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<b><a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - prime: black window"
href="https://bugs.freedesktop.org/show_bug.cgi?id=69101#c27">Comment # 27</a>
on <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - prime: black window"
href="https://bugs.freedesktop.org/show_bug.cgi?id=69101">bug 69101</a>
from <span class="vcard"><a class="email" href="mailto:linux776@gmail.com" title="viktor <linux776@gmail.com>"> <span class="fn">viktor</span></a>
</span></b>
<pre>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.</pre>
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