[Bug 69528] intel driver shows blank screen when set to UXA only after cold start

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=69528

--- Comment #6 from 3aditya3 at gmail.com ---
Ok, using the "DefaultDepth 24" directive with SNA, gets rid of the gradient
rendering problem. But there is still a problem of portions of windows not
getting repainted/updated spontaneously.

Steps to reproduce: start playing a video in VLC player; activate another
window (eg. firefox) by clicking in it.
What happens: the video frame of VLC becomes completely black, only audio's
playing
What should have happened: the video should continue to render

If I resize VLC player or stop-start the video, the video appears again. Click
on another window and the video frame of VLC blacks out again.


$ cat /etc/X11/xorg.conf 
Section "Device"
    Identifier "device0"
    Driver "intel"
    Option "AccelMethod" "SNA"
EndSection

Section "Screen"
    Identifier "screen0"
    DefaultDepth 24
EndSection



$ cat /var/log/Xorg.0.log
....
....
....
[    22.229] (II) intel(0): SNA compiled: xserver-xorg-video-intel
2:2.21.15-1+b2 (amd64 / i386 Build Daemon (babin)
<buildd-babin at buildd.debian.org>)
[    22.270] (II) intel(0): Creating default Display subsection in Screen
section
    "screen0" for depth/fbbpp 24/32
[    22.270] (**) intel(0): Depth 24, (--) framebuffer bpp 32
[    22.271] (==) intel(0): RGB weight 888
[    22.271] (==) intel(0): Default visual is TrueColor
[    22.271] (**) intel(0): Option "AccelMethod" "SNA"
[    22.271] (--) intel(0): Integrated Graphics Chipset: Intel(R) 845G
[    22.272] (--) intel(0): CPU: x86, sse2
[    22.272] (**) intel(0): Framebuffer tiled
[    22.272] (**) intel(0): Pixmaps tiled
[    22.272] (**) intel(0): "Tear free" disabled
[    22.272] (**) intel(0): Forcing per-crtc-pixmaps? no
[    22.272] (II) intel(0): Output VGA1 has no monitor section
[    22.272] (--) intel(0): Output VGA1 using initial mode 1600x900 on pipe 0
[    22.272] (==) intel(0): DPI set to (96, 96)
[    22.272] (II) Loading sub module "dri2"
[    22.272] (II) LoadModule: "dri2"
[    22.272] (II) Module "dri2" already built-in
[    22.272] (==) Depth 24 pixmap format is 32 bpp
[    22.397] (II) intel(0): SNA initialized with Almador (gen2) backend
[    22.397] (==) intel(0): Backing store disabled
[    22.397] (==) intel(0): Silken mouse enabled
[    22.398] (II) intel(0): HW Cursor enabled
[    22.398] (II) intel(0): RandR 1.2 enabled, ignore the following RandR
disabled message.
[    22.436] (==) intel(0): DPMS enabled
[    22.436] (II) intel(0): Textured video not supported on this hardware
[    22.496] (II) intel(0): [DRI2] Setup complete
[    22.496] (II) intel(0): [DRI2]   DRI driver: i915
[    22.496] (II) intel(0): direct rendering: DRI2 Enabled
[    22.496] (==) intel(0): hotplug detection: "enabled"
[    22.496] (--) RandR disabled
[    22.556] (II) SELinux: Disabled on system
[    23.277] (II) AIGLX: enabled GLX_MESA_copy_sub_buffer
[    23.277] (II) AIGLX: enabled GLX_INTEL_swap_event
[    23.277] (II) AIGLX: enabled GLX_ARB_create_context
[    23.277] (II) AIGLX: enabled GLX_ARB_create_context_profile
[    23.277] (II) AIGLX: enabled GLX_EXT_create_context_es2_profile
[    23.277] (II) AIGLX: enabled GLX_SGI_swap_control and GLX_MESA_swap_control
[    23.277] (II) AIGLX: GLX_EXT_texture_from_pixmap backed by buffer objects
[    23.278] (II) AIGLX: Loaded and initialized i915
[    23.278] (II) GLX: Initialized DRI2 GL provider for screen 0
[    23.303] (II) intel(0): switch to mode 1600x900 at 60.0 on pipe 0 using VGA1,
position (0, 0), rotation normal
[    23.320] (II) intel(0): Setting screen physical size to 423 x 238
....
....
....

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