From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D8C4C13211A for ; Thu, 30 May 2024 12:49:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717073361; cv=none; b=WUVLv+YzDr53KrqCUOtt7P0lqPIbtKiPeqRGCezqhoJUSEf74gqSTfB/2o1AXzPLiH30rYkqZqi4WfayAtudeDGhsAWKUzAE7yf4FlfzzCLwBBZoFBt50fXSsvNeJxA1Pd9krFYuEVL2boiGi1G4M4wWqdJrXApy8Nva27R7ciY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717073361; c=relaxed/simple; bh=5yE7trWS8reGdfxOu8pyMz5ttB1ullpyn+oJDrP7y3s=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=EpIIU5Mqg9SCs39zuQPBWlOS6NCKBBs5ODzZUYCrz49vbv4RovQ7ZL4c7jMyu+4LhFkLQKGcasOE0JZkN1jQXxzcl2C/C6oIoarjk/JJvUJzU/ceGApxVvhLG06sBh4znZdYkQWYAFYNtICSeuaFXM1KOmQt/7cW803Zb5U1yYQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=dfoUomfY; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="dfoUomfY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 133CFC2BBFC; Thu, 30 May 2024 12:49:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1717073361; bh=5yE7trWS8reGdfxOu8pyMz5ttB1ullpyn+oJDrP7y3s=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=dfoUomfY8YaI7bRBL/INqT7HZtEkbXxpxJ4MLb13tXcI6hhKa/XU6JGCs4ja0d+ni lWgZKcebZCZgv1HeRE5J/PVClysymjvvIGbYDyfdB6V5AHbJ7x41T1UBwDugRKgZRT lPaM37U3nollAnqzxXHOPx8wFIByXqSrdlNDJ9uA= Date: Thu, 30 May 2024 14:49:26 +0200 From: Greg KH To: Mohammad Hosain Cc: "stable@vger.kernel.org" Subject: Re: AM5 big performance reduction with CSM boot mode and Wi-Fi disabled. Message-ID: <2024053032-squeeze-such-dd29@gregkh> References: <321337111.6017022.1717061838476.ref@mail.yahoo.com> <321337111.6017022.1717061838476@mail.yahoo.com> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <321337111.6017022.1717061838476@mail.yahoo.com> On Thu, May 30, 2024 at 09:37:18AM +0000, Mohammad Hosain wrote: > Hello > There is a big performance bug (only affecting games performance) on Linux (not reproducible on Windows) with AM5 boards (at least for my MSI MAG b650 Tomahawk) if these BIOS settings are used: > CSM -> Enabled > Wi-Fi -> Disabled (or set to Bluetooth only) > This does not happen even on Win 7... (I've only tested DX12 games) and does not happen if UEFI mode is chosen. I've tested with many different BIOS versions all showing the same result. > I have tried troubleshooting with MSI with some benchmarks posted (https://forum-en.msi.com/index.php?threads/b650-tomahawk-bios-bug-disabling-wi-fi-massively-reduces-system-performance.396910/) and after a week we realized this only happens on Linux (tested on Arch/Fedora/Ubuntu with 6.8 and 6.9 kernels for the first two). Is this a regression? If so, what kernel version worked? What did not work? Can you use 'git bisect' to find the problem? And if it a regression, please report it to the regression list AND the developers for the subsystem involved. If it isn't a regression, perhaps it never has worked? thanks, greg k-h