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[79.185.228.110]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-5550b2d9b0asm1357367e87.214.2025.06.30.03.33.01 (version=TLS1_2 cipher=AES128-SHA bits=128/128); Mon, 30 Jun 2025 03:33:01 -0700 (PDT) Date: Mon, 30 Jun 2025 12:32:57 +0200 From: =?UTF-8?B?TWljaGHFgg==?= Pecio To: VladTop46 Cc: jikos@kernel.org, bentiss@kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [REGRESSION] USB HID initialization delay (~8s) for Semitek keyboard on kernel 6.15.* Message-ID: <20250630123257.3bcfa86b@foxbook> In-Reply-To: References: 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 On Fri, 13 Jun 2025 00:09:31 +0900, VladTop46 wrote: > Hi Jiri and Benjamin, > > I'm reporting a regression in USB HID initialization timing for the > Skyloong GK104 Pro keyboard (detected as "Semitek Gaming Keyboard", USB > ID: 1ea7:0907), which I observed when upgrading from Linux kernel 6.14 > to 6.15. > > Summary: > On kernel 6.15.2, the keyboard takes approximately 8 seconds longer to > become initialized and usable compared to 6.12.33-lts. The USB device is > discovered at the same time, but HID input registration is significantly > delayed. After that, the device functions normally. > > Hardware: > > - Device: Skyloong GK104 Pro (detected as "Semitek Gaming Keyboard", USB > ID: 1ea7:0907) > - Motherboard: ASUS ROG STRIX B550-A GAMING > - CPU: AMD Ryzen 9 5900X > - Distro: Arch Linux No progress on that? I think git-bisect is your best bet, then. Is this by any chance unique to USB ports on AMD desktop motherboards? Their chipsets are particularly slow to perform USB control transfers, so that could be a factor. Regards, Michal