Nouveau - Jan 2009 - [Bug 19620] New: At first start of X, secondary display doesn' t come up properly.

http://bugs.freedesktop.org/show_bug.cgi?id=19620

           Summary: At first start of X, secondary display doesn't come up
                    properly.
           Product: xorg
           Version: git
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: mjulien.m at gmail.com
         QAContact: xorg-team at lists.x.org


Created an attachment (id=22036)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=22036)
Config

Problem :

first start of X : primary screen work fine, secondary screen stay blue
(mandriva make root X window blue instead of grey by default). 
The screen seems to be properly configured (1024x768 at 85) and I can drag
something on this screen (but obviously I don't see it anymore)
If I try this in clone mode, the second screen is blue, the first display
properly.

Second start of X or after a switch to VT and come back, the second screen is
perfectly fine, and I can use it



Configuration :

xserver : 1.4.0.90 from mandriva 2008.1

Card (NV4B, 10de:02e1) on AGP bus :
01:00.0 VGA compatible controller: nVidia Corporation G73 [GeForce 7600 GS]
(rev a2)

Primary screen on DVI (with DVI to VGA adaptor) : IIYAMA A705MT (Vision master
pro 411) 

Secondary screen on VGA : IIYAMA S704HT (Vision master 404), this screen alone
had worked fine with nouveau on VGA since 18 months.

xrandr -q :
Screen 0: minimum 320 x 200, current 2048 x 768, maximum 3000 x 1024
DVI-I-0 connected 1024x768+1024+0 (normal left inverted right x axis y axis)
320mm x 240mm
   1024x768_85.00   84.9*+
   1352x1014      59.9  
   1280x1024      75.0  
   1152x864       75.0  
   1024x768_100.00  100.0  
   1024x768       75.1     70.1     60.0  
   832x665        97.7  
   832x624        74.6  
   800x600_85.00   84.9  
   800x600        72.2     75.0     60.3     56.2  
   640x480_85.00   84.6  
   640x480        75.0     72.8     66.7     69.6     60.0     59.9  
   512x384       120.0  
   400x300       120.6  
   320x240       120.1  
VGA-0 connected 1024x768+0+0 (normal left inverted right x axis y axis) 320mm x
240mm
   1024x768_85.00   84.9*+
   1280x1024      75.0  
   1152x864       75.0  
   1024x768       74.9     75.1     70.1     60.0  
   832x624        74.6     74.8  
   800x600_85.00   84.9  
   800x600        72.2     75.0     60.3     56.2  
   640x480_85.00   84.6  
   640x480        75.0     72.8     66.7     69.6     60.0     59.9  
   512x384       120.0  
   400x300       120.6  
   320x240       120.1


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--- Comment #1 from Mjules <mjulien.m at gmail.com>  2009-01-16 13:38:01
PST ---
Created an attachment (id=22038)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=22038)
Xorg log at first start when second display doesn't come up properly


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--- Comment #2 from Mjules <mjulien.m at gmail.com>  2009-01-16 13:38:53
PST ---
Created an attachment (id=22039)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=22039)
Xorg log at second start when everything is ok


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--- Comment #3 from Mjules <mjulien.m at gmail.com>  2009-01-16 13:40:24
PST ---
Created an attachment (id=22040)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=22040)
Xorg log with a VT switch, before, problem, after, fine


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--- Comment #4 from Mjules <mjulien.m at gmail.com>  2009-01-17 07:24:12
PST ---
I've made a small movie (~1 min ; 8MB) in order to better explain the
problem :
http://mjules.free.fr/nouveau/bug.avi

storyline : 
fresh boot in runlevel 3 (before the beginning of the movie)
2" : startx
30" : KDE is loaded, the screen on DVI (with adaptor) show KDE, the screen
on
VGA show nothing but a blue color
37" : I made a switch to VT
45" : I come back from VT to X, the two screen display KDE in clone mode as
expected initially.

thx


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--- Comment #5 from Stuart Bennett <sb476 at cam.ac.uk>  2009-01-19
09:59:05 PST ---
Thanks, for the video, that explains it really well.

1) it would seem you are using an FB for the console.  Certainly this can cause
problems if it's nvidiafb.  Even if it's vesafb it may be worth trying a
boot
with "vga=0" added to the end of your kernel parameters to force a
text-mode
only boot.

2) assuming this doesn't fix it, please make register dumps while in X, both
before (broken) and after (working) the switch to and from VT.

Use my version of radeontool to make these.  It can be acquired by:

git clone git://anongit.freedesktop.org/~stuart/radeontool
cd radeontool; make

then dumps made by

./radeontool regs > logfile


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--- Comment #6 from Mjules <mjulien.m at gmail.com>  2009-01-19 10:21:33
PST ---
Hi,

thx for your answer

disabling vesafb doesn't fix the problem but it becomes different : 
now the secondary screen doesn't come up at all at first start. It is
powered
but stays black as if it doesn't receive a signal. 

As previously switch to VT and come back fix the display.

Dumps attached


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--- Comment #7 from Mjules <mjulien.m at gmail.com>  2009-01-19 10:22:29
PST ---
Created an attachment (id=22099)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=22099)
Dump of register before switch to VT (with problem)


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--- Comment #8 from Mjules <mjulien.m at gmail.com>  2009-01-19 10:23:10
PST ---
Created an attachment (id=22100)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=22100)
Dump of reg after the switch (everything works fine)


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--- Comment #9 from Stuart Bennett <sb476 at cam.ac.uk>  2009-01-19
11:01:47 PST ---
Try running these register writes, all together in a script and see if it fixes
anything (in the same mode you made the dumps - I assume vesafb enabled?)

./radeontool regset C1:00 0xa7
./radeontool regset C1:01 0x7f
./radeontool regset C1:02 0x7f
./radeontool regset C1:03 0x8b
./radeontool regset C1:04 0x88
./radeontool regset C1:05 0x95
./radeontool regset C1:06 0x27
./radeontool regset C1:07 0xf5

If that doesn't produce anything, it might be interesting to see the reg
dumps
for the vesafb disabled case.


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--- Comment #10 from Mjules <mjulien.m at gmail.com>  2009-01-19 11:19:14
PST ---
Dumps were made with vga=0 (but vesafb has been compiled inside the kernel by
my distro)

Writing the registers seems to solve the problem :) the screen display fine
after that.

thx


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--- Comment #11 from Stuart Bennett <sb476 at cam.ac.uk>  2009-01-19
11:39:34 PST ---
Created an attachment (id=22101)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=22101)
debug patch

Hm, weird :)  Please apply this patch and attach an Xorg log showing: starting
(broken)->switch to vt->switch to X (working)


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--- Comment #12 from Mjules <mjulien.m at gmail.com>  2009-01-19 12:24:13
PST ---
Created an attachment (id=22102)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=22102)
Xorg Log with debug patch applied and VT switch


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--- Comment #13 from Mjules <mjulien.m at gmail.com>  2009-01-19 12:25:05
PST ---
Log attached

Could the weirdness you see come from grub ? my distro is using a
"graphic"
grub.


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--- Comment #14 from Stuart Bennett <sb476 at cam.ac.uk>  2009-01-19
13:12:56 PST ---
Created an attachment (id=22104)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=22104)
test patch

please test if this fixes things


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--- Comment #15 from Mjules <mjulien.m at gmail.com>  2009-01-19 13:43:18
PST ---
It works with your test patch applied :)

thx


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--- Comment #16 from Stuart Bennett <sb476 at cam.ac.uk>  2009-01-19
15:47:40 PST ---
Created an attachment (id=22108)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=22108)
(hopefully) final patch

Ok, this is what I intend to push, provided it works :)  Can you verify it
still fixes it for you (and doesn't break anything else)?


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--- Comment #17 from Mjules <mjulien.m at gmail.com>  2009-01-20 13:00:04
PST ---
Your last patch fixes the bug :), it doesn't seems to cause other problems
:)

thanks a lot.


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Stuart Bennett <sb476 at cam.ac.uk> changed:

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




--- Comment #18 from Stuart Bennett <sb476 at cam.ac.uk>  2009-01-20
17:46:02 PST ---
Pushed.

http://cgit.freedesktop.org/nouveau/xf86-video-nouveau/commit/?id=3e971f63b6b6859acc19a52a4003bb6041cc5374


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