[Mesa-dev] [Bug 69101] prime: black window

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=69101

--- Comment #27 from viktor <linux776 at gmail.com> ---
Hi guys!
Fedora 22 x86_64, kernel 4.0.4-303, KDE Frameworks 5.10.0, KWin 5.3.1-2, OpenGL
3.1 backend for KWin compositor, xorg-x11-drv-ati-7.5.0-3 and
xorg-x11-drv-intel-2.99.917-10.20150526 vga drivers, XOrg-xserver 1.17.1-14,
the second monitor is connected to the D-SUB output of my laptop (Lenovo G570)

lspci gives:
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core
Processor Family Integrated Graphics Controller (rev 09)
        Subsystem: Lenovo Device 397a
        Kernel driver in use: i915
        Kernel modules: i915
--
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Robson CE [Radeon HD 6370M/7370M] (rev ff)
        Kernel driver in use: radeon
        Kernel modules: radeon

I've already done xrandr --setprovideroffloadsink radeon Intel

The problem still remains: when I run glxgears (or another OpenGL app) without
DRI_PRIME=1 all seems good but with that variable I get black screen. The
problem disappears when I switch to another window and back. With XRender
backend for KWin all works like a charm but I don't want to use XRender because
of high CPU load and overheating.

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