From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nigel Cunningham Subject: Re: [PATCH 2/2] Fix console handling during suspend/resume Date: Wed, 14 Jun 2006 10:00:08 +1000 Message-ID: <200606141000.12260.ncunningham@linuxmail.org> References: <200606131620.45156.david-b@pacbell.net> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1644556358==" Return-path: In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-pm-bounces@lists.osdl.org Errors-To: linux-pm-bounces@lists.osdl.org To: linux-pm@lists.osdl.org Cc: David Brownell , Linus Torvalds List-Id: linux-pm@vger.kernel.org --===============1644556358== Content-Type: multipart/signed; boundary="nextPart4465914.geYYjfuI4C"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit --nextPart4465914.geYYjfuI4C Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Hi. On Wednesday 14 June 2006 09:46, Linus Torvalds wrote: > On Tue, 13 Jun 2006, David Brownell wrote: > > Here's a related patch (well, "hack") I found helpful ... specifically = to > > help let _serial_ consoles be more useful. > > I just checked. > > I think exactly _two_ of the six machines I have around my desk have > serial ports, and of those two, one is permanently turned off because it's > old, noisy, and just not interesting. > > Maybe I'm more progressive than most, but I personally consider serial > lines pretty much dead. Usb to serial converters are not completely unheard of, though. My old=20 omnibook even came with one. It's the one bit I still use :) > > Although I must say I like Nigel's "BDI-2000 per developer" hack better. > > Even though not all boxes can hook up to a JTAG module. :( > > Umm. Even more importantly, I don't think the JTAG interfaces for PC's are > necessarily even available. There is read-out logic for ARM's and embedded > PPC, but have you ever seen anything for something non-embedded? Yeah. Sort of kills that idea, doesn't it? > A really useful trick the PPC people use was to put the firewire > controller into "anybody can read" mode, and use it as a kernel debugger > when it basically becomes a remote memory DMA engine. I used that to debug > some kernel hangs, and it was very nice. > > However, that won't survive a power event, so it might be useful to debug > suspend problems, but generally not resume problems. Since just about every problem occurs at resume time, it really does seem t= o=20 me to be the case that we have to use the rtc. Great idea, by the way. Regards, Nigel =2D-=20 Nigel, Michelle and Alisdair Cunningham 5 Mitchell Street Cobden 3266 Victoria, Australia --nextPart4465914.geYYjfuI4C Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) iD8DBQBEj1GMN0y+n1M3mo0RAo/UAJ49XhxkbdppywkQL1QrsDAxIc5cUACfcEDD bHz1Z9bx8E+B/NT1E3tdyNw= =OPDA -----END PGP SIGNATURE----- --nextPart4465914.geYYjfuI4C-- --===============1644556358== Content-Type: text/plain; charset="iso-8859-1" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline --===============1644556358==--