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Fri, 06 Nov 2026 03:36:31 -0800 (PST) Received: from [192.168.1.50] ([81.196.40.160]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4b572caf48bsm146175625e9.11.2026.11.06.03.36.30 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 06 Nov 2026 03:36:30 -0800 (PST) Message-ID: <260010f2-ea55-42a6-b7bf-8600d9b006f8@gmail.com> Date: Fri, 6 Nov 2026 13:36:29 +0200 X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] wifi: rtw88: extend USB TX report timeout to RTL8822BU To: Barak Pearlmutter , linux-wireless@vger.kernel.org References: Content-Language: en-US From: Bitterblue Smith In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 06/11/2026 13:01, Barak Pearlmutter wrote: > I can confirm the "failed to get tx report from firmware" issue on an > RTL8822BU USB adapter and provide additional context about its impact. > > Device: > RTL88x2bu AC1200 USB WiFi adapter > USB ID: 0bda:b812 > Driver: rtw88_8822bu (in-tree) > Firmware: version 30.20.0, H2C version 14 > Kernel: 7.2.15+deb14-amd64 (Debian 13 / linux-image-amd64) > Note: this is a Debian-patched kernel; Debian-specific patches may be > relevant, though the rtw88 driver is unlikely to be heavily patched. > > Symptoms observed: > > 1. Slow-fire mode (possibly normal operation): "failed to get tx report > from firmware" appears roughly every 5 minutes during extended idle > periods. The link remains associated but throughput degrades. > > 2. Rapid-fire mode (fatal): The message appears multiple times per > second. The interface deauthenticates and does not recover without a > USB reset of the device. > > The rapid-fire mode is frequently triggered indirectly by a companion > Realtek Bluetooth adapter (0bda:a725, RTL8761BU) on the same host > entering its own failure loop after USB autosuspend (see separate report > to linux-bluetooth). When the BT device is in a 2-second USB reset > storm, the WiFi "failed to get tx report" messages begin within seconds > and escalate to rapid-fire within ~20 minutes. > > Workarounds currently applied: > - USB autosuspend disabled for 0bda:b812: > ACTION=="add", SUBSYSTEM=="usb", ATTRS{idVendor}=="0bda", > ATTRS{idProduct}=="b812", ATTR{power/autosuspend}="-1" > - WiFi PSM disabled on interface up: > ACTION=="add", SUBSYSTEM=="net", ATTRS{idVendor}=="0bda", > ATTRS{idProduct}=="b812", RUN+="/usr/sbin/iw dev %k set power_save off" > > These reduce but do not eliminate the slow-fire messages. Extending the > TX report timeout as proposed in the referenced patch would address the > root cause. > That's doubtful. It would just hide or delay the messages. I think what you are experiencing is caused by this chip's USB 3 problem: https://lore.kernel.org/linux-wireless/b69f6496-dc12-4662-84ac-aa62d0ceac3f@gmail.com/ It will work better in a USB 2 port. > Relevant log excerpt (slow-fire, link still up): > > kernel: rtw88_8822bu 4-5:1.0: failed to get tx report from firmware > [~5 minutes pass] > kernel: rtw88_8822bu 4-5:1.0: failed to get tx report from firmware > [repeat] > > Relevant log excerpt (rapid-fire leading to deauth): > > kernel: rtw88_8822bu 4-5:1.0: failed to get tx report from firmware > kernel: rtw88_8822bu 4-5:1.0: failed to get tx report from firmware > kernel: rtw88_8822bu 4-5:1.0: failed to get tx report from firmware > kernel: rtw88_8822bu 4-5:1.0: failed to get tx report from firmware > kernel: wlx1cbfceb2abdb: deauthenticating from cc:2d:21:70:11:fd by local choice (Reason: 3=DEAUTH_LEAVING) > kernel: usb 4-5: reset SuperSpeed USB device number 3 using xhci_hcd > kernel: rtw88_8822bu 4-5:1.0: Firmware version 30.20.0, H2C version 14 > [reconnects after USB reset] > > Happy to test a patched kernel or provide further information. > An equivalent patch made it into kernel 7.4, so you can test that if you want. > Barak Pearlmutter