Nouveau - Mar 2008 - [Bug 14820] New: Double mouse cursor on nv4

http://bugs.freedesktop.org/show_bug.cgi?id=14820

           Summary: Double mouse cursor on nv4
           Product: xorg
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: marchesin at icps.u-strasbg.fr
         QAContact: xorg-team at lists.x.org


Created an attachment (id=14833)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14833)
Xorg log file

With Randr1.2 enabled, I get two mouse cursors after a few mode changes. One
that moves (sw emulated cursor) and one that doesn't (presumably the hw
cursor
sitting there).

01:00.0 0300: 10de:002d (rev 15)
01:00.0 VGA compatible controller: nVidia Corporation NV5M64 [RIVA TNT2 Model
64/Model 64 Pro] (rev 15)


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--- Comment #1 from Stephane Marchesin <marchesin at icps.u-strasbg.fr> 
2008-03-04 15:10:20 PST ---
Same on this card:

00:08.0 0300: 10de:002c (rev 15)
00:08.0 VGA compatible controller: nVidia Corporation NV6 [Vanta/Vanta LT] (rev
15)

The 2nd cursor seems to appear after the first mode change, i.e. after xrandr
-s 1 for example. The hw cursor is the default X cursor (X shaped) and the sw
cursor is my normal gnome cursor and works fine.


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--- Comment #2 from Stephane Marchesin <marchesin at icps.u-strasbg.fr> 
2008-03-04 15:11:52 PST ---
Created an attachment (id=14834)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14834)
Log file on the 2nd card


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--- Comment #3 from Stephane Marchesin <marchesin at icps.u-strasbg.fr> 
2008-03-04 15:43:29 PST ---
I also get this on an nv10. On that card, the hardware cursor is wrong, but
that's for another bug.

01:00.0 0300: 10de:0101 (rev 10)
01:00.0 VGA compatible controller: nVidia Corporation NV10DDR [GeForce 256 DDR]
(rev 10)


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--- Comment #4 from Stephane Marchesin <marchesin at icps.u-strasbg.fr> 
2008-03-04 15:44:06 PST ---
Created an attachment (id=14838)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14838)
Log file with the nv10


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--- Comment #5 from Maarten Maathuis <madman2003 at gmail.com>  2008-03-04
15:45:41 PST ---
Do you also get this when forcing a SWCursor on a NV11+ card?


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--- Comment #6 from Stephane Marchesin <marchesin at icps.u-strasbg.fr> 
2008-03-05 11:11:52 PST ---
(In reply to comment #5)
> Do you also get this when forcing a SWCursor on a NV11+ card?
> 
No I don't.


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--- Comment #7 from Stuart Bennett <sb476 at cam.ac.uk>  2008-03-06
14:17:01 PST ---
Created an attachment (id=14896)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14896)
1st option

First of two possible fixes. This one definitely does the right thing, but is
probably overkill.


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--- Comment #8 from Stuart Bennett <sb476 at cam.ac.uk>  2008-03-06
14:18:36 PST ---
Created an attachment (id=14897)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=14897)
2nd option

A less heavyweight solution, but I don't know for sure that GetSpriteCursor
is
always going to do the right thing. This stuff really wants fixing in the
xserver.


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

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|nouveau at lists.freedesktop.or|xorg-team at lists.x.org
                   |g                           |
          Component|Driver/nouveau              |Server/general
            Summary|Double mouse cursor on nv4  |randr 1.2 always shows the
                   |                            |hwcursor after a mode change
            Version|unspecified                 |git




--- Comment #9 from Stuart Bennett <sb476 at cam.ac.uk>  2008-03-06
14:47:20 PST ---
Original nouveau bug repurposed for xserver issue.

After an xrandr mode change, drivers tend to call xf86_reload_cursors in the
commit function. This in turn will show a hw cursor, if configured. This is not
the correct behaviour for hardware that cannot do alpha cursors natively, if
the cursor is an alpha cursor at the time; two cursors (one hardware (2
colour), one software (alpha)) show up, when the hardware cursor should be
hidden.

In the nouveau case, the 1st option in comment 7 has been applied to the driver
as a work-around which takes a trip through xf86CursorSetCursor which sorts
things out.


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