Hi,
I have a laptop with a rtw_8822be wireless card and boot Debian on it
from an external USB 3.0 SSD. I also configured the wireless regulatory
domain as TR (DFS-ETSI). Things worked fine this way until the v5.16-rc
releases where I have been practically unable to use Wi-Fi. The network
shows as connected but I can't load any website, pings to my router
mostly fail with "Destination Host Unreachable".
I tracked it down to commit 7285eb9693a2 ("rtw88: support adaptivity for
ETSI/JP DFS region"), tried the debugfs toggle mentioned in that commit,
and found a few more things that also work:
- echo 0 | sudo tee /sys/kernel/debug/ieee80211/phy0/rtw88/edcca_enable
- Connecting the SSD through a USB 2.0 hub
- Connecting the SSD to the port on other side of the laptop
- Putting my phone next to the display, "shielding" it from the ports
All combined lead me to think it's interference from USB 3.0 that's the
real cause of my problems.
I also see this mail on a previous version of the patch [1]:
> As mentioned in commit message, the debugfs is expected to be used when debugging
> in noisy environment. In that case, we think all rtw88 devices will probably
> be affected. Besides, we believe that turning EDCCA off is a temporary state under
> debugging.
[1]
https://lore.kernel.org/linux-wireless/61a242c186bf453d80820d81e1c48464@xxxxxxxxxxx/
So I'm not sure what to think and wanted to ask here. Is EDCCA
working-as-intended in my case, meaning I should fix my "noisy
environment"? Or is something wrong with the implementation that should
be debugged? I think it'll be very easy for other people to run into
this issue, maybe it should be disabled by default, or turned into a
module option?
Thanks in advance.
