[Bug 102144] video tearing since update to xf86-video-ati 1:7.8.99.r16.gea30d856-1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102144

--- Comment #10 from Barto <mister.freeman at laposte.net> ---
Ok,

I notice also that DRI 3 is enabled by default in 1:7.9.x :

$ cat bad_case_xorg_log_video-ati-1.7.9.0.txt | grep DRI
[ 12603.610] (II) glamor: EGL version 1.4 (DRI2):
[ 12603.703] (II) RADEON(0): [DRI2] Setup complete
[ 12603.703] (II) RADEON(0): [DRI2]   DRI driver: r600
[ 12603.703] (II) RADEON(0): [DRI2]   VDPAU driver: r600
[ 12603.704] (==) RADEON(0): DRI3 enabled
[ 12603.823] (II) GLX: Initialized DRI2 GL provider for screen 0

but not in 1:7.8 :

$ cat good_case_xorg_log_video-ati-1.7.8.0.txt | grep DRI
[    69.914] (II) RADEON(0): [DRI2] Setup complete
[    69.914] (II) RADEON(0): [DRI2]   DRI driver: r600
[    69.914] (II) RADEON(0): [DRI2]   VDPAU driver: r600
[    69.920] (==) RADEON(0): DRI3 disabled
[    72.787] (II) GLX: Initialized DRI2 GL provider for screen 0

I think it can explain why I see no tearing with "vsync disabled" in 1:7.8.x
version, with DRI 2 it seems that there is no need to activate vsync, 

but with DRI 3 I have to activate vsync in order to avoid tearing

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