Dell Studio 1558 w/ core i7 + radeon hd5400 series, some issues

dell-linux-desktop at dell-linux-desktop at
Thu May 31 12:12:26 CDT 2012

On 30/05/12 06:55 AM, Michael Schmitt wrote:
> 1.) Battery only holds for about 2 hours. Is that quite normal for the 
> radeon / i7 edition? The radeon card is already set to its lowest 
> setting (echo low > /sys/class/drm/card0/device/power_profile).

How old is the battery? Note that the proprietary drivers have significantly 
better power management.

> 2.) Set charger behavior to "disabled/enabled" in GNU/Linux, any way to 
> do it? If not, would it be possible to get the specs of that feature so 
> a kernel / acpi / whatever hacker may have a look there? Hibernate and 
> changing that in the BIOS works, but it is kinda annoying.

Not sure what you mean here.

> 3.) Display brightness not changeable in GNU/Linux. The hardware keys 
> work and plugging in ac-power or running only on batteries does change 
> the brightness. Not reliable (sometimes it changes from low to high when 
> disconnecting the power-cord or the other way around

It doesn't work in software for me, but I've never run into problems with the 
automatic ajustments.

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