> Of course most of the first points are things that the user just needs to do > himself (power off his machine, choose the right dimension for the work he's > doing etc). > > From the pure system ones i know that we at least already use the ondemand > by default as soon as the CPU supports it, so we should be fine there. > > Network card speeds and harddisk spindowns is a bit tricker imo, though we > probably could enable a higher powersave mode for harddisk by default at > least in case a user wants to save power. Some of this is/will be addressed > by the tuned i'm working on which monitors the usage of network and harddisk > devices and dynamically adapts the settings to the current use. It also depends on the actual switch settings as well. If the switchport is pegged at 100/Full there's no way we can change the NIC settings because we then lose network altogether. In a server environment this is common for various reasons (I work in for a enterprise hosting company with tens of thousands of switch ports, probably 80-90% are pegged at a specific setting). > Laptop mode and a higher value for dirty_writeback_centisecs, there i'm > personally torn a bit myself. I personally do use it on all my machines > (laptop and desktop), but i can understand people who are a bit paranoid > about their data integrity not wanting to have that by default. But i'd > personally be all for going that way. Also there are settings I believe that are much more optimal for SSDs so there should probably be something that allows for that as well and that detects Disk vs SSD. > In regard to relatime from what i've found so far we seem to be doing that > already by default it seems, though i'd like to have that verified. > > Then disabling CD-ROM polling is definitely something for the ServerSIG, but > on a default Desktop i think the user experience would suffer if we would do > that by default. I was under the impression that the reason HAL polls for CD drives is for old and/or buggy CD drives that don't support the media change functionality or at least something to that effect. Is that still an issue with older drives? Also there's a bug where HAL still polls when there's no CD drive. See RHBZ 464104 it polls the SD card in my eeePC 901. > Enabling USB autosuspend looks like a good candidate for being a default > though. I've used it on quite a few Fedora 10 machines around here and > haven't experienced any problems so far, so it seems to have matured enough > by now from what i can see. How do you enable that in Fedora 10? > Last but not least the dpms off, i think that should definitely be part of > the Desktop screensaver defaults, especially if you look at how much power a > modern LCD display eats when it's only dimmed down to black. And for server too? If there's no screen attached to a VGA port does dpms off still save power on a video chipset by turning off stuff? Also I've seen some discussion on turning off one screen when its not in use (like watching a video on one screen and turning off the other in a dual screen env). Peter -- fedora-devel-list mailing list fedora-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-devel-list
