From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr1-f51.google.com (mail-wr1-f51.google.com [209.85.221.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7F8E71EF091 for ; Mon, 2 Feb 2026 15:48:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.51 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770047339; cv=none; b=afzBRE+U1z/u04zXk7sM7kTmlU8adG8zuRUVMQdBISulak3gX4Yi+s9rEo8EoAUMGQUt5hk9GEFHNOdPBoiS9gO1bcJocbp8kZe3l/NyOdQuIOaAOaUCSRZlHNDDjb19tb0Jxx0DIryq1+UVVnXY+beNnrKRr53sfmPTh69T3OI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770047339; c=relaxed/simple; bh=OAbXJdhCDBHhq7qKk57tzyoxjIGL5E1A/S3oMEGUmmM=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=XKHxdzqS+GgQwGS1+JCAc+D3UJcDiO7lGVOIU4JSdiQdpA1NsWUwYA63a5E1HjacitqVYW2W+sUJYR3aYB69CX9pH2v/YMJAKP67XG4TXixlpimM5nVfL8HILZoTgigCYoRwW+fXOqXRamfausPtnRgt8GmMaXZnFHOcmqt4+sY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=suse.com; spf=pass smtp.mailfrom=suse.com; dkim=pass (2048-bit key) header.d=suse.com header.i=@suse.com header.b=R7r5PWag; arc=none smtp.client-ip=209.85.221.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=suse.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=suse.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=suse.com header.i=@suse.com header.b="R7r5PWag" Received: by mail-wr1-f51.google.com with SMTP id ffacd0b85a97d-430f3ef2d37so4005919f8f.3 for ; Mon, 02 Feb 2026 07:48:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=google; t=1770047336; x=1770652136; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=TT0/khnC8UevM+sztHZVeOrmJNAebfgO8MLsm9xz5uM=; b=R7r5PWagO3pEE/Dm/M+jZ9C9Xnmzvi8pVMnqSOjWHhUkdPqKQnkGsu/KZgaeS70Wwa VPFTiQS/HMvdxpx5oyN+5IKLfrGrkLoYZtXe/mNGGl88eje4wUoUI5FB4cIVT0it5JTn PdNtfkeFnMPXTymmurC4i2mYQn9vEwns2DTToFiT0Yy3KAvixwVUWNrQJe+JD3Vvd5XA neVfx7pz2gUZNHXZ86Odf7CpDgseEVk1fmp96xrn8W7oDtudYP3T+Z8Dlj21a7L0cllm qRduEKg3PL+6MdyKakyPfQaAQFWdfRF2Z6uu/ePr+T0vMU+19hKo3fLn6H6yZEl80jwa tOJg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1770047336; x=1770652136; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-gg:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=TT0/khnC8UevM+sztHZVeOrmJNAebfgO8MLsm9xz5uM=; b=KUpgyaUTDbe1cqwoSv6sjvDh4uf1cKfAS92HaZGvxc2sGGbN9MN3XJkK+PoIKvtmHX aP2eMRefOBDERtJKcw5QBKtfLaG7rc9I8F3DHUhbgkaOs00QUvy++F84ZRdR3fEBzaO6 K+nDj30PmkTMLyfDOffFVsLkL80RaEnIc3oWsx1FLJJCo6qZTGguNngs78IsPeS0lup1 u6V5ujmsdVoNthbxyX3QfKOJZ9suGWFyJKhmkqdkjKX99oUslAgYjd3iMWofY1z4IbAR A+aHCt6VjclCHXzHd1yG/31tXIaEezbitZjPw/vX5wSXaAtcdShdZvdF3uZwGoYiiDiN fWzg== X-Forwarded-Encrypted: i=1; AJvYcCX/oBK8o7GjY15tZUecvUFeC1K7bWg682NNo2JTv8KCRDSxZjZgiyKO6egbJ5aryIMWzIvAKXxO3cqEOO0=@vger.kernel.org X-Gm-Message-State: AOJu0Ywcr05LcAc7Byl+8DfC4oFXhTPhVEp61EyQR9GDg2C+6cmGGiyg J2pPj5VNhwz/Hw9QFsQto7eSJsYOJ+p6k8v9Ua0dJmjEf8jvC3NQD4/HxUj9cbeknqw= X-Gm-Gg: AZuq6aLffe3wuE11Dr1BfEz1qQPQwG/GKV63v6G/8pi+Y0/ZL6VjwfFtE676uBU5X+e /pXWyzVwKamq1tOyABiH2/oWdXukygD3Gyp/mBfCpDtZwbQqafriNDZCklp5Vf3K+w7/YfrlMfU bmLq9xEZvtGCeWRkMGipsNTuM3GHIbzV1iDFarPlB7rtEhouhD0b9KXuW6nvW7pzl9dYtK3GOq3 qAkM2jumDoMTrZM+d1P3vUBarlhE1nf7VfTCfU0AlFPwNbVbTMLFSSm2ZPFYitqpc5MnfjgzXfR g/MvglN+nRiUQhdJoMxo7WJ6Zn7TEM/U6sU4HJKJW6cz1xYSNq3ZJpwshV3LjisvzyGF+NiYJfj yrjfd5Wws6BABC00anG4sh+s0+yimAQCSEWnpwv7YQEqZCtHwd/s7CWAkw/KiOljH6dH17fLxjO EDOnLRdAcPe+ncUXfwQudhher/vg939OENZNrxZVmjOiCMuGmo86lQjOskWbFREJ33Nw== X-Received: by 2002:a05:6000:26c6:b0:430:fcda:452d with SMTP id ffacd0b85a97d-435f3a72b46mr16660252f8f.22.1770047335878; Mon, 02 Feb 2026 07:48:55 -0800 (PST) Received: from ?IPV6:2001:a61:133f:5501:1fa6:d8e8:bd82:1a4c? ([2001:a61:133f:5501:1fa6:d8e8:bd82:1a4c]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-435e10edfccsm43041412f8f.17.2026.02.02.07.48.55 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 02 Feb 2026 07:48:55 -0800 (PST) Message-ID: <1c317994-2932-4e2e-8e80-1c90606e63c9@suse.com> Date: Mon, 2 Feb 2026 16:48:49 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: usbhid: Intermittent EPROTO errors trigger USB reset and interrupt user input To: Alan Stern , Liam Mitchell Cc: Jiri Kosina , Benjamin Tissoires , linux-usb@vger.kernel.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org References: <1ebf9d19-7293-4902-857b-164fd4d21f25@rowland.harvard.edu> Content-Language: en-US From: Oliver Neukum In-Reply-To: <1ebf9d19-7293-4902-857b-164fd4d21f25@rowland.harvard.edu> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 01.02.26 21:40, Alan Stern wrote: > On Sun, Feb 01, 2026 at 06:57:06PM +0100, Liam Mitchell wrote: >> Hi, >> >> I'm trying to understand and fix intermittent keyboard/trackpad issues >> on my 2013 MacBook Pro running Linux v6.18.4: >> - missed/repeated/sticky keys while typing (this thread) Alan, this raises a question. What happens to KEY_UP events generated in between the last EPROTO and the reset? It seems to me like we need to assume that a reset implies that all keys have been released. Regards Oliver