Wifi problems with Nov 2023 Linux

MiSTer-devel / SD-Installer-Win64_MiSTer

MiSTer SD card installer (Windows 64bit)

GNU General Public License v2.0

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Wifi problems with Nov 2023 Linux #17

Open theypsilon opened 7 months ago

theypsilon commented 7 months ago

It seems like some users are experiencing problems with this wifi dongle after upgrading to the latest Linux version. It's a pretty popular wifi dongle, and it worked fine with previous Linux versions.

sorgelig commented 7 months ago

In exactly latest update there was no change in wifi drivers. There were changes in previous updates. So it's strange

I have this wifi dongle somewhere. I will try to find it.

sorgelig commented 7 months ago

Ok. Found that dongle. Latest linux.img, zImage_dtb. WiFi works fine.

theypsilon commented 7 months ago

Pretty strange indeed. This user who agreed to do rigorous testing could reproduce this in two different setups. He doesn't see the wifi icon showing up at all; it only shows if he also has ethernet connected. I'm trying to convince another user to do such tests. I don't have the dongle, unfortunately.

sorgelig commented 7 months ago

I've rechecked with ethernet disconnected. Still works. One thing: i never used mr.fusion. Neither i use updater because i need special setup due to developing.

Basically my SD card is formatted by this installer. And then i update linux by simple replacing of linux.img and zImage_dtb.

theypsilon commented 7 months ago

The test flow this user is doing is:

Format with Mr.Fusion
Boot with no ethernet, check wifi works
Run updater without updating linux: Create downloader.ini and write
```
[MiSTer]
update_linux = false
```
Reboot, check wifi still works
Remove downloader.ini (or change option to true) and run updater again to upgrade linux
Reboot with no ethernet, wifi doesn't work

It could be that the Mr.Fusion step is relevant here somehow

birdybro commented 7 months ago

@theypsilon Ask that user if they use ganged SSIDs for 2.4ghz and 5ghz (meaning their Router is setup to have one WiFi network for both 2.4ghz band and 5ghz band). The wifi update in August from @gkrzystek enabled 5ghz for that chipset (Realtek 8821CU, VID:PID 0BDA:C820), and I've had issues with linux desktops before handling ganged SSID.