krlvm
Altered network behavior on Linux even when not running
At some point I tried to install and utilize PowerTunnel on Kubuntu 24.10 as I was trying to assist a friend also running Kubuntu in using it, however in the end it didn't work for what he wanted. Since then, however, even though I do not have PowerTunnel running, and I've disabled proxy use in system settings, I've been encountering all kinds of network issues mainly with the Discover software center (the main graphical way of managing packages on Kubuntu), though I've also had similar issues with the driver manager [same error codes].
One example set of errors are as follows:
E: http://us.archive.ubuntu.com/ubuntu oracular InRelease is not (yet) available (Could not connect to 127.0.0.1:8085 (127.0.0.1). - connect (111: Connection refused)) E: http://us.archive.ubuntu.com/ubuntu oracular-updates InRelease is not (yet) available (Unable to connect to 127.0.0.1:8085:) E: http://security.ubuntu.com/ubuntu oracular-security InRelease is not (yet) available (Could not connect to 127.0.0.1:8085 (127.0.0.1). - connect (111: Connection refused)) E: http://us.archive.ubuntu.com/ubuntu oracular-proposed InRelease is not (yet) available (Unable to connect to 127.0.0.1:8085:) E: http://security.ubuntu.com/ubuntu focal-security InRelease is not (yet) available (Unable to connect to 127.0.0.1:8085:)
I believe this is related to PowerTunnel given it's referencing connections to a local address [127.0.0.1] and the port matches the default PowerTunnel port 8085. I'd like to correct this if at all possible so I can properly download updates and change drivers from the gui rather than having to use terminal commands to get around this.
Any help would be greatly appreciated!
Seems like system proxy was not actually disabled, did you check if HTTP_PROXY environment variable is set?
As far as I've been able to identify, HTTP_PROXY has no proxy set; I've checked every file I know of for environment variables related to proxies and there are none set. I found the stored data for the proxy in the KDE Config (but also a line indicating the proxy is disabled) but to be extra safe I cleared the settings from there anyways and restarted, to no avail. In the OS GUI it is totally absent as well. The problem also occurs for my friend who also tried PowerTunnel on Kubuntu, if that information helps at all.
That's weird because PowerTunnel can't automatically configure a system proxy server on Linux, it can only do this on Windows - do you remember how did you configured it system-wide?
If the problem occurs only with apt, check if you have proxy server set in /etc/apt/apt.conf