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[83.28.84.35]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a868f299e4bsm546111366b.57.2024.08.25.08.15.41 (version=TLS1_2 cipher=AES128-SHA bits=128/128); Sun, 25 Aug 2024 08:15:42 -0700 (PDT) Date: Sun, 25 Aug 2024 17:15:37 +0200 From: =?UTF-8?B?TWljaGHFgg==?= Pecio To: fps Cc: Mathias Nyman , linux-usb@vger.kernel.org Subject: Re: Misbehaving Alder Lake-N PCH USB 3.2 xHCI Host Controller Message-ID: <20240825171537.33e49293@foxbook> In-Reply-To: <67D20520-0374-4461-B626-5142F1D7B743@gmx.net> References: <20240820130158.339b4d87@foxbook> <20240821150233.4f8f66ef@foxbook> <2b81ac60-32f5-4b71-98de-d336b7282cfb@gmx.net> <20240825065831.0eaba5b2@foxbook> <67D20520-0374-4461-B626-5142F1D7B743@gmx.net> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit What is the last digit of your HCSPARAMS2 register? Here's my three hosts, guess which is the one with problems. grep HCSPARAMS2 /sys/kernel/debug/usb/xhci/*/reg-cap /sys/kernel/debug/usb/xhci/0000:02:00.0/reg-cap:HCSPARAMS2 = 0xfc0000fa /sys/kernel/debug/usb/xhci/0000:03:00.0/reg-cap:HCSPARAMS2 = 0xfc000031 /sys/kernel/debug/usb/xhci/0000:04:00.0/reg-cap:HCSPARAMS2 = 0x00000011 See xHCI section 5.3.4. If IST is high, you are probably out of luck.