[Bug 14859] New: External analog monitor does not show part of the output ( Randr12)

[Bug 14859] New: External analog monitor does not show part of the output ( Randr12)

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

http://bugs.freedesktop.org/show_bug.cgi?id=14859

           Summary: External analog monitor does not show part of the output
                    (Randr12)
           Product: xorg
           Version: unspecified
          Platform: PowerPC
        OS/Version: Linux (All)
            Status: NEW
          Severity: minor
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
        ReportedBy: sbriglie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
         QAContact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org


Created an attachment (id=14885)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14885)
xrandr --verbose output (with monitor connected and working)

Whenever I plug an external analog (VGA) monitor to my 12 inches Apple
powerbook I can see with xrandr that it is correctly recognized. When I turn it
on with xrandr --auto my desktop appears on the external monitor (mirroring) in
full height (768), but on the left the first 290 or so pixels out of 1024 are
black and the same happens to the last 16 on the right. This same behavior
happens with two different monitors.
Image quality is excellent and there's no distortion or stretching whatsoever,
the pixels are just plainly black. To give an ascii-art idea:

xxxxxooooooooooox
xxxxxooooooooooox
xxxxxooooooooooox
xxxxxooooooooooox
xxxxxooooooooooox
xxxxxooooooooooox

x are black, o are ok (proportions are of course not respected :))

Trying to change the resolution doesn't give a different behavior. I'm
attaching a xorg.log and the output of xrandr --verbose

This happens with git head for both ddx and drm, xorg server
1.4.1~git20080131-1 (debian package) and libxrandr2 1.2.2-1 on debian lenny ppc


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[Bug 14859] External analog monitor does not show part of the output ( Randr12)

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

http://bugs.freedesktop.org/show_bug.cgi?id=14859





--- Comment #1 from Jacopo <sbriglie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>  2008-03-06 11:58:06 PST ---
Created an attachment (id=14886)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14886)
Xorg.log of the X session with connection of the monitor


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[Bug 14859] External analog monitor does not show part of the output ( Randr12)

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

http://bugs.freedesktop.org/show_bug.cgi?id=14859





--- Comment #2 from Maarten Maathuis <madman2003-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>  2008-03-06 12:57:44 PST ---
I've noticed a problem, but this is beyond a quick fix, so this may take a day
or two.


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[Bug 14859] External analog monitor does not show part of the output ( Randr12)

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

http://bugs.freedesktop.org/show_bug.cgi?id=14859





--- Comment #3 from Maarten Maathuis <madman2003-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>  2008-03-06 14:10:20 PST ---
It seems it went a little faster than expected, please retry with current git.


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[Bug 14859] External analog monitor does not show part of the output ( Randr12)

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

http://bugs.freedesktop.org/show_bug.cgi?id=14859





--- Comment #4 from Jacopo <sbriglie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>  2008-03-07 04:55:47 PST ---
Created an attachment (id=14906)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14906)
newer xrandr --verbose output with git head 


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[Bug 14859] External analog monitor does not show part of the output ( Randr12)

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

http://bugs.freedesktop.org/show_bug.cgi?id=14859





--- Comment #5 from Jacopo <sbriglie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>  2008-03-07 04:57:39 PST ---
(In reply to comment #4)
> Created an attachment (id=14906)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14906) [details]
> newer xrandr --verbose output with git head 
> 

Hmm, nothing has changed in regard to this bug, I still get the same behavior.
I'm attaching again the xrandr --verbose output and the xserver log.


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[Bug 14859] External analog monitor does not show part of the output ( Randr12)

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http://bugs.freedesktop.org/show_bug.cgi?id=14859





--- Comment #6 from Jacopo <sbriglie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>  2008-03-07 04:58:52 PST ---
Created an attachment (id=14907)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14907)
Newer xorg.log


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[Bug 14859] External analog monitor does not show part of the output ( Randr12)

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http://bugs.freedesktop.org/show_bug.cgi?id=14859





--- Comment #7 from Maarten Maathuis <madman2003-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>  2008-03-07 05:19:58 PST ---
There is another potential issue, but i'll have to ask someone else about it.


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[Bug 14859] External analog monitor does not show part of the output ( Randr12)

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

http://bugs.freedesktop.org/show_bug.cgi?id=14859


Stuart Bennett <sb476-KWPb1pKIrIJaa/9Udqfwiw@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |sb476-KWPb1pKIrIJaa/9Udqfwiw@public.gmane.org




--- Comment #8 from Stuart Bennett <sb476-KWPb1pKIrIJaa/9Udqfwiw@public.gmane.org>  2008-03-07 07:01:01 PST ---
Some ideas of things to test:
1) Is the situation any better if the external head is plugged at boot?

2) If nouveau does not bring up the lvds head, does the external head work? --
to test this, add "return XF86OutputStatusDisconnected;" to the top of
nv_lvds_output_detect in nv_output.c

3) Attaching the output of "radeontool regs" to the bug (when both heads are
plugged and nouveau is running) would be interesting.

4) Likewise, comparison reg dumps if suggestions 1) or 2) work would be
invaluable.


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[Bug 14859] External analog monitor does not show part of the output ( Randr12)

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

http://bugs.freedesktop.org/show_bug.cgi?id=14859





--- Comment #9 from Jacopo <sbriglie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>  2008-03-07 08:47:56 PST ---
(In reply to comment #8)
> Some ideas of things to test:
> 1) Is the situation any better if the external head is plugged at boot?
> 

This is funny: it is reversed like this

xxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxx
oooooooooooooooo
oooooooooooooooo
oooooooooooooooo
oooooooooooooooo

meaning the top third or so is black, while the rest is ok, in full width this
time.


> 2) If nouveau does not bring up the lvds head, does the external head work? --
> to test this, add "return XF86OutputStatusDisconnected;" to the top of
> nv_lvds_output_detect in nv_output.c

This does not change anything with respect to attaching the second head while X
is running: the left stays black

> 3) Attaching the output of "radeontool regs" to the bug (when both heads are
> plugged and nouveau is running) would be interesting.
> 
> 4) Likewise, comparison reg dumps if suggestions 1) or 2) work would be
> invaluable.
> 

I'm attaching reg dumps in the two different situations, plus the xorg log with
the second head plugged at boot


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[Bug 14859] External analog monitor does not show part of the output ( Randr12)

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http://bugs.freedesktop.org/show_bug.cgi?id=14859





--- Comment #10 from Jacopo <sbriglie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>  2008-03-07 08:48:52 PST ---
Created an attachment (id=14909)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14909)
regdump with second head connected at boot


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[Bug 14859] External analog monitor does not show part of the output ( Randr12)

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http://bugs.freedesktop.org/show_bug.cgi?id=14859





--- Comment #11 from Jacopo <sbriglie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>  2008-03-07 08:49:29 PST ---
Created an attachment (id=14910)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14910)
regdump with second head hotplugged while X is running


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[Bug 14859] External analog monitor does not show part of the output ( Randr12)

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http://bugs.freedesktop.org/show_bug.cgi?id=14859





--- Comment #12 from Jacopo <sbriglie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>  2008-03-07 08:50:15 PST ---
Created an attachment (id=14911)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14911)
Xorg.log with second head connected at boot


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[Bug 14859] External analog monitor does not show part of the output ( Randr12)

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http://bugs.freedesktop.org/show_bug.cgi?id=14859





--- Comment #13 from Jacopo <sbriglie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>  2008-03-07 08:50:46 PST ---
Created an attachment (id=14912)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14912)
xrandr --verbose output with second head connected at boot


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[Bug 14859] External analog monitor does not show part of the output ( Randr12)

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

http://bugs.freedesktop.org/show_bug.cgi?id=14859


Jacopo <sbriglie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #14911|0                           |1
        is obsolete|                            |




--- Comment #14 from Jacopo <sbriglie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>  2008-03-07 08:52:33 PST ---
Created an attachment (id=14913)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14913)
Xorg.log with second head connected at boot


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[Bug 14859] External analog monitor does not show part of the output ( Randr12)

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http://bugs.freedesktop.org/show_bug.cgi?id=14859





--- Comment #15 from Stuart Bennett <sb476-KWPb1pKIrIJaa/9Udqfwiw@public.gmane.org>  2008-03-07 11:48:13 PST ---
Is the external head a real CRT, or instead an LCD over an analogue connection?

For the situation where the top of the screen is missing (plugged at boot),
what happens if you start nouveau -- does the top half stay missing, or does it
change to the side being missing? Does this change if you disable the laptop
display as described previously, and have the external head plugged in before
starting X?

If when nouveau is running and the screen was plugged at boot the external
display is any different to how it looks when hotplugged, a register dump would
also be useful -- I'm guessing the previous one was done from just offb?


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--- Comment #16 from Jacopo <sbriglie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>  2008-03-08 04:29:54 PST ---
(In reply to comment #15)
> Is the external head a real CRT, or instead an LCD over an analogue connection?
> 

This time it was a real CRT, the previous tests were with an LCD over analogue

> For the situation where the top of the screen is missing (plugged at boot),
> what happens if you start nouveau -- does the top half stay missing, or does it
> change to the side being missing? Does this change if you disable the laptop
> display as described previously, and have the external head plugged in before
> starting X?
> 

Well, at boot the external became all white with flickering when the kernel got
loaded and then when X started it came up displaying the bottom two thirds with
the top one black. I then tried unplugging, replugging, restarting X with the
monitor unplugged, etc. but the behavior remained this, it never reverted to
the situation "left third off" that happens when the external head is not
plugged at boot but hotplugged during a X session. In order to see again the
"left off" behavior I had to reboot keeping the monitor unplugged.

Disabling the laptop display does not change anything: if the monitor is
connected at boot the top is off when X starts, if instead (after a reboot) I
connect it before starting X the left stays off.

So I would say that the difference in behavior is given by having the monitor
connected at boot time. There's no difference instead between connecting it
before X starts or with X running.

> If when nouveau is running and the screen was plugged at boot the external
> display is any different to how it looks when hotplugged, a register dump would
> also be useful -- I'm guessing the previous one was done from just offb?
> 

No, both regdumps were done with the external head connected and working under
nouveau, the first one is when the external head was connected at boot (and so
top missing), the second one when it was simply hotplugged during a X session
(left missing). I didn't make myself clear on this.


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[Bug 14859] External analog monitor does not show part of the output ( Randr12)

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--- Comment #17 from Maarten Maathuis <madman2003-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>  2008-03-08 04:59:21 PST ---
So, the analog isn't activated properly by offb?

Also, can you test the dvi?


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--- Comment #18 from Jacopo <sbriglie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>  2008-03-08 05:31:28 PST ---
(In reply to comment #17)
> So, the analog isn't activated properly by offb?
> 
It is not. The same seems to happen during osx bootup: the analog remains white
and flickering until the graphical login screen appears

> Also, can you test the dvi?
> 

I don't have a DVI cable at hand, I'll see if I can get one in the next days


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[Bug 14859] External analog monitor does not show part of the output ( Randr12)

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--- Comment #19 from Jacopo <sbriglie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>  2008-03-29 06:24:38 PST ---
There has been a regression in the last two or so weeks: the secondary head is
still missing the left third and furthermore the image is flickering, like a
wrong frequency is set. Comparing a regdump with a previous one the culprit is
found to be the value of NV_RAMDAC_SEL_CLK0: the driver recently sets the wrong
value of
 0x00040014, whereas the old one was 0x00040044. Setting it manually with
radeontool fixes the flickering, but of course the left third stays black.

I did not manage to test dvi output, but I was however able to obtain a regdump
from OSX in the same configuration, i.e. secondary head connected and working
in mirror mode. I used airlied's hacked osx radeontool to do so, I'm attaching
the file in case you might find some source of inspiration in it


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[Bug 14859] External analog monitor does not show part of the output ( Randr12)

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http://bugs.freedesktop.org/show_bug.cgi?id=14859





--- Comment #20 from Jacopo <sbriglie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>  2008-03-29 06:27:14 PST ---
Created an attachment (id=15557)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=15557)
Regdump of osx in mirror mode


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--- Comment #21 from Stuart Bennett <sb476-KWPb1pKIrIJaa/9Udqfwiw@public.gmane.org>  2008-03-29 07:35:55 PST ---
Please attach an xorg log where sel_clk setting is misbehaving.


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--- Comment #22 from Jacopo <sbriglie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>  2008-03-29 11:18:21 PST ---
Created an attachment (id=15564)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=15564)
Xorg log with misbehaving SEL_CLK

Here it is


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--- Comment #23 from Stuart Bennett <sb476-KWPb1pKIrIJaa/9Udqfwiw@public.gmane.org>  2008-03-29 14:15:32 PST ---
SEL_CLK should be fixed now


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--- Comment #24 from Jacopo <sbriglie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>  2008-04-02 14:59:08 PST ---
(In reply to comment #23)
> SEL_CLK should be fixed now
> 

Yes, I can confirm this. The original issue is sill there though. Hopefully in
the coming weeks I'll have more time to dig into this issue and dump the
dumpable on OSX.

Btw, nice job fixing the backlight-that-didn't-turn-off problem :)


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--- Comment #25 from Jacopo <sbriglie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>  2009-02-06 01:58:40 PST ---
Coming back to this bug after a long time... The issue is still there with VGA.
I was able to test also the DVI output and that works perfectly :)

As a sidenote I'd like to point out that the PB12 has just a single mini-dvi
output, that gets used both by dvi-out and vga-out with two different adapter
cables. Don't know if this could be somehow related though


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[Bug 14859] External analog monitor does not show part of the output ( Randr12)

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--- Comment #26 from Stuart Bennett <sb476-KWPb1pKIrIJaa/9Udqfwiw@public.gmane.org>  2009-02-07 16:12:44 PST ---
Hi, looking at the regdumps again, the programmed monitor sizes are very
different; it's possible this is related to what's going wrong, but it seems
more likely the osx and linux radeontool dumps were made with different
monitors attached or had the same monitor running in different resolutions - do
you happen to recall if this was the case?  If it was, would you be able to
make new comparative dumps, of the same monitor (attempting) to run at the same
resolution (perhaps check in the xorg log for what res nouveau is setting, then
do the same in osx?).

The other issue is that there's something odd with the linux-made radeontool
dumps, causing the CRTC reads to be mis-indexed by one, such that the value of
CR(n) is printed in position CR(n+1).  Can you check please that there's no
modifications to your copy of radeontool before making any new dumps?  (or
clone a clean copy from git://anongit.freedesktop.org/~stuart/radeontool )


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--- Comment #27 from Pekka Paalanen <pq-X3B1VOXEql0@public.gmane.org>  2009-11-19 13:33:39 PST ---
Jacopo, how is it going with respect to this bug?
Could you try with KMS and see what the current situation is?


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[Bug 14859] External analog monitor does not show part of the output (Randr12)

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

http://bugs.freedesktop.org/show_bug.cgi?id=14859


graham.cole-N6BjORIo2pVBDgjK7y7TUQ@public.gmane.org changed:

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                 CC|                            |graham.cole-N6BjORIo2pVBDgjK7y7TUQ@public.gmane.org




--- Comment #28 from graham.cole-N6BjORIo2pVBDgjK7y7TUQ@public.gmane.org  2010-03-03 04:56:47 PST ---
I believe I'm seeing the same bug here on my 12" 1.5GHz PowerBook. I installed
Nouveau from git yesterday, and attaching my LCD monitor via VGA and enabling
via xrandr results in 20-30% of the left side of the screen coming up black.
Attaching via DVI works perfectly.

Looks like I have KMS enabled:
$ sudo cat /sys/module/nouveau/parameters/modeset
1

So I guess that doesn't help any. Let me know if there's anything I can provide
that could help this along. Sadly I don't have access to OSX at the moment
though.


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[Bug 14859] External analog monitor does not show part of the output (Randr12)

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=14859

Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> changed:

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             Status|NEW                         |RESOLVED
         Resolution|---                         |INVALID

--- Comment #29 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
It appears that this bug report has laid dormant for quite a while. Sorry we
haven't gotten to it. Since we fix bugs all the time, chances are pretty good
that your issue has been fixed with the latest software. Please give it a shot.
(Linux kernel 3.10.7, xf86-video-nouveau 1.0.9, mesa 9.1.6, or their git
versions.) If upgrading to the latest isn't an option for you, your distro's
bugzilla is probably the right destination for your bug report.

In an effort to clean up our bug list, we're pre-emptively closing all bugs
that haven't seen updates since 2011. If the original issue remains, please
make sure to provide fresh info, see http://nouveau.freedesktop.org/wiki/Bugs/
for what we need to see, and re-open this one.

Thanks,

The Nouveau Team

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