On 01/13/2013 01:34 PM, Thomas Schlichter wrote: > Hi, > > there is a long-standing regression about new C-states not working after > disconnecting AC power from a laptop if the cpuidle driver "acpi-idle" is > used. It was reported here: > > [1] https://bugzilla.kernel.org/show_bug.cgi?id=42870 (March 5th 2012) > [2] https://bugzilla.kernel.org/show_bug.cgi?id=43349 (June 7th 2012) > [3] https://lkml.org/lkml/2012/10/16/518 (October 19th 2012) > > In [1] Andreas proposed a patch that initialized the missing power_usage > values from within acpi_idle in the same way as cpuidle does. > In [2] I proposed a patch to use the power values provided by ACPI to > initialize the power_usage variables. > In [3] Julius proposed a patch to call the initialization function > set_power_states() not only once, but always when the C-states change. > > Currently, Daniel Lezcano seems to be working on an intrusive change of not > using the power_usage value at all for choosing a C-state: > > [4] https://lkml.org/lkml/2012/12/14/155 > > As I could not find any of these patches in any git trees to be merged for > 3.8, I propose an other, least intrusive patch for the time being. It is > attached an initializes _all_ power_usage values in the first place. > > As this is a real power consumption regression since 3.2, I really ask you to > apply anything and push it to stable, too! Rafael, is possible to apply the patch [1/2] I previously sent ? https://patchwork.kernel.org/patch/1878691/ So we get this bug fixed. I will resend the patch [2/2] as soon as possible. -- Daniel -- <http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs Follow Linaro: <http://www.facebook.com/pages/Linaro> Facebook | <http://twitter.com/#!/linaroorg> Twitter | <http://www.linaro.org/linaro-blog/> Blog -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
