[Bug 28383] New: Cloned screens with different res/refresh cause problems with mesa demos since new dri2 vsync.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=28383

           Summary: Cloned screens with different res/refresh cause
                    problems with mesa demos since new dri2 vsync.
           Product: Mesa
           Version: git
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/R600
        AssignedTo: dri-devel at lists.freedesktop.org
        ReportedBy: lists at andyfurniss.entadsl.com


I think this is linked to the new dri2 vsync but mat be wrong...

rv670 mesa git, ddx git xorg git (2 weeks ago) drt kernels.

Not just latest drt and unrelated to tiling patches.

I am starting with a TV connected @ 1024x768 + vga monitor @ 1920x1080 so the
top left section of the monitor screen gets tv(50Hz) vsync - monitor is 60Hz.

If I start a mesa demo and it starts in the TV area it will sync to 50HZ if I
move it outside the top left area it will sync to 60Hz.

The problem is if I then move it back to the TV area it will stop rendering and
become unresponsive. I can <ctrl><c> it but the window will remain. If I the
move the window around enough I can get xserver to segfault.

This doesn't happen with UMS or a drt from 29th April (uses old vsync).
It doesn't happen if I disable TV with xrandr.

[   489.682] 0: /home/andy/Src/Xorg-git/modular/bin/Xorg (xorg_backtrace+0x3b)
[0x80da21b]
[   489.682] 1: /home/andy/Src/Xorg-git/modular/bin/Xorg (0x8048000+0x59ca5)
[0x80a1ca5]
[   489.682] 2: (vdso) (__kernel_rt_sigreturn+0x0) [0xffffe40c]
[   489.682] 3: /home/andy/Src/Xorg-git/modular/bin/Xorg (LocalClient+0x41)
[0x809d8d1]
[   489.682] 4:
/home/andy/Src/Xorg-git/modular/lib/xorg/modules/extensions/libdri2.so
(0xb73ce000+0x309b) [0xb73d109b]
[   489.682] 5: /home/andy/Src/Xorg-git/modular/bin/Xorg (0x8048000+0x25198)
[0x806d198]
[   489.682] 6: /home/andy/Src/Xorg-git/modular/bin/Xorg (0x8048000+0x1a86a)
[0x806286a]
[   489.682] 7: /lib/libc.so.6 (__libc_start_main+0xd0) [0xb7495380]
[   489.682] 8: /home/andy/Src/Xorg-git/modular/bin/Xorg (0x8048000+0x1a481)
[0x8062481]
[   489.682] Segmentation fault at address 0x18

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