3500U laptop 0.4 Ghz when on battery
- Thread starter biostud
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- Feb 27, 2003
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mikeymikec
Lifer
- May 19, 2011
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I don't normally install any extra Lenovo software on Lenovo laptops (I give them all a clean Windows install then drivers only), but it might be worth checking whatever you have installed for any "energy saving" settings.
The only other reason I can think of that would cause a laptop processor to clock that low is if the CPU fan had failed, I saw that once on a Lenovo laptop with a Core i3-6006. If it's happy to clock up while on the mains then it can't be the fan.
The only other reason I can think of that would cause a laptop processor to clock that low is if the CPU fan had failed, I saw that once on a Lenovo laptop with a Core i3-6006. If it's happy to clock up while on the mains then it can't be the fan.
- Feb 27, 2003
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I've seen people with similar problems, but as it clocks normally when on power I doubt it is heat related.
- Feb 27, 2003
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Just booting up the computer. Which takes forever @ 0.4Ghz.
When looking at ressorce manager it simply goes from 0.4 GHz to 2.6-3.0Ghz when plugging in the cord and back to 0.4 when I unplug it.
- Feb 27, 2003
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It's an old laptop +3 years, I already went into the BIOS, and no interesting options to change.
In2Photos
Platinum Member
- Mar 21, 2007
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No, a colleague got the laptop exchanged about a year ago because he was experiencing slowdowns, and I've had it lying around as a spare computer students can borrow if their computer is in for reparation. I just had to use it myself for a task and then tried to look into why it felt so sluggish and found out why.
In2Photos
Platinum Member
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Gotcha. It's wild that there are no real fixes mentioned anywhere on the web. I agree with some others that believe it may be a battery capacity issue. Maybe try and run this battery report built into Windows?
Laptop Battery Testing Tool
FWIW - After reading Bikerpete’s post, I ran it on my laptop without problem. Laptop was plugged in at the time. You get no error message? When I ran it, the file was placed in a not much used location, directly in \users[username]. FWIW #2 - Not, that it will help, you can change the report...
community.spiceworks.com
mikeymikec
Lifer
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Throw in a Linux live CD/USB and see whether the problem occurs with that? Alternatively, do a quick Windows install onto a spare drive (I'd recommend 11 just so it has enough drivers without needing to install anything), don't bother connecting it to the Internet.
My bet is Lenovo software doing weird things.
My bet is Lenovo software doing weird things.
mindless1
Diamond Member
- Aug 11, 2001
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Did you do this?
I realize you stated it takes forever to boot, suggesting lower speed from the start, but perhaps it just takes forever to finish booting once the processor speed is stepped down?
What if you put it under full load, like running Prime95, does it not step up frequency then?
If you don't have a Lenovo app installed to manage power, what if you install one (if you can find one), and see if that allows changing this behavior? How about a bios update?
Last edited:
- Feb 27, 2003
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Yes, I've tried max performance and min CPU frequency to 50% on battery, it still drops to 0,4 as soon as the cord is unplugged.
I've sent it up to our IT guy he said he might have a battery he could swap from another old laptop.
mikeymikec
Lifer
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A laptop clocking down the processor because of a faulty battery would be a new one on me; not saying it's 100% wrong, I would just be very surprised if it was a thing.
- Feb 27, 2003
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Yeah, could be software glitch somewhere reducing CPU clock to 0.4Ghz on battery, no matter what.
Setting CPU profiles
To set the CPU power profile between performance and powersave, you can use the cpupower command provided in kernel tools.
sudo cpupower frequency-set -g performance
Where the -g is a power governor, the most common being 'performance', 'powersave' and 'ondemand'. Performance will turbo the CPU and run at max clock if it can. Powersave will try to drop the clock speed to save power, and ondemand is a mix, where the clock only ramps up if needed.
https://wiki.tonytascioglu.com/reviews/lenovo_thinkpad_e495
To set the CPU power profile between performance and powersave, you can use the cpupower command provided in kernel tools.
sudo cpupower frequency-set -g performance
Where the -g is a power governor, the most common being 'performance', 'powersave' and 'ondemand'. Performance will turbo the CPU and run at max clock if it can. Powersave will try to drop the clock speed to save power, and ondemand is a mix, where the clock only ramps up if needed.
https://wiki.tonytascioglu.com/reviews/lenovo_thinkpad_e495
mikeymikec
Lifer
- May 19, 2011
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Another thing I would consider checking is the Lenovo Vantage software. Usually in my experience it's a culprit because it gobbles CPU time like no tomorrow, but I wonder if there might be some "intelligent" power-related setting in there causing your problems.
Yes but it could easily run Linux. Running from a live CD was one of my favorite ways to differentiate between hardware and software issues.
If a problem persists with 2 different operating systems you most likely have a hardware or firmware issue.
If your system runs fine on Linux but not Windows you likely have a software or storage issue...
Nothing has an optical drive anymore but the same thing can be accomplished with a USB drive.
mikeymikec
Lifer
- May 19, 2011
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+1 live cd - I once diagnosed a faulty touchpad in a laptop where Windows wasn't giving me anything useful and just liked to crash randomly.
With Linux, one look at dmesg pointed out that something in touchpadsville was fishy.
With Linux, one look at dmesg pointed out that something in touchpadsville was fishy.
- Feb 27, 2003
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Maybe I'll give it a try when I return after my four weeks of holidays
The suspense will kill some of us in the meantimeMaybe I'll give it a try when I return after my four weeks of holidays
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