On 28/06/2023 13:35, Giulio Paci wrote: > Il mer 28 giu 2023, 03:29 Ping-Ke Shih <pkshih@xxxxxxxxxxx> ha scritto: >> Try below options to see if they can help: >> >> 1. try another band (switch from 2GHz to 5GHz or opposite) > > I tried to force 5GHz. And then to force 2GHz. When connected to 5GHz > it seems a little bit more stable, but still hangs within seconds. > >> 2. try another AP > > I have tried 2 different AP, but the situation is very similar with > both. One of them supports only b/g/n, so I was able to change band > only with the other one (which is a hotspot on Android phone). > >> 3. disable WiFi power save by >> rtw88_core.ko disable_lps_deep=1 >> or >> iw wlan0 set power_save off > > I tried setting disable_lps_deep=1, but still the connection seems unstable. > >> By the way, when you try disable_aspm=1 and disable_msi=1, I suggest to >> create a file and add them to /etc/modprobe.d/, and then shutdown and turn on >> your computer after a while. Because some PCI settings are persistent if only >> do rmmod/insmod. > > I confirm this is the approach I used in all my attempts, including > disable_lps_deep=1. > I also checked /sys/module/$module/parameters/$option content, to > confirm that the options were correctly set. > > I have also carried out some additional attempts: > > - boot with iommu.passthrough=1 instead of pcie_aspm=off, but it does > not seem to improve anything (and AER errors came back in the dmesg); > - After my comments on https://github.com/lwfinger/rtw88/issues/150, > https://github.com/lwfinger/rtw88/ was updated and I was able to load > these modules. The connection is still very unstable, but with these > modules, when the connection hangs, dmesg reports: > > rtw_8822ce 0000:03:00.0: firmware failed to leave lps state > > sometimes followed by: > > rtw_8822ce 0000:03:00.0: failed to send h2c command > > I have tried to set some of the options above using modules from > https://github.com/lwfinger/rtw88/, but so far, apart from these > additional messages, the results are almost identical to the > precompiled modules that come with Debian. > > > One of my colleagues has the same hardware (same AP model and same > laptop model) and also tried to install Debian bookworm on it. I asked > to check if he experiences the same issue, but in his case he was able > to stay connected for a few hours without any issue. > I wonder if the issue I am experiencing could be due to defective > hardware (initially I excluded it since the same configuration is very > stable under Windows). Is there any specific test that I can try to > exclude hardware issues? > > Bests, > Giulio You can swap the wifi cards in the two laptops. Make sure to unplug the charger and the battery before working inside.
