From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 00C05182B4 for ; Sun, 20 Jul 2025 11:30:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753011060; cv=none; b=gZnJLtn7Nhb4xBstRqK/WjAutHCtpxSnG3pCzmavDILSMXQ4CGt+cU817oIUw/k64UCV+zzQOKgjMVDgB00jRA+ay4tke4KNt/65kLzkizj2v+8d1g+mIgKsA/muUXhEJQj1WxjObCEG9JJP26w0lQLpxVOZmF9ulHQknjWBBQg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753011060; c=relaxed/simple; bh=XHe8wDNNYuDASKVp/guFabGjqjzljkj5y5cMalc/vs8=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=TZqoM84SjRerg0OH8fo5gGSayEs9+R8+UT16aWZsG74LU9xpjo4lFe0QUGlDGO2AsMM+mxMB6V5lOduui06pFfppRT6aNZG8XjIq/haMTPUe8fZ9m9tE65mVXvgtLUMYVBf74kqCeAj+mggegOTzIR7VtTN+ymykGpxXQ8TaTqo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=WMIk8Laz; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="WMIk8Laz" Received: by smtp.kernel.org (Postfix) with ESMTPS id 8A52CC4CEF6 for ; Sun, 20 Jul 2025 11:30:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1753011059; bh=XHe8wDNNYuDASKVp/guFabGjqjzljkj5y5cMalc/vs8=; h=From:To:Subject:Date:In-Reply-To:References:From; b=WMIk8LazpBV3tam38BKmQz08iv9YwiTqPXPwqwO027biSrM+00l4uYyeRzZPLPY5S vBrCVR3YsDfOf8jT/OztNKzam1R8uuzHSwVkTOIN+6h44RoYw1tQz1A/1W5xzjnh7d rCRVdlLjFs9FspHqMB7cDoIl/yn/8VyaD4RCSQRUvBMuBl8ggmIUWngFkWv300PUGO FPdg6Uzxj7sLFcZr3oiDBL5OsOiIiJ8/ci2rJ8iQF4V/YgyCLPEJ3A8Fott70F0FH2 vHEaZRBfOTsTTL/HY+rWbH5bYZ8bblsgRKRb2yxprBHpPDYe2TH13Eo6Klb0Mn2YUw nncgkOTWQ2a7w== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 7BA3DC53BC5; Sun, 20 Jul 2025 11:30:59 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-bluetooth@vger.kernel.org Subject: [Bug 220344] Intel AX211 bluetooth randomly disconnects and reconnects, started after kernel update Date: Sun, 20 Jul 2025 11:30:59 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Drivers X-Bugzilla-Component: Bluetooth X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: tal.lich@gmail.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: linux-bluetooth@vger.kernel.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D220344 --- Comment #5 from Tal Licht (tal.lich@gmail.com) --- Update - unfortunately Bluetooth did start disconnecting, it only took a bit longer this time. So no improvement even after downgrading the firmware :( [ 4945.041226] Bluetooth: hci0: Hardware error 0x0c [ 4945.055323] Bluetooth: hci0: Retrieving Intel exception info failed (-16) [ 5413.818394] Bluetooth: hci0: Hardware error 0x0c [ 5413.832258] Bluetooth: hci0: Retrieving Intel exception info failed (-16) [ 6078.608374] Bluetooth: hci0: Hardware error 0x0c [ 6078.622543] Bluetooth: hci0: Retrieving Intel exception info failed (-16) [ 6154.472547] Bluetooth: hci0: Hardware error 0x0c [ 6154.486464] Bluetooth: hci0: Retrieving Intel exception info failed (-16) [ 6323.107517] Bluetooth: hci0: Hardware error 0x0c [ 6323.121611] Bluetooth: hci0: Retrieving Intel exception info failed (-16) [ 9253.552312] Bluetooth: hci0: Hardware error 0x0c [ 9253.566433] Bluetooth: hci0: Retrieving Intel exception info failed (-16) [10010.348140] Bluetooth: hci0: link tx timeout [10010.348160] Bluetooth: hci0: killing stalled connection 38:18:4c:be:34:1d [10371.646448] Bluetooth: hci0: Hardware error 0x0a [10371.660506] Bluetooth: hci0: Retrieving Intel exception info failed (-16) [10547.126313] Bluetooth: hci0: Hardware error 0x0c [10547.140440] Bluetooth: hci0: Retrieving Intel exception info failed (-16) [10602.005441] Bluetooth: hci0: Hardware error 0x0a [10602.019402] Bluetooth: hci0: Retrieving Intel exception info failed (-16) [11660.598378] Bluetooth: hci0: Hardware error 0x0a [11660.612383] Bluetooth: hci0: Retrieving Intel exception info failed (-16) On Sun, 20 Jul 2025 at 12:02, Tal Lichtenstein wrote: > I've tried going back to the bluetooth firmware that was current at the > date the computer was originally installed - 9/Sep/2023. > > On this date, these firmware files were current: > > ibt-0040-0041.sfi - commit 555452997994b250477de4a03b322dc53513d05a dated > 2023-08-28 > ibt-0040-0041.ddc - commit b7e0c80b00bb4e3d4c845f2270c5c0c8262154ca dated > 2021-09-15 > iwlwifi-so-a0-gf-a0-86.ucode - > commit f27dec616e29e44cd90645926c1459639d112c3d dated 2023-11-16 - *this > is still the current version today* > > I switched the files in /lib/firmware to these versions and rebooted: > > root@licht-t14s:~# dmesg | grep -E '(hci0|iwlwifi)' > [ 30.809390] iwlwifi 0000:00:14.3: enabling device (0000 -> 0002) > [ 30.830430] iwlwifi 0000:00:14.3: Detected crf-id 0x400410, cnv-id > 0x80400 wfpm id 0x80000020 > [ 30.830491] iwlwifi 0000:00:14.3: PCI dev 51f1/0090, rev=3D0x370, > rfid=3D0x2010d000 > [ 30.835929] iwlwifi 0000:00:14.3: TLV_FW_FSEQ_VERSION: FSEQ Version: > 0.0.2.41 > *[ 30.836818] iwlwifi 0000:00:14.3: loaded firmware version > 86.fb5c9aeb.0 so-a0-gf-a0-86.ucode op_mode iwlmvm* > [ 30.839236] Bluetooth: hci0: Device revision is 0 > [ 30.839241] Bluetooth: hci0: Secure boot is enabled > [ 30.839242] Bluetooth: hci0: OTP lock is enabled > [ 30.839243] Bluetooth: hci0: API lock is enabled > [ 30.839244] Bluetooth: hci0: Debug lock is disabled > [ 30.839245] Bluetooth: hci0: Minimum firmware build 1 week 10 2014 > [ 30.839246] Bluetooth: hci0: Bootloader timestamp 2019.40 buildtype 1 > build 38 > [ 30.840962] Bluetooth: hci0: DSM reset method type: 0x00 > *[ 30.844291] Bluetooth: hci0: Found device firmware: > intel/ibt-0040-0041.sfi* > [ 30.844304] Bluetooth: hci0: Boot Address: 0x100800 > *[ 30.844305] Bluetooth: hci0: Firmware Version: 254-28.23* > [ 30.982422] iwlwifi 0000:00:14.3: Detected Intel(R) Wi-Fi 6E AX211 > 160MHz, REV=3D0x370 > [ 31.158040] iwlwifi 0000:00:14.3: WFPM_UMAC_PD_NOTIFICATION: 0x20 > [ 31.158093] iwlwifi 0000:00:14.3: WFPM_LMAC2_PD_NOTIFICATION: 0x1f > [ 31.158101] iwlwifi 0000:00:14.3: WFPM_AUTH_KEY_0: 0x90 > [ 31.158109] iwlwifi 0000:00:14.3: CNVI_SCU_SEQ_DATA_DW9: 0x0 > [ 31.158396] iwlwifi 0000:00:14.3: loaded PNVM version e28bb9d7 > [ 31.159564] iwlwifi 0000:00:14.3: RFIm is deactivated, reason =3D 4 > [ 31.174653] iwlwifi 0000:00:14.3: Detected RF GF, rfid=3D0x2010d000 > [ 31.244329] iwlwifi 0000:00:14.3: base HW address: 10:f6:0a:05:ba:09 > [ 31.260051] iwlwifi 0000:00:14.3: iwlmvm doesn't allow to disable BT > Coex, check bt_coex_active module parameter > [ 31.294784] iwlwifi 0000:00:14.3 wlp0s20f3: renamed from wlan0 > [ 31.793193] iwlwifi 0000:00:14.3: WFPM_UMAC_PD_NOTIFICATION: 0x20 > [ 31.793252] iwlwifi 0000:00:14.3: WFPM_LMAC2_PD_NOTIFICATION: 0x1f > [ 31.793260] iwlwifi 0000:00:14.3: WFPM_AUTH_KEY_0: 0x90 > [ 31.793269] iwlwifi 0000:00:14.3: CNVI_SCU_SEQ_DATA_DW9: 0x0 > [ 31.794692] iwlwifi 0000:00:14.3: RFIm is deactivated, reason =3D 4 > [ 31.892352] iwlwifi 0000:00:14.3: Registered PHC clock: iwlwifi-PTP, > with index: 0 > [ 32.392539] Bluetooth: hci0: Waiting for firmware download to complete > [ 32.393277] Bluetooth: hci0: Firmware loaded in 1512675 usecs > [ 32.393369] Bluetooth: hci0: Waiting for device to boot > [ 32.409352] Bluetooth: hci0: Device booted in 15680 usecs > *[ 32.409513] Bluetooth: hci0: Found Intel DDC parameters: > intel/ibt-0040-0041.ddc* > [ 32.412401] Bluetooth: hci0: Applying Intel DDC parameters completed > *[ 32.415476] Bluetooth: hci0: Firmware timestamp 2023.28 buildtype 1 > build 68350* > [ 32.415482] Bluetooth: hci0: Firmware SHA1: 0xc64314a8 > [ 32.587297] Bluetooth: hci0: Bad flag given (0x1) vs supported (0x0) > [ 32.587398] Bluetooth: hci0: Bad flag given (0x1) vs supported (0x0) > [ 32.587484] Bluetooth: hci0: Bad flag given (0x1) vs supported (0x0) > [ 32.587627] Bluetooth: hci0: Bad flag given (0x1) vs supported (0x0) > > Bluetooth keyboard, mouse and headphones connected automatically. I then > proceeded to play some music in Spotify which in my experience shortens t= he > time until the disconnection issue happens. > > Sure enough after less than 1 minute I started hearing bluetooth sound > hiccups which indicate a problem with the bluetooth connection. These > repeat occasionally. > ***However**, *the devices DID NOT disconnect even after 1 hour of > continuous use and I did not see the error message I did with the newer > firmware: > > kernel: Bluetooth: hci0: Hardware error 0x0c > > So this is already some improvement. What I can also try is to downgrade > the kernel from the HWE version (6.8) to the GA version (5.15) and see if > that helps. I'll try that later once I have a grip I know what I'm doing = :-) > > > > > On Sat, 19 Jul 2025 at 16:36, Tal Lichtenstein wrote: > >> I think this is not the same bug as 220341 - that bug reports the stack >> crashing and Bluetooth becoming disabled. This is not the case here - it >> just causes devices to disconnect periodically. I suspect the firmware is >> crashing and restarting but have no way to verify this. I will try howev= er >> to switch to some older firmware and see if this stops. Will report the >> results. >> >> On Sat, Jul 19, 2025, 15:06 wrote: >> >>> https://bugzilla.kernel.org/show_bug.cgi?id=3D220344 >>> >>> --- Comment #2 from Paul Menzel ( >>> pmenzel+bugzilla.kernel.org@molgen.mpg.de) --- >>> Was the Linux firmware updated on your system, so you actually need to >>> test an >>> *older* firmware version? >>> >>> -- >>> You may reply to this email to add a comment. >>> >>> You are receiving this mail because: >>> You reported the bug. >> >> --=20 You may reply to this email to add a comment. You are receiving this mail because: You are the assignee for the bug.=