ubuntu_demon wrote: > Since it's currently impossible to recommend to turn laptop_mode on by > default I'm currently recommending this to people who are heavily affected : > * use apm 128 while on battery (most head parks, best protection from bumps, > lower power usage) > * use apm 254 while on AC (no protection from bumps,no head parks,best > performance,increased heat) > > The biggest reason to do so would be to protect the harddisk from bumps. > Even if the laptop is used on battery everyday for four hours the > Load_Cycle_Count would have to increase with 137 per hour to be able to > reach 600.000 within three years of usage. Most people don't see their > Load_Cycle_Count increase that fast (although some might). Most people > don't use their laptop for four hours on battery each day. Those people > who are afraid they will still reach the maximum Load_Count as specified > by their manufacturer within three years of usage do need to tweak the > "apm number while on battery".
OK, I see how the math stacks up, and I agree. In that case the shock protection probably outweighs the HD wear from the parking, even when laptop mode is not enabled. > This won't interfere with people who are using laptop-mode since laptop- > mode doesn't touch apm but only spindown. Not by default, but be aware that it _can_ be configured to configure APM as well. That's why, in the acpi-support solution for Debian, I added a check that laptop-mode.conf is configured to not touch APM. If laptop-mode.conf is configured to do APM, acpi-support leaves APM alone and lets laptop-mode-tools handle it. > In my humble opinion you should consider doing something similar in > acpi-support. I'll definitely consider adding a switch to -B 128 on battery. However, I'll have to do some calculation. I know of some laptops that have 9-hour battery lives, and on those laptops the math could be quite different! > $sudo install 99-hdd-ugly-fix.sh /etc/acpi/suspend.d/ (This one's not needed BTW.) -- High frequency of load/unload cycles on some hard disks may shorten lifetime https://bugs.launchpad.net/bugs/59695 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
