On 2024-09-25 13:46, Bitterblue Smith wrote:
Hi,
I have this problem with RTL8811CU, RTL8723DU, RTL8811AU, RTL8812AU.
I assume all USB devices are affected. If I have qBittorrent running,
the wifi stops working after a few hours:
Sep 24 00:48:21 ideapad2 wpa_supplicant[1290]: wlp3s0f3u2i2:
CTRL-EVENT-BEACON-LOSS
Sep 24 00:48:21 ideapad2 kernel: rtw_8723du 1-2:1.2: failed to get tx
report from firmware
Sep 24 00:48:23 ideapad2 wpa_supplicant[1290]: wlp3s0f3u2i2:
CTRL-EVENT-BEACON-LOSS
Sep 24 00:48:23 ideapad2 kernel: rtw_8723du 1-2:1.2: failed to get tx
report from firmware
Sep 24 00:48:25 ideapad2 wpa_supplicant[1290]: wlp3s0f3u2i2:
CTRL-EVENT-BEACON-LOSS
Sep 24 00:48:25 ideapad2 kernel: rtw_8723du 1-2:1.2: failed to get tx
report from firmware
Sep 24 00:48:27 ideapad2 wpa_supplicant[1290]: wlp3s0f3u2i2:
CTRL-EVENT-BEACON-LOSS
Sep 24 00:48:27 ideapad2 kernel: rtw_8723du 1-2:1.2: failed to get tx
report from firmware
Sep 24 00:48:29 ideapad2 wpa_supplicant[1290]: wlp3s0f3u2i2:
CTRL-EVENT-BEACON-LOSS
Sep 24 00:48:29 ideapad2 kernel: rtw_8723du 1-2:1.2: failed to get tx
report from firmware
Sep 24 00:48:31 ideapad2 wpa_supplicant[1290]: wlp3s0f3u2i2:
CTRL-EVENT-BEACON-LOSS
Sep 24 00:48:31 ideapad2 kernel: rtw_8723du 1-2:1.2: failed to get tx
report from firmware
Sep 24 00:48:33 ideapad2 wpa_supplicant[1290]: wlp3s0f3u2i2:
CTRL-EVENT-BEACON-LOSS
Sep 24 00:48:33 ideapad2 kernel: rtw_8723du 1-2:1.2: failed to get tx
report from firmware
Sep 24 00:48:35 ideapad2 wpa_supplicant[1290]: wlp3s0f3u2i2:
CTRL-EVENT-BEACON-LOSS
Sep 24 00:48:35 ideapad2 kernel: rtw_8723du 1-2:1.2: failed to get tx
report from firmware
Sep 24 00:48:37 ideapad2 wpa_supplicant[1290]: wlp3s0f3u2i2:
CTRL-EVENT-BEACON-LOSS
Sep 24 00:48:37 ideapad2 kernel: rtw_8723du 1-2:1.2: failed to get tx
report from firmware
Sep 24 00:48:39 ideapad2 wpa_supplicant[1290]: wlp3s0f3u2i2:
CTRL-EVENT-BEACON-LOSS
Sep 24 00:48:39 ideapad2 kernel: rtw_8723du 1-2:1.2: failed to get tx
report from firmware
Sep 24 00:48:41 ideapad2 wpa_supplicant[1290]: wlp3s0f3u2i2:
CTRL-EVENT-BEACON-LOSS
Sep 24 00:48:41 ideapad2 kernel: rtw_8723du 1-2:1.2: failed to get tx
report from firmware
Sep 24 00:48:42 ideapad2 wpa_supplicant[1290]: wlp3s0f3u2i2:
CTRL-EVENT-DISCONNECTED bssid=... reason=4 locally_generated=1
Sep 24 00:48:42 ideapad2 wpa_supplicant[1290]: wlp3s0f3u2i2: Added
BSSID ... into ignore list, ignoring for 10 seconds
Sep 24 00:48:42 ideapad2 NetworkManager[433]: <info> [1727128122.0377]
device (wlp3s0f3u2i2): supplicant interface state: completed ->
disconnected
Sep 24 00:48:45 ideapad2 NetworkManager[433]: <info> [1727128125.6030]
device (wlp3s0f3u2i2): supplicant interface state: disconnected ->
scanning
Sep 24 00:48:47 ideapad2 wpa_supplicant[1290]: wlp3s0f3u2i2: Removed
BSSID ... from ignore list (clear)
Sep 24 00:48:47 ideapad2 wpa_supplicant[1290]: wlp3s0f3u2i2: SME:
Trying to authenticate with ... (SSID='...' freq=2472 MHz)
Sep 24 00:48:50 ideapad2 kernel: wlp3s0f3u2i2: authenticate with ...
(local address=,,,)
Sep 24 00:48:51 ideapad2 NetworkManager[433]: <info> [1727128131.2488]
device (wlp3s0f3u2i2): supplicant interface state: scanning ->
authenticating
Sep 24 00:48:51 ideapad2 kernel: wlp3s0f3u2i2: send auth to ... (try
1/3)
Sep 24 00:48:51 ideapad2 kernel: rtw_8723du 1-2:1.2: failed to get tx
report from firmware
Sep 24 00:48:52 ideapad2 kernel: wlp3s0f3u2i2: send auth to ... (try
2/3)
Sep 24 00:48:52 ideapad2 kernel: rtw_8723du 1-2:1.2: failed to get tx
report from firmware
Sep 24 00:48:53 ideapad2 kernel: wlp3s0f3u2i2: send auth to ... (try
3/3)
Sep 24 00:48:53 ideapad2 kernel: rtw_8723du 1-2:1.2: failed to get tx
report from firmware
Sep 24 00:48:54 ideapad2 kernel: wlp3s0f3u2i2: authentication with ...
timed out
After this all scans return nothing. The chip is still alive,
though. The LED blinks during the scans (it's hardware-controlled)
and another device in monitor mode can see the probe requests.
I confirmed that even C2H stop coming. I used aireplay-ng to send
some authentication or association frames (can't remember) which
require TX ACK report. I saw "failed to get tx report from firmware"
and no C2H.
While qBittorrent is needed to trigger this bug, simply downloading
a random Linux iso did not do the job. "Other" torrents did. It's
unclear why. Maybe it's uploading that triggers the bug.
I left iperf3 running all day and nothing happened. Only qBittorrent
can break it.
RTL8822CE doesn't have this problem. I can use qBittorrent with it
just fine.
I mounted debugfs and dumped the MAC registers during a scan using
this command:
for i in {00..20}; do sleep 0.5; cat
/sys/kernel/debug/ieee80211/phy2/rtw88/mac_{0..7} > dead-$i.txt; done
I thought maybe some RX URBs failed silently and rtw88 stopped
sending them to the device (== stopped requesting data from it),
but that's not the case. [1]
I have the device in this state right now. Is there anything else
I should look at?
What hardware are you running on? This looks very similar to some issue
me and some colleagues have seen from time-to-time when using LM842
(8822cu)[1][2][3], when running it on our i.MX6SX arm board. It has thou
been harder and harder to trigger that issue on our board. But the
outcome when it happens is identical to your. In our case we get it when
running a number of mender streamed installations. We also can trigger
something similar when doing hw-offload scanning, so we have disabled
that in our setup. For us however it seems related to slower platforms,
we haven't seen it on systems with better performance. Also it become a
lot better when the USB RX aggregation was added to the chip + running
with the patch in [3]. We also got it on LM808 (8812AU) then after
suggestion we tried morrownr driver [4] with USB aggregation enabled and
couldn't trigger it anymore. But feels like all these things are just
ways to reduce the risk of getting into this state. So I think you just
found yet another way to reproduce the behavior. So hopefully that is
the first step of finding the root cause of it. I will gladly help to
test things in this area if you guys find something interesting.
[1]
https://lore.kernel.org/all/20230526055551.1823094-1-petter@xxxxxxxxxx/t/
[2]
https://lore.kernel.org/linux-wireless/20230616122612.GL18491@xxxxxxxxxxxxxx/T/#t
[3]
https://lore.kernel.org/linux-wireless/20230612134048.321500-1-petter@xxxxxxxxxx/
[4] https://github.com/morrownr/8812au-20210820
[1]
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/drivers/net/wireless/realtek/rtw88/usb.c?h=v6.10.11&id=25eaef533bf3ccc6fee5067aac16f41f280e343e#n641
