

sudo ip link set enp2s0 down && sudo ip link set enp2s0 up

However, the connection still failed.
Then, I opened Device Manager, manually disabled the network adapter and re-enabled it. Then, the connection worked again.

Quote:

Originally Posted by business_kid

You can get to automating it later.

How can I automate it via commands? What commands can be used instead of "ip link set"?

business_kid · 06-14-2022, 06:11 AM

I don't have Union Tech OS. There's a problem with less well known distros. Developers are few, experience is limited, an when it come to something like suspend & restart working on ALL laptops, they can't compete.

Your best bet is to develop the suspend script yourself. In this case shut down the network before suspend, & resume afterwards. Then, when it's working, submit the changes.

Matthew Wai · 06-14-2022, 11:38 PM

Quote:

Originally Posted by business_kid

I don't have Union Tech OS. There's a problem with less well known distros.

I asked the same question on the official forum of UnionTech OS. A member there has provided the following commands, which have solved my problem:

Code:

sudo rmmod -fv r8168 && sudo modprobe -v r8168

"r8168" refers to the kernel module of the Ethernet controller.

The members on the forum there write in Chinese, while I write in English. That is a problem.

I just found that the option "f" can be removed from the above commands. There is no need to force it.

business_kid · 06-15-2022, 06:31 AM

So I was fairly close telling you to shut down the network. Removing the module disturbs things a bit more, but it might need that.