[PATCH xf86-video-dummy 0/6] Cleanups and RandR 1.2 support

Wed Sep 16 05:16:42 PDT 2015

Hello,

On 25/01/15 08:08, Aaron Plattner wrote:
> This series is a counterproposal to Nicolas's patch "dummy: Add support for
> custom resolutions (RandR 1.2)" [1]
>
> This version allows using xrandr's --fb option to resize the screen rather than
> having to try to create fake modes that pass validation against made-up hardware
> constraints.  It also allows resizing the framebuffer all the way up to
> 32767x34767 (assuming malloc succeeds).
>
> I didn't try to test the interaction of that with DGA and opted instead to just
> get rid of DGA support.  Let me know if you think DGA in xf86-video-dummy is
> actually useful for something and I can try to see if that makes sense.
If I understand what this is supposed to allow us to do... I like it.

The patches still apply cleanly, but when I try to use the dummy driver,
it crashes in libpixman.
Am I missing something?

$ gdb --args /usr/libexec/Xorg  -noreset -nolisten tcp +extension GLX
+extension RANDR +extension RENDER -auth $XAUTHORITY -logfile
${HOME}/.xpra/Xorg.10.log -config /etc/xpra/xorg.conf :10
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Reading symbols from /usr/libexec/Xorg...Reading symbols from
/usr/lib/debug/usr/libexec/Xorg.debug...done.
done.
(gdb) r
Starting program: /usr/libexec/Xorg -noreset -nolisten tcp +extension
GLX +extension RANDR +extension RENDER -auth
/run/user/1000/gdm/Xauthority -logfile /home/antoine/.xpra/Xorg.10.log
-config /etc/xpra/xorg.conf :10
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".

X.Org X Server 1.17.2
Release Date: 2015-06-16
X Protocol Version 11, Revision 0
Build Operating System:  4.0.4-202.fc21.x86_64
Current Operating System: Linux desktop 4.1.6-200.fc22.x86_64 #1 SMP Mon
Aug 17 19:54:31 UTC 2015 x86_64
Kernel command line: BOOT_IMAGE=/vmlinuz-4.1.6-200.fc22.x86_64
root=LABEL=SSDRAIDROOT ro domdadm rd.blacklist=nouveau nomodeset
rd.md.uuid=730e916f:abc3f9b9:f5b2eb84:294a44aa rootfstype=ext4
LANG=en_GB.UTF-8
Build Date: 15 July 2015  08:16:41AM
Build ID: xorg-x11-server 1.17.2-2.fc22
Current version of pixman: 0.32.6
    Before reporting problems, check http://wiki.x.org
    to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
    (++) from command line, (!!) notice, (II) informational,
    (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(++) Log file: "/home/antoine/.xpra/Xorg.10.log", Time: Wed Sep 16
19:14:06 2015
(++) Using config file: "/etc/xpra/xorg.conf"
(==) Using config directory: "/etc/X11/xorg.conf.d"
(==) Using system config directory "/usr/share/X11/xorg.conf.d"

Program received signal SIGSEGV, Segmentation fault.
sse2_fill (imp=<optimized out>, bits=<optimized out>, stride=<optimized
out>, bpp=<optimized out>, x=<optimized out>, y=<optimized out>,
width=8192, height=4068, filler=0) at pixman-sse2.c:3403
3403            save_128_aligned ((__m128i*)(d + 16),  xmm_def);
(gdb) bt
#0  sse2_fill (imp=<optimized out>, bits=<optimized out>,
stride=<optimized out>, bpp=<optimized out>, x=<optimized out>,
y=<optimized out>, width=8192, height=4068, filler=0) at pixman-sse2.c:3403
#1  0x00007ffff6aff91b in _pixman_implementation_fill (imp=0x8398c0,
bits=bits at entry=0x865070, stride=stride at entry=8192, bpp=bpp at entry=32,
x=x at entry=0, y=y at entry=0, width=8192, height=4096, filler=<optimized
out>) at pixman-implementation.c:277
#2  0x00007ffff6ab1869 in pixman_fill (bits=bits at entry=0x865070,
stride=stride at entry=8192, bpp=bpp at entry=32, x=x at entry=0, y=y at entry=0,
width=width at entry=8192, height=4096, filler=0) at pixman.c:766
#3  0x00007fffef375448 in fbFill (pDrawable=pDrawable at entry=0x87ab30,
pGC=pGC at entry=0x878c90, x=x at entry=0, y=y at entry=0,
width=width at entry=8192, height=height at entry=4096) at fbfill.c:125
#4  0x00007fffef375cb0 in fbPolyFillRect (pDrawable=0x87ab30,
pGC=0x878c90, nrect=<optimized out>, prect=0x91da58) at fbfillrect.c:72
#5  0x000000000051fec8 in damagePolyFillRect (pDrawable=0x87ab30,
pGC=0x878c90, nRects=1, pRects=<optimized out>) at damage.c:1193
#6  0x0000000000578d12 in miPaintWindow (pWin=<optimized out>,
pWin at entry=0x87ab30, prgn=prgn at entry=0x7fffffffdc00, what=what at entry=0)
at miexpose.c:560
#7  0x0000000000579541 in miWindowExposures (pWin=0x87ab30,
prgn=0x7fffffffdc00) at miexpose.c:395
#8  0x0000000000467547 in MapWindow (pWin=0x87ab30, client=0x83bb00) at
window.c:2600
#9  0x000000000043e560 in dix_main (argc=17, argv=0x7fffffffdd98,
envp=<optimized out>) at main.c:263
#10 0x00007ffff5996700 in __libc_start_main (main=0x428990 <main>,
argc=17, argv=0x7fffffffdd98, init=<optimized out>, fini=<optimized
out>, rtld_fini=<optimized out>, stack_end=0x7fffffffdd88) at
libc-start.c:289
#11 0x00000000004289c9 in _start ()

Thanks
Antoine

>
> [1] http://lists.x.org/archives/xorg-devel/2014-November/044580.html
>
> Aaron Plattner (6):
>   Remove pointless empty functions
>   Delete XV stuff
>   Delete dPtr->screenSaver
>   Remove DGA support
>   Get rid of dPtr->FBBase
>   Support RandR 1.2
>
>  configure.ac       |   9 --
>  src/Makefile.am    |   5 --
>  src/dummy.h        |  20 -----
>  src/dummy_cursor.c |   2 -
>  src/dummy_dga.c    | 175 ------------------------------------
>  src/dummy_driver.c | 253 ++++++++++++++++-------------------------------------
>  6 files changed, 73 insertions(+), 391 deletions(-)
>  delete mode 100644 src/dummy_dga.c
>

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