I do "acpi=off"
At least on older laptops even those that think they can do ACPI its generally a win. On newer boxes I'm just running the cpu speed daemon and a 100Hz kernel rather than the FC3 kernel.
Alan Cox wrote:
I do "acpi=off"
At least on older laptops even those that think they can do ACPI its generally a win. On newer boxes I'm just running the cpu speed daemon and a 100Hz kernel rather than the FC3 kernel.
What advantage is gained from turning ACPI off?
On Tue, Dec 21, 2004 at 11:44:20AM -0600, Cam Desautels wrote:
At least on older laptops even those that think they can do ACPI its generally a win. On newer boxes I'm just running the cpu speed daemon and a 100Hz kernel rather than the FC3 kernel.
What advantage is gained from turning ACPI off?
You can't mix and match APM and ACPI. And if you have a laptop which works really well with APM, that's generally better than ACPI works at its very best these days. (Suspend to disk might actually work with no difficulties, for example.)
Satish Balay wrote:
"acpi=off" => 'apm=on'
Does the stock FC3 kernel not have APM support? I passed the "acpi=off" option, then ran "apm -s" to which I was greeted with "No APM support in kernel."
Then I attempted a "modprobe apm" and got "FATAL: Module apm not found." What's up?
On Tue, 21 Dec 2004, Cam Desautels wrote:
Satish Balay wrote:
"acpi=off" => 'apm=on'
Does the stock FC3 kernel not have APM support?
It does. (as I've indicated above - and as others have indcated in this thread)
I passed the "acpi=off" option, then ran "apm -s" to which I was greeted with "No APM support in kernel."
Maybe your laptop doesn't support APM? I guess you can check 'dmesg' or /var/log/messages and look for APM errors.
Satish
On Tue, Dec 21, 2004 at 11:44:20AM -0600, Cam Desautels wrote:
What advantage is gained from turning ACPI off?
This is switching a laptop to APM for a power managment. For some laptops this is exactly what doctor prescribed and for other this is an instant killer. Depends really on your BIOS, and what kind of bugs are hidden there, so it is hard to call that "advantage".
Newer models tend to lean towards ACPI but you still _may_ have working APM. ACPI is big and convoluted beast and BIOS writers are not famous for a quality of their code. OTOH I have seen laptops where APM is still nominally there but you definitely do not want to use it.
Michal
On Tue, Dec 21, 2004 at 12:23:09PM -0500, Alan Cox wrote:
I do "acpi=off"
At least on older laptops even those that think they can do ACPI its generally a win. On newer boxes I'm just running the cpu speed daemon and a 100Hz kernel rather than the FC3 kernel.
That's just what I needed. Thanks all who answered.
Dave
Hello,
I have a Thinkpad T40, I am alos using acpi=off. I couldn't face the pain of trying to configure ACPI to work the way APM did...
Keith.