<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - Open source radeon drivers not working properly with Radeon HD 8550M" href="https://bugs.freedesktop.org/show_bug.cgi?id=94708#c12">Comment # 12</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - Open source radeon drivers not working properly with Radeon HD 8550M" href="https://bugs.freedesktop.org/show_bug.cgi?id=94708">bug 94708</a> from <a class="email" href="mailto:arthur.essenfelder@gmail.com" title="Arthur Hrast Essenfelder <arthur.essenfelder@gmail.com>"> Arthur Hrast Essenfelder</a> <pre>I am also facing a similar issue. I also get very low performance when using the DIS Card and the radeon driver in comparison with the IGD Intel card. # vblank_mode=0 glxgears ATTENTION: default value of option vblank_mode overridden by environment. ATTENTION: default value of option vblank_mode overridden by environment. 35719 frames in 5.0 seconds = 7143.730 FPS 35715 frames in 5.0 seconds = 7142.853 FPS 34593 frames in 5.0 seconds = 6910.545 FPS # DRI_PRIME=1 vblank_mode=0 glxgears ATTENTION: default value of option vblank_mode overridden by environment. 8298 frames in 5.0 seconds = 1659.484 FPS 8313 frames in 5.0 seconds = 1662.389 FPS 8315 frames in 5.0 seconds = 1662.897 FPS I posted this issue a few days ago on ask.fedoraproject.org but so far no luck: <a href="https://ask.fedoraproject.org/en/question/87235/low-performance-when-using-the-dis-card/">https://ask.fedoraproject.org/en/question/87235/low-performance-when-using-the-dis-card/</a> In any case, I think this is the best place to seek help. Here are more details on my system: Distributor ID: Fedora Description: Fedora release 23 (Twenty Three) # lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Whistler [Radeon HD 6730M/6770M/7690M XT] # cat /sys/kernel/debug/vgaswitcheroo/switch 0:IGD:+:Pwr:0000:00:02.0 1:DIS: :Pwr:0000:01:00.0 # glxinfo | grep "OpenGL renderer" OpenGL renderer string: Mesa DRI Intel(R) Sandybridge Mobile # DRI_PRIME=1 glxinfo | grep "OpenGL renderer" OpenGL renderer string: Gallium 0.4 on AMD TURKS (DRM 2.43.0, LLVM 3.7.0) # Xorg -version X.Org X Server 1.18.3</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>