From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?ISO-8859-1?Q?Marius_Gr=F6ger?= Subject: Re: [PATCH 2/2] drm/radeon/kms: enable underscan option for digital connectors Date: Mon, 09 Aug 2010 09:38:02 +0200 Message-ID: <4C5FB05A.5060903@googlemail.com> References: <1280879960-2065-1-git-send-email-alexdeucher@gmail.com> <4C595C9C.60503@googlemail.com> <4C5EA035.9010703@googlemail.com> <4C5EF035.5080407@googlemail.com> <4C5FAE16.30402@googlemail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1"; Format="flowed" Content-Transfer-Encoding: quoted-printable Return-path: Received: from mail-bw0-f49.google.com (mail-bw0-f49.google.com [209.85.214.49]) by gabe.freedesktop.org (Postfix) with ESMTP id A79369E7A7 for ; Mon, 9 Aug 2010 00:38:04 -0700 (PDT) Received: by bwz19 with SMTP id 19so1400375bwz.36 for ; Mon, 09 Aug 2010 00:38:03 -0700 (PDT) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org Errors-To: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org To: Alex Deucher Cc: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org Am 09.08.2010 09:33, wrote Alex Deucher: > 2010/8/9 Marius Gr=F6ger: >> Am 08.08.2010 20:09, wrote Alex Deucher: >>> >>> 2010/8/8 Marius Gr=F6ger: >>>> >>>> Am 08.08.2010 18:22, wrote Alex Deucher: >>>>>> >>>>>> Also, I kind of was hoping that once I could use 1280x720 for both t= he >>>>>> console and the X screen, it would would allow me to switch between = the >>>>>> two >>>>>> transparently. Instead, the TV takes notice of the switch and needs >>>>>> some >>>>>> extra syncing time. Is this expected behaviour? >>>>> >>>>> You mean switching underscan off and on or a VT switch? The hw has to >>>>> reprogram the mode when it changes the underscan. As for a VT switch, >>>>> it should just be changing the crtc base, but IIRC there was a bug >>>>> where X and the console used slightly different modes in some cases. >>>> >>>> VT switch. I use video=3D1280x720@50 on the command line and select the >>>> corresponding EDID resolution within X. Is this bug still pending or is >>>> my >>>> scenario supposed to work? >>> >>> You may be seeing this issue: >>> http://lists.x.org/archives/xorg-devel/2010-August/011743.html >> >> "In the absence of the user specifying an overriding monitor >> configuration, trust the KMS drivers to have correctly probed the output >> modes." >> >> Well, in my case I *am* specifying an overriding monitor configuration. = Is >> there still a chance that video=3D1280x720@50 could be meaning s.th. dif= ferent >> then the corresponding mode in X that I explicitly choose. > > Can you verify that the console and X are using the same modeline? > The mode selected by video=3D1280x720@50 likely has different timing > than the timing used by the mode in X. Is the VT switch smooth when > you don't specify the mode on the console or X (i.e., let the driver > decide on it's own)? Ah ok, "likely has different timing" - this is probably the issue here. = I'll be investigating this. Is there a way to influence the timing used = by video=3D1280x720@50 to match the one used in X? Or should I try finding = out about the console timing and use that as an xorg.conf modeline? Regards Marius