On Mon, Nov 21, 2011 at 23:40, Keith Packard keithp@keithp.com wrote:
On Mon, 21 Nov 2011 22:48:21 +0000 (Local time zone must be set--see zic manual page), Marcos Paulo de Souza marcos.mage@gmail.com wrote:
My max_brightness is 1, and my brightness is 0.
Right, we've prevented the internal backlight driver from exposing a max value of 0 as that's just confusing.
But, my acpi_video0 have a max_brightness value = 9...
Right, sounds like your device is just using some other backlight controller, which is perfectly reasonable.
So, what can I do to silence this warning...? Change the driver of backlight?
If your backlight keys work correctly, then things are fine and perhaps we should just remove the warning from the driver, or disable the internal driver when we discover this situation.
This is the first time I've heard of this warning appearing...
It appears here as well. I think it was since 2.6.39 or 3.0, I'm not sure.
Same card:
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07) (prog-if 00 [VGA controller]) Subsystem: Dell Device 02bb Flags: bus master, fast devsel, latency 0, IRQ 45 Memory at f6400000 (64-bit, non-prefetchable) [size=4M] Memory at d0000000 (64-bit, prefetchable) [size=256M] I/O ports at 1800 [size=8] Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [d0] Power Management version 3 Kernel driver in use: i915
00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07) Subsystem: Dell Device 02bb Flags: bus master, fast devsel, latency 0 Memory at f6100000 (64-bit, non-prefetchable) [size=1M] Capabilities: [d0] Power Management version 3
My kernel log has:
[drm] Driver supports precise vblank timestamp query. composite sync not supported fixme: max PWM is zero. composite sync not supported
Is this "composite sync not supported" related to this issue?
Lucas De Marchi