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Wed, 29 Jan 2025 10:31:16 -0800 (PST) From: John Glotzer To: rtl8821cerfe2@gmail.com Cc: Aaron.Hou@mediatek.com, Chris.Lu@mediatek.com, Deren.Wu@mediatek.com, Hao.Qin@mediatek.com, Sean.Wang@mediatek.com, jglotzer@gmail.com, johan.hedberg@gmail.com, linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, luiz.dentz@gmail.com, marc.payne@mdpsys.co.uk, marcel@holtmann.org, regressions@lists.linux.dev, sergio.callegari@unibo.it, steve.lee@mediatek.com, tiwai@suse.de Subject: Re: [PATCH] Bluetooth: btmtk: Remove resetting mt7921 before downloading the fw Date: Wed, 29 Jan 2025 12:31:09 -0600 Message-ID: <20250129183109.10770-1-jglotzer@gmail.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <585f1075-a662-489b-bd5c-cf9f24291804@gmail.com> References: <585f1075-a662-489b-bd5c-cf9f24291804@gmail.com> Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Good news/TLDR Yes, so far I have resumed from sleep 2x without any issues with both of my workarounds disabled (kernel command line/systemd rfkill on sleep). What I don't yet understand This commit (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/diff/drivers/bluetooth/btusb.c?id=v6.12.8&id2=v6.12.7) was a pure USB fix. My mt7922 device (not a USB dongle but built into the motherboard) seems to be both a bluetooth device (bound to btusb driver) *and* a Wifi device (bound to mt7921e driver). I remain puzzled as to how is it that the issue that is on the USB side was *also* fixed by adding mt7921e.disable_aspm=y to the kernel command line (since that would act on the wifi/pci pathway)?