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[83.28.83.227]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-393f5f3a614sm12131491fa.16.2026.05.09.08.31.22 (version=TLS1_2 cipher=AES128-SHA bits=128/128); Sat, 09 May 2026 08:31:24 -0700 (PDT) Date: Sat, 9 May 2026 17:31:20 +0200 From: Michal Pecio To: Gregkh Cc: c2mismo , Linux Usb Subject: Re: USB: Lexar E300 21c4:b083 fails SuperSpeedPlus negotiation due to missing BOS descriptor =?UTF-8?B?4oCU?= request for NO_BOS quirk Message-ID: <20260509173120.7c15ee19.michal.pecio@gmail.com> In-Reply-To: <2026050910-shopping-perceive-b23a@gregkh> References: <2026050910-shopping-perceive-b23a@gregkh> 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=UTF-8 Content-Transfer-Encoding: quoted-printable On Sat, 9 May 2026 06:07:19 +0200, Gregkh wrote: > On Fri, May 08, 2026 at 09:18:22PM +0200, c2mismo wrote: > >=20 > > Dear USB subsystem maintainers, > >=20 > > I have a Lexar E300 M.2 SSD enclosure (idVendor=3D0x21c4, > > idProduct=3D0xb083) that supports USB 3.2 Gen 2 (10 Gbps). Under > > Linux it always negotiates down to 5 Gbps, while on Windows the > > same hardware (cable, port) works correctly at 10 Gbps > > (CrystalDiskMark ~1087 MB/s vs ~450 MB/s on Linux). > >=20 > > The kernel log shows that the device initially attempts SuperSpeed > > Plus (Gen 2x1) but fails to provide a valid BOS descriptor, causing > > an error -71 and a forced fallback to SuperSpeed (5 Gbps): Where does it show that? =20 > > [=C2=A0 179.146227] usb 2-1: new SuperSpeed Plus Gen 2x1 USB device num= ber 4 using xhci_hcd > > [=C2=A0 182.237405] usb 2-1: USB disconnect, device number 4 > > [=C2=A0 182.420843] sd 12:0:0:0: [sda] Synchronize Cache(10) failed: Re= sult: hostbyte=3DDID_ERROR driverbyte=3DDRIVER_OK > > [=C2=A0 182.552343] usb usb2-port1: config error > > [=C2=A0 183.131966] usb 2-1: new SuperSpeed USB device number 5 using x= hci_hcd Users with confirmed BOS problems had different logs: https://bugzilla.kernel.org/show_bug.cgi?id=3D218943 https://bugzilla.kernel.org/show_bug.cgi?id=3D220027 > > i did try to add the following entry to drivers/usb/core/quirks.c > > in the usb_quirk_list[]: > >=20 > > { USB_DEVICE(0x21c4, 0xb083), .driver_info =3D USB_QUIRK_NO_BOS }, > >=20 > > I am running Arch Linux with kernel 7.0.3 (in the recent version > > does not contain the NO_BOS definition in its source), =20 >=20 > 7.0.3 has that quirk flag, so this should work. Well, maybe it's doesn't because it's a different issue? Regards, Michal