From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Nikita N." Subject: Re: bug Date: Tue, 31 Mar 2015 01:56:01 -0700 Message-ID: <1427792161.2150884.247436393.3D8D2571@webmail.messagingengine.com> References: <1427551386.3092172.246393281.691C33A7@webmail.messagingengine.com> <5518F8F3.10304@ladisch.de> <1427711234.231499.246955417.6E2E7C65@webmail.messagingengine.com> <55192FBC.1070307@ladisch.de> <1427726222.1872206.247049189.3E3BB0F7@webmail.messagingengine.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Return-path: Received: from out2-smtp.messagingengine.com (out2-smtp.messagingengine.com [66.111.4.26]) by alsa0.perex.cz (Postfix) with ESMTP id 00996260621 for ; Tue, 31 Mar 2015 10:56:02 +0200 (CEST) Received: from compute5.internal (compute5.nyi.internal [10.202.2.45]) by mailout.nyi.internal (Postfix) with ESMTP id 8CCE9206B3 for ; Tue, 31 Mar 2015 04:55:58 -0400 (EDT) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: Ricard Wanderlof Cc: "alsa-devel@alsa-project.org" , Clemens Ladisch List-Id: alsa-devel@alsa-project.org > First of all, I can't say I'm representing the ALSA project or anyone els= e = > in this matter, so the following is just my personal opinion. As we already wrote, we are not blaming you or ALSA. > particular mixer application such as alsamixergui, but should be able to = > happen with any mixer application, given the appropriate settings. That is indeed what we are afraid, if anybody will have the brilliant idea to reverse engineer that tool to a more damaging level in a virus/malware , and make its effect unstoppable. = > Secondly, if you believe that alsamixergui specifically is missbehaving, = > why don't you just take it out of your distribution (dCore)? as we wrote, we are going to do this. > Given the proliferation of cheap PC hardware this is not surprising as you say, given the proliferation of cheap PC hardware, a proliferation of such virus/malware could upset not only our users. > it is hardly a software problem. I personally don't agree with that. As we wrote, not everybody is omniscient, I personally was not aware of this issue, before was pointed out. Without warnings, even a Teddy Bear can be dangerous. > alsamixergui is not created by the ALSA = > project, so this mailing list is the wrong place to look if none other = > than for that particular reason. Sure, we would be very grateful if you could point that out, so we can contact the individual who programmed this tool Unless it's not a secret or there is smtng to hide. = -- = Nikita N. nikitan@operamail.com On Tue, Mar 31, 2015, at 01:24 AM, Ricard Wanderlof wrote: > = > On Mon, 30 Mar 2015, Nikita N. wrote: > = > > We are the devs involved in dCore porting, and that is one of our users > > report: > > http://forum.tinycorelinux.net/index.php/topic,18225 > > = > > We verified that in few of our legacy laptops. > > It didn't reproduce for every laptop, but indeed in a couple of them, > > the temperature of the speakers reached extremes levels in few seconds, > > only unplugging the AC/DC cable saved them. > > This is a serious problem in our opinion, and we would hate to see our > > dCore reputation spoiled. > > We hate to admit, but it is *NOT* our bug, and would hate to see this > > bug reverse engineered into a virus/malware (on Linux, or other OS) and > > see ourselves blamed for it. > > So we would like to keep the incident quiet, and we are going to remove > > that thread from our forum. > > On the other side, we would expect any action from ALSA project in > > removing that tool and/or exposing the real individual/s guilty of > > writing that tool. > = > First of all, I can't say I'm representing the ALSA project or anyone > else = > in this matter, so the following is just my personal opinion. Furthermore = > I have no real experience with the mixer application under discussion = > (alsamixergui), but on the face of it it just looks like any mixer = > application. > = > From the thread linked above, it seems that if someone maxes out all = > controls in the mixer, this results in a high-pitched whine in the = > speakers, which on certain laptops seem to cause the destruction of = > something in the machine (likely the speakers themselves). It is further = > speculated in the thread that what might be happening is acoustic > feedback = > from the speakers to the microphone, which would make sense given the = > results, but would seem strange from a system design point of view. > = > First of all, it would seem that this wouldn't be dependent on a = > particular mixer application such as alsamixergui, but should be able to = > happen with any mixer application, given the appropriate settings. > = > Secondly, if you believe that alsamixergui specifically is missbehaving, = > why don't you just take it out of your distribution (dCore)? > = > Thirdly, and perhaps most importantly, this seems to be a hardware = > problem. If the drive capability of the laptops's output stage is too > much = > for the speakers, then there is a serious design flaw in the hardware. = > Given the proliferation of cheap PC hardware this is not surprising, but = > it is hardly a software problem. > = > And finally, as Clemens said, alsamixergui is not created by the ALSA = > project, so this mailing list is the wrong place to look if none other = > than for that particular reason. > = > /Ricard > -- = > Ricard Wolf Wanderl=F6f ricardw(at)axis.com > Axis Communications AB, Lund, Sweden www.axis.com > Phone +46 46 272 2016 Fax +46 46 13 61 30 -- = http://www.fastmail.com - Or how I learned to stop worrying and love email again