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Thu, 30 May 2024 17:29:35 +0000 Date: Thu, 30 May 2024 16:59:12 +0000 (UTC) From: Mohammad Hosain To: Greg KH Cc: "stable@vger.kernel.org" Message-ID: <1591472096.6190967.1717088352009@mail.yahoo.com> In-Reply-To: <2024053032-squeeze-such-dd29@gregkh> References: <321337111.6017022.1717061838476.ref@mail.yahoo.com> <321337111.6017022.1717061838476@mail.yahoo.com> <2024053032-squeeze-such-dd29@gregkh> Subject: Re: AM5 big performance reduction with CSM boot mode and Wi-Fi disabled. Precedence: bulk X-Mailing-List: stable@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 X-Mailer: WebService/1.1.22356 YMailNorrin I think it has never worked (I remember as back as 6.7 it behaved like this= but only recently I discovered it). If you enable CSM and disable Wi-Fi us= ing BIOS, gaming performance is massively reduced on AM5 boards... This onl= y happens on Linux. I don't know who are the developers involved that is why I emailed stable@v= ger.kernel.org. Thank you. On Thursday, May 30, 2024 at 04:19:22 PM GMT+3:30, Greg KH wrote:=20 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 Linu= x (not reproducible on Windows) with AM5 boards (at least for my MSI MAG b6= 50 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 d= oes 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?=C2=A0 If so, what kernel version worked?=C2=A0 What d= id not work?=C2=A0 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