Bug#1143161: linux-image-6.12.96+deb13-amd64: X does not start on DisplayPort of NVIDIA Quadro 600 with nouveau

Path	csiph.com!weretis.net!feeder8.news.weretis.net!news.tcpreset.net!news.sonologic.net!news.corradoroberto.it!diesel.cu.mi.it!bofh.it!news.nic.it!robomod
From	Salvatore Bonaccorso <carnil@debian.org>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1143161: linux-image-6.12.96+deb13-amd64: X does not start on DisplayPort of NVIDIA Quadro 600 with nouveau
Date	Tue, 04 Aug 2026 07:30:01 +0200
Message-ID	<NofSV-8Qca-3@gated-at.bofh.it> (permalink)
References	<NmOi5-81uD-15@gated-at.bofh.it> <NmOi5-81uD-15@gated-at.bofh.it>
X-Original-To	Takashi Yano <takashi.yano@nifty.ne.jp>, 1143161@bugs.debian.org
X-Mailbox-Line	From debian-bugs-dist-request@lists.debian.org Tue Aug 4 05:23:08 2026
Old-Return-Path	<debbugs@buxtehude.debian.org>
X-Spam-Flag	NO
X-Spam-Score	-1.7
Reply-To	Salvatore Bonaccorso <carnil@debian.org>, 1143161@bugs.debian.org
Resent-To	debian-bugs-dist@lists.debian.org
Resent-Cc	debian-kernel@lists.debian.org
X-Debian-Pr-Message	followup 1143161
X-Debian-Pr-Package	src:linux
X-Debian-Pr-Keywords	patch
X-Debian-Pr-Source	linux
MIME-Version	1.0
Content-Type	text/plain; charset=us-ascii
Content-Disposition	inline
X-Debian-User	carnil
X-Debian-Message	from BTS
X-Mailing-List	<debian-bugs-dist@lists.debian.org> archive/latest/1983573
List-ID	<debian-bugs-dist.lists.debian.org>
List-URL	<https://lists.debian.org/debian-bugs-dist/>
Approved	robomod@news.nic.it
Lines	40
Organization	linux.* mail to news gateway
Sender	robomod@news.nic.it
X-Original-Date	Tue, 4 Aug 2026 07:21:36 +0200
X-Original-Message-ID	<anF24IbF-otY7hnH@eldamar.lan>
X-Original-References	<178547573138.1525.16706623360585844071.reportbug@debian-usb> <178547573138.1525.16706623360585844071.reportbug@debian-usb>
Xref	csiph.com linux.debian.bugs.dist:1303870 linux.debian.kernel:93580

Cross-posted to 2 groups.

Show key headers only | View raw

Control: tags -1 + moreinfo

On Fri, Jul 31, 2026 at 02:28:51PM +0900, Takashi Yano wrote:
> Package: src:linux
> Version: 6.12.96-1
> Severity: normal
> Tags: patch
> X-Debbugs-Cc: debian-amd64@lists.debian.org
> User: debian-amd64@lists.debian.org
> Usertags: amd64
> 
> Dear Maintainer,
> 
>    * What led up to the situation?
>      When starting X on NVIDIA Quadro 600 DisplayPort, X does not start correctly
>      and does not show screen. I am using nouveau. This also happen with
>        Quadro 600 / 2000 / 4000
>        Quadro FX 1800
>      The issue does not happen if DVI output is used.
> 
>    * What exactly did you do (or not do) that was effective (or
>      ineffective)?
>      Using another mother board does not help.
>      After some effort, I found that the attached patch resolves the issue.
>      This essentially reverts a5a7379f6d9d ("drm/nouveau/kms/nv50-: split DP
>      disable+enable into two modesets") and adds a workaround for Quadro FX
>      1800.
> 
>    * What was the outcome of this action?
>      Without the patch, X does not start correctly, while it starts correctly
>      with the patch.
> 
>    * What outcome did you expect instead?
>      X starts correctly and the screen is shown up.

Can you please report the problem directly upstream and report here so
we can update the metadata?

Regards,
Salvatore

Back to linux.debian.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

Bug#1143161: linux-image-6.12.96+deb13-amd64: X does not start on DisplayPort of NVIDIA Quadro 600 with nouveau Salvatore Bonaccorso <carnil@debian.org> - 2026-08-04 07:30 +0200
  Processed: Re: Bug#1143161: linux-image-6.12.96+deb13-amd64: X  does not start on DisplayPort of NVIDIA Quadro 600 with nouveau "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-08-04 07:30 +0200
  Bug#1143161: linux-image-6.12.96+deb13-amd64: X does not start on DisplayPort of NVIDIA Quadro 600 with nouveau Takashi Yano <takashi.yano@nifty.ne.jp> - 2026-08-08 08:30 +0200
    Bug#1143161: linux-image-6.12.96+deb13-amd64: X does not start on DisplayPort of NVIDIA Quadro 600 with nouveau Salvatore Bonaccorso <carnil@debian.org> - 2026-08-17 21:20 +0200
      Bug#1143161: linux-image-6.12.96+deb13-amd64: X does not start on DisplayPort of NVIDIA Quadro 600 with nouveau Takashi Yano <takashi.yano@nifty.ne.jp> - 2026-08-19 02:10 +0200

csiph-web