https://bugs.freedesktop.org/show_bug.cgi?id=33031
Summary: r600 DPMS does not turn of backlight Product: DRI Version: unspecified Platform: x86-64 (AMD64) OS/Version: Linux (All) Status: NEW Severity: normal Priority: medium Component: DRM/Radeon AssignedTo: dri-devel@lists.freedesktop.org ReportedBy: cbandy@jbandy.com
When I issue `setterm -blank force` or `xset dpms force off` the laptop screen goes blank but the backlight does not turn off.
# lspci -vns 01:00.0 01:00.0 0300: 1002:68c1 (prog-if 00 [VGA controller]) Subsystem: 103c:1449 Flags: bus master, fast devsel, latency 0, IRQ 49 Memory at c0000000 (64-bit, prefetchable) [size=256M] Memory at d4000000 (64-bit, non-prefetchable) [size=128K] I/O ports at 4000 [size=256] Expansion ROM at d4040000 [disabled] [size=128K] Capabilities: [50] Power Management version 3 Capabilities: [58] Express Legacy Endpoint, MSI 00 Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities: [100] Vendor Specific Information <?> Kernel driver in use: radeon Kernel modules: radeon
In the attached logs,
1. Booted without X 2. Ran # setterm -blank force ; sleep 5 ; setterm -blank poke 3. Started X 4. Ran $ xset dpms force off ; sleep 5 ; xset dpms force on