From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nick Bowler Subject: Re: Linux 3.4-rc4 Date: Sat, 28 Apr 2012 11:33:50 -0400 Message-ID: <20120428153350.GA19561@elliptictech.com> References: <20120422164023.GA32342@elliptictech.com> <20120423000554.GA893@elliptictech.com> <20120423024558.GD13840@phenom.dumpdata.com> <20120424010345.GA30674@elliptictech.com> <20120425013537.GA11959@elliptictech.com> <1335322574.1821.8.camel@nisroch> <1335504021.5311.0.camel@nisroch> <20120428003928.GA16805@elliptictech.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Return-path: Received: from ironport-01.sms.scalar.ca (mx.scalarmail.ca [98.158.95.75]) by gabe.freedesktop.org (Postfix) with ESMTP id 232099E74C for ; Sat, 28 Apr 2012 08:33:56 -0700 (PDT) Content-Disposition: inline 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: Linus Torvalds , Martin Peres , Linux Kernel Mailing List , dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org On 2012-04-28 02:19 -0400, Alex Deucher wrote: > On Fri, Apr 27, 2012 at 8:39 PM, Nick Bowler w= rote: > > Hi Ben, > > > > On 2012-04-27 15:20 +1000, Ben Skeggs wrote: > >> Does this patch help you at all? > >> > >> http://cgit.freedesktop.org/nouveau/linux-2.6/commit/?id=3Da3a285f1786= 7f0018de798b5ee85731ec1268305 > > > > Yes. =A0I cherry-picked this patch on top of Linus' master (3.4-rc4+) a= nd > > this appears to solve the "black screen on VGA" problem described in the > > original report. =A0Thanks! > > > > Unfortunately, that's not the end of my VGA-related regressions. :( > > > > While tracking down the black screen issue, I've been having the monitor > > directly connected to the video card the whole time, but now when I'm > > connected through my KVM switch (an IOGear GCS1804), it appears that > > something's going wrong with reading the EDID, because the available > > modes are all screwed up (both console and X decide they want to drive > > the display at 1024x768). =A0Here's the output of xrandr on 3.2.15: > > > > =A0% xrandr > > =A0Screen 1: minimum 320 x 200, current 1600 x 1200, maximum 4096 x 4096 > > =A0VGA-1 connected 1600x1200+0+0 (normal left inverted right x axis y a= xis) 352mm x 264mm > > =A0 =A0 1600x1200 =A0 =A0 =A075.0*+ =A0 70.0 =A0 =A0 65.0 =A0 =A0 60.0 > > =A0 =A0 1280x1024 =A0 =A0 =A085.0 + =A0 75.0 =A0 =A0 60.0 > > =A0 =A0 1920x1440 =A0 =A0 =A060.0 > > =A0 =A0 1856x1392 =A0 =A0 =A060.0 > > =A0 =A0 1792x1344 =A0 =A0 =A060.0 > > =A0 =A0 1920x1200 =A0 =A0 =A074.9 =A0 =A0 59.9 > > =A0 =A0 1680x1050 =A0 =A0 =A084.9 =A0 =A0 74.9 =A0 =A0 60.0 > > =A0 =A0 1400x1050 =A0 =A0 =A085.0 =A0 =A0 74.9 =A0 =A0 60.0 > > =A0 =A0 1440x900 =A0 =A0 =A0 84.8 =A0 =A0 75.0 =A0 =A0 59.9 > > =A0 =A0 1280x960 =A0 =A0 =A0 85.0 =A0 =A0 60.0 > > =A0 =A0 1360x768 =A0 =A0 =A0 60.0 > > =A0 =A0 1280x800 =A0 =A0 =A0 84.9 =A0 =A0 74.9 =A0 =A0 59.8 > > =A0 =A0 1152x864 =A0 =A0 =A0 75.0 > > =A0 =A0 1280x768 =A0 =A0 =A0 84.8 =A0 =A0 74.9 =A0 =A0 59.9 > > =A0 =A0 1024x768 =A0 =A0 =A0 85.0 =A0 =A0 75.1 =A0 =A0 75.0 =A0 =A0 70.= 1 =A0 =A0 60.0 =A0 =A0 43.5 =A0 =A0 43.5 > > =A0 =A0 832x624 =A0 =A0 =A0 =A074.6 > > =A0 =A0 800x600 =A0 =A0 =A0 =A085.1 =A0 =A0 72.2 =A0 =A0 75.0 =A0 =A0 6= 0.3 =A0 =A0 56.2 > > =A0 =A0 848x480 =A0 =A0 =A0 =A060.0 > > =A0 =A0 640x480 =A0 =A0 =A0 =A085.0 =A0 =A0 75.0 =A0 =A0 72.8 =A0 =A0 7= 2.8 =A0 =A0 66.7 =A0 =A0 60.0 =A0 =A0 59.9 > > =A0 =A0 720x400 =A0 =A0 =A0 =A085.0 =A0 =A0 87.8 =A0 =A0 70.1 > > =A0 =A0 640x400 =A0 =A0 =A0 =A085.1 > > =A0 =A0 640x350 =A0 =A0 =A0 =A085.1 > > =A0 =A0 320x200 =A0 =A0 =A0 165.1 > > > > And on 3.4-rc4+ (with your patch cherry-picked): > > > > =A0% xrandr > > =A0Screen 1: minimum 320 x 200, current 1024 x 768, maximum 4096 x 4096 > > =A0VGA-1 connected 1024x768+0+0 (normal left inverted right x axis y ax= is) 0mm x 0mm > > =A0 =A0 1024x768 =A0 =A0 =A0 60.0* > > =A0 =A0 800x600 =A0 =A0 =A0 =A060.3 =A0 =A0 56.2 > > =A0 =A0 848x480 =A0 =A0 =A0 =A060.0 > > =A0 =A0 640x480 =A0 =A0 =A0 =A059.9 > > =A0 =A0 320x200 =A0 =A0 =A0 165.1 > > > > Running xrandr on 3.4-rc4+ also causes the screen to go black for a > > second when it does not on 3.2.15. =A0It also causes several messages of > > the form > > > > =A0[drm] nouveau 0000:01:00.0: Load detected on output B > > > > to be logged. =A0Also, looking at /sys/class/drm/card0-VGA-1/edid I see > > that it is empty on 3.4-rc4+ and it is correct on 3.2.15. =A0Things seem > > to work OK when the KVM is not involved. > = > Were you ever able to fetch a EDID with the KVM involved? KVMs are > notorious for not connecting the ddc pins. Yes, it works on 3.2.15 as described above. Cheers, -- = Nick Bowler, Elliptic Technologies (http://www.elliptictech.com/)