<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [R9 270x] Intermittent flickering of entire screen" href="https://bugs.freedesktop.org/show_bug.cgi?id=73116#c7">Comment # 7</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [R9 270x] Intermittent flickering of entire screen" href="https://bugs.freedesktop.org/show_bug.cgi?id=73116">bug 73116</a> from <a class="email" href="mailto:zen18@teknik.io" title="zen18@teknik.io">zen18@teknik.io</a> <pre>> It seems there is a problem with powersafe: > > With auto: > echo auto > /sys/class/drm/card0/device/power_dpm_force_performance_level > > you will see heavy screen flickering on higher display resolutions (2560 x > 1440). It's ok with 1920x1200. > > With low or high: > echo low > /sys/class/drm/card0/device/power_dpm_force_performance_level or > echo high > /sys/class/drm/card0/device/power_dpm_force_performance_level > > there is no screen flickering with all display resolutions. > > hardware: > > 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] > Curacao XT / Trinidad XT [Radeon R7 370 / R9 270X/370X] > > Kernel: mainline 4.7.0-rc7 > > Drivers: > x11-drivers/xf86-video-ati-7.7.0 > media-libs/mesa-12.0.1 (with radeon and radeonsi enabled) > x11-base/xorg-server-1.18.3 (In reply to peter.garba from <a href="show_bug.cgi?id=73116#c5">comment #5</a>) Can confirm. Tho I have flickering even with 1920x1080. Linux 4.11.7-1-ARCH, Vendor: X.Org (0x1002) Device: AMD TAHITI (DRM 2.49.0 / 4.11.7-1-ARCH, LLVM 4.0.1) (0x6798) Version: 17.1.4 Accelerated: yes Video memory: 3072MB Unified memory: no Preferred profile: core (0x1) Max core profile version: 4.5 Max compat profile version: 3.0 Max GLES1 profile version: 1.1 Max GLES[23] profile version: 3.1 OpenGL version string: 3.0 Mesa 17.1.4 [ 4.336] (II) Module radeon: vendor="X.Org Foundation" [ 4.336] compiled for 1.19.3, module version = 7.9.0</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>