Am 14.01.24 um 19:00 schrieb Jouni Malinen:
On Fri, Jan 05, 2024 at 10:46:57AM +0100, Julian Sikorski wrote:
I am trying to figure out why gnome-network-displays is unable to establish
a P2P connection with my Fire TV stick. I originally reported it to
gnome-network displays, then to NetworkManager before being directed here.
In brief, the p2p connection never goes up so I can never attempt to capture
packets using wireshark or tcpdump. Same laptop and same Fire TV Stick work
fine from Windows 11.
I am attaching the wpa_supplicant debug log. Thank you for your help in
advance.
Which WLAN driver are you using on this device (wlp1s0)?
I am using iwlwifi/iwlmvm. The hardware is Intel Wi-Fi 6 AX200.
It looks like the peer device might be using power saving mechanism
(Notice of Absence) that would require the local driver to be able to
synchronize the transmissions appropriately to be able to get them
through. The debug log here indicated that none of the numerous attempts
of sending a GO Negotiation Request to the peer resulted in the frame
being acknowledged which could imply that it was not listening at the
time the request went out. That said, it is difficult to say for certain
since the peer discovery part did succeed. In any case, this type of an
issue might require looking in more detail to a sniffer capture of the
IEEE 802.11 frames and the exact timing of them and/or figuring out what
kind of capabilities the local driver has for P2P.
Sniffer would be a special hardware, correct? Like rtl-sdr? I have a 2.4
GHz Spectrum Analyzer but this is probably not what we need. Can a
sniffer be fashioned out of a second laptop?
A while back miracast used to work intermittently, which is when I filed
https://gitlab.gnome.org/GNOME/gnome-network-displays/-/issues/285,
suspecting the issue is caused by IPv6 vs IPv4. Now I can no longer get
the connection to work under linux at all.
Best regards,
Julian
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