Si_ Posted May 8, 2009 Share Posted May 8, 2009 Hey, I've recently installed the RC on a notebook previously running XP. I've noticed though that on XP I would get ~3hrs battery life, and on windows 7 i'll get an hour, if i'm lucky. I'm using the 'power saver' profile, so the screen is dimmed, aero is off etc, the processor is set to never go above 50% etc, but battery life is still unacceptably poor. For me this is a real deal breaker, I do a lot of work while not connected to AC so getting just 1hr out of a battery when I could get 3 is not going to happen. Am I missing something here or is windows 7 really this bad on notebooks? Link to comment Share on other sites More sharing options...
Avlor Posted May 8, 2009 Share Posted May 8, 2009 That's strange, for me 7 bumped up battery life from 3-3.30h under XP to 4.5-5h, which was awesome to find out. Maybe you should let it run for several days, to let it index and prefetch everything so that it would stop using hdd while on battery.. Link to comment Share on other sites More sharing options...
raider360 Posted May 8, 2009 Share Posted May 8, 2009 That's strange, for me 7 bumped up battery life from 3-3.30h under XP to 4.5-5h, which was awesome to find out. That makes me wanna try W7 under my HP laptop :) Link to comment Share on other sites More sharing options...
Si_ Posted May 8, 2009 Author Share Posted May 8, 2009 Hmm using a HP 6910p here and it is just so poor. The hdd is doing little to nothing whilst idle, so maybe it has done all its indexing and whatnot, but is still draining battery like it's going out of fashion. Is there anything I can check?? Saying that, it does seem to think it's charging excessively fast, e.g charged 35% in under 15mins, which usually is reported slower under XP. Perhaps windows 7 thinks the battery is much lower capacity than it is? Link to comment Share on other sites More sharing options...
Avlor Posted May 8, 2009 Share Posted May 8, 2009 Saying that, it does seem to think it's charging excessively fast, e.g charged 35% in under 15mins, which usually is reported slower under XP. Perhaps windows 7 thinks the battery is much lower capacity than it is? Try installing Everest and checking battery capacity in Power Management section, when the laptop is fully charged.. However, that would be very weird if usable battery capacity depended on the OS Link to comment Share on other sites More sharing options...
hdood Posted May 8, 2009 Share Posted May 8, 2009 You could open a command line and run "powercfg /energy /output test.html" and then see if there's anything interesting in test.html. Link to comment Share on other sites More sharing options...
Si_ Posted May 8, 2009 Author Share Posted May 8, 2009 got a few of these: USB Suspend:USB Device not Entering Suspend The USB device did not enter the Suspend state. Processor power management may be prevented if a USB device does not enter the Suspend state when not in use. Platform Power Management Capabilities:PCI Express Active-State Power Management (ASPM) Disabled PCI Express Active-State Power Management (ASPM) has been disabled due to a known incompatibility with the hardware in this computer. Power Policy:802.11 Radio Power Policy is Maximum Performance (Plugged In) The current power policy for 802.11-compatible wireless network adapters is not configured to use low-power modes. Link to comment Share on other sites More sharing options...
excalpius Posted May 8, 2009 Share Posted May 8, 2009 Ah those would do it. Some of your biggest power drainers aren't standing by at all! You're going to need updated drivers. :) Perhaps in the RTM...as that's just the sort of thing that will be added before release in July. Link to comment Share on other sites More sharing options...
dafin0 Posted May 8, 2009 Share Posted May 8, 2009 You could open a command line and run "powercfg /energy /output test.html" and then see if there's anything interesting in test.html. thanks for that command line very usefully and great to know Link to comment Share on other sites More sharing options...
Udedenkz Posted May 8, 2009 Share Posted May 8, 2009 Speaking of Power Management - the CPU % on battery option doesn't do anything on my laptop - why ain't it greyed out? Link to comment Share on other sites More sharing options...
blunden Posted May 8, 2009 Share Posted May 8, 2009 On my laptop the BIOS didn't fully support the power functions before I flashed it with the latest BIOS. Doesn't seem to be the problem here but I thought it might be good for other people to consider. :) Link to comment Share on other sites More sharing options...
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