[Bug 58021] New: [BISECTED] nouveau, nv50: External VGA not detected anymore

[Bug 58021] New: [BISECTED] nouveau, nv50: External VGA not detected anymore

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=58021

           Summary: [BISECTED] nouveau, nv50: External VGA not detected
                    anymore
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.7.0-rc4+ - 3.9
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
        AssignedTo: drivers_video-dri@kernel-bugs.osdl.org
        ReportedBy: wippbox@gmx.net
        Regression: No


Created an attachment (id=101211)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=101211)
dmesg for last good commit

I have a lenove thinkpad T61p with a NVIDIA Corporation G84GLM [Quadro FX
570M].
When connecting my external VGA monitor my monitor is no more detected
properly:
> cat /sys/class/drm/card0-VGA-1/status
gives now "disconnected"

Last good commit is
ef22c8bb7b3fac45919b7fde412d36d1a8367d51
drm/nv50/disp: call into core to handle dac/sor power state changes

First bad commit is
7ebb38b556485449bfaa506a196439f6a6fd6ebd
drm/nv50/disp: call into core for dac load detection

The responsible function is
nv50_dac_detect in drivers/gpu/drm/nouveau/nv50_dac.c (moved to
drivers/gpu/drm/nouveau/nv50_display.c in more recent kernels).

Also tried a 3.9.1 kernel. The problem still remains.

However, replacing nv50_dac_detect with the corresponding version from the last
good commit fixed the problem (tried a 3.8.10 kernel).

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[Bug 58021] [BISECTED] nouveau, nv50: External VGA not detected anymore

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=58021





--- Comment #1 from wippbox@gmx.net  2013-05-12 09:26:26 ---
Created an attachment (id=101221)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=101221)
dmesg for first bad commit

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[Bug 58021] [BISECTED] nouveau, nv50: External VGA not detected anymore

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=58021


wippbox@gmx.net changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Platform|All                         |i386




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[Bug 58021] [BISECTED] nouveau, nv50: External VGA not detected anymore

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=58021


Per Arnold Blåsmo <per.arnold@blaasmo.no> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |per.arnold@blaasmo.no




--- Comment #2 from Per Arnold Blåsmo <per.arnold@blaasmo.no>  2013-05-29 13:15:11 ---
I seem to have much of the same problem.
I am running a Dell desktop with  NVIDA Quadro NVS 295 graphic card and two
identical Dell monitors attache via DisplayPort.

I run Fedora 18 with all latest updates and using Nouveau drivers.

Starting with Kernel 3.8.11 it boots OK and both monitors works as expected.
Starting with Kernel 3.9.2, 3.9.3 or 3.9.4 boots and when trying to display
anything on monitor two it gets into problems.

It boots until its tries to start the Xorg server and then monitor 2 starts
flickering on and off. Monitor 1 stays with the boot logo of fedora.

Also during boot when booting I only have the boot logo of fedora on monitor 1
when running kernel 3.9.x while I have it on both screens when running kernel
3.8.11

I am able to hit CTRL+f2 to get a text login.

I will attache my dmesg output for both kernels.

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[Bug 58021] [BISECTED] nouveau, nv50: External VGA not detected anymore

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=58021





--- Comment #3 from Per Arnold Blåsmo <per.arnold@blaasmo.no>  2013-05-29 13:26:24 ---
Created an attachment (id=102831)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=102831)
Dmesg using kernel 3.8.11

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[Bug 58021] [BISECTED] nouveau, nv50: External VGA not detected anymore

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=58021





--- Comment #4 from Per Arnold Blåsmo <per.arnold@blaasmo.no>  2013-05-29 13:27:03 ---
Created an attachment (id=102841)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=102841)
Dmesg using kernel 3.9.4 (bad)

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[Bug 58021] [BISECTED] nouveau, nv50: External VGA not detected anymore

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=58021





--- Comment #5 from wippbox@gmx.net  2013-05-29 14:50:19 ---
I don't that this is related to this bug. Here the monitor stays blank as soon
as the nouveau driver is loaded.

For more info:
https://bugs.freedesktop.org/show_bug.cgi?id=64904

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[Bug 58021] [BISECTED] nouveau, nv50: External VGA not detected anymore

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=58021


wippbox@gmx.net changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |CODE_FIX




--- Comment #6 from wippbox@gmx.net  2013-06-20 07:40:23 ---
Solved in https://bugs.freedesktop.org/show_bug.cgi?id=64904

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