High CPU usage when using bridges on Ubuntu 24.10

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1
  • Operating System you are using: Ubuntu 24.10, Kubuntu to be precised
  • Tor Browser version: 14.0.4
  • Tor Browser Security Level: Standard
  • Step by step of how you got to the issue, so we can reproduce it: First, make sure “I use a proxy to connect” is not ticked (I use that option cause I live in a place where I can’t connect to Tor directly). Then choose a bridge. Any bridge.
  • The Tor log: it just says “Application request when we haven't used client functionality lately. Optimistically trying known bridges again”. IPv6Traffic and PreferIPv6 are found on the executing command, despite I have no IPV6 access.

Plus I can’t connect to Tor via command line, the output says “Delaying directory fetches: No running bridges”, despite bridges are provided through the torrc file. The error would not appear on Ubuntu 24.04.

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Same for me.
On any Ubuntu 24.10 no PluggableTransport works.
Tor hangs on “Delaying directory fetches: No running bridges” also to me for many many minutes. Meanwhile CPU goes 100%.

Tried lyredbird + obfs4 + webtunnel. All have the issue.
Not a “go” problem, i think, since i recompiled in the same machine the webtunnel client, no success :woman_shrugging:
Maybe a kernel problem. No dmesg errors or others in system logs.

On 24.04 they all work :woman_shrugging::woman_shrugging::woman_shrugging: