Hi Steve, Am Di, 15. Jun 2021, um 22:26, schrieb Steve deRosier: > Hi Manuel, > > On Tue, Jun 15, 2021 at 8:25 AM Manuel Wagesreither <ManWag@xxxxxxxxxxx> wrote: > > > > Hello all, > > > > I'm working on a project which is using wpa_supplicant 2.9 with NetworkManager 1.22.10 on a NVIDIA Jetson TX2 system-on-module using a CYW4354=BCM4354. The GNU/Linux distribution is a custom one created with Yocto; the kernel used is 4.9.140-l4t-r32.4+g3924d6fccfbf provided by NVIDIA. > > > > I expect you aren't going to get a lot of help here. You're asking > about a 5+ year old vendor kernel with a Broadcom vendor driver, ie > not fully open source and upstream stuff. And you're asking about > largely driver oriented stuff on the hostapd list. Granted, a lot of > the same people are on multiple lists, so you'll hit a subset of the > linux-wireless folk too. Since your stuff is provided by NVIDIA, I'd > suggest asking them for support. I agree I should seek contact with NVIDIA support. Need to check first if the problem occurs with their official Ubuntu Fork as well, otherwise they won't give support. As of linux-wireless, I was unaware of that list, so thank you for pointing that out. > > > > I observed the following behaviour: > > 1. The error message `Failed to enable signal strength monitoring` shows up in our logs. > > It's not necessarily an error message. Do you need to enable "signal > strength monitoring"? The drivers often output lots of information, > you still need to evaluate if you actually care. I'm guessing > everything works fine and you don't care. > > > 2. When roaming to a access point with a similar SSID, roaming works. (WebRTC video stream stutters but doesn't break.) > > 3. When roaming to an access point with a different SSID, the "Dongle Host Driver" (which is a kernel module I guess?) restarts. > > Typically switching to a different SSID is not considered "roaming." > And thus would typically have a more intense change. Indeed, if you > look at your kernel log above your marked point, it's clear that the > stack is being fully torn down and it looks like the WiFi chip's bus > is being powered down, which usually results in an unload of the > driver. And then powered back up reloads the driver which reloads the > firmware. > > DHD or "Dongle Host Driver" is the Broadcom proprietary vendor driver > for their WiFi chips. > > I hope that helps you understand at least a little bit. > > - Steve > Much appreciated, it indeed does. - Manuel _______________________________________________ Hostap mailing list Hostap@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/hostap
