WiFi on an up to date Debian 11.2 works very badly compared to an old Ubuntu 18.04 on the same hardware and same testing conditions. I'm wondering what would be a sensible way of isolating the cause?
As far as I can see both OSes use the
ath5k driver for WiFi so my guess is a difference between driver versions, but even so I don't know how I'd confirm that. Is there an easy way?
And if it turns out it's the driver, are there any viable fixes?
- I've ruled out hardware problems; it's one and the same machine, and it's repeatable. Same symptoms using different access points. The machine is stationary during testing.
- Symptoms in Debian 11 include very slow browsing of folder structure over SMB, and constant interruptions when playing a low def video over SMB using VLC. None of that in Ubuntu (Mate) 18.04.
- Can't really update Ubuntu since it dropped 32 bit support. Hoping for an alternative solution.