12-28-2012 07:49 AM
The last few days my Thinkpad T420 is acting a bit "funny", but it is not fun at all, actually I'm very worried because I only own this laptop since July and I paid a "small fortune" to get in the hope it will offer a lot of trouble-free computing years.
The last two days, while I operate the laptop on battery and while the battery is almost fully charged (> 95%) the laptop enters sleep mode (!!) , Then I turn it on again, I check the system logs, I see that the computer entered sleep mode, and reason is ... "battery" (!!) Why would that be?
The other "funny" thing is that yesterday I put my laptop to sleep fully charged (this is how I usually leave my laptop, I almost never shut it down, I prefer sleep mode for the benefits of it), then went to the movies, and when I got back after few hours I took the laptop out of my bag, it was really hot (!!!) all over it, I opened the lid , the laptop was still sleeping, I turned it on, I saw that the battery was drained down to 32%....
I checked the logs and I saw that the laptop had been awake, but couldn't find out why, then I check the logs back in time and I see that my laptop is waking up at random times in the middle of the night, like arond 4:00, 4:30, 5:00 am and is doing stuff while i'm sleeping.
Any idea what may have been causing this?
Both problems are really annoying and I'm very worried about both.
Is there a way to explicitly tell the laptop to never wake up unless a user's action is taken?
I checked the bios settings, I couldn't find anything like ACPI or wake-on events (only wake up on lan, which is obviosuly not the case because I never use a cable network).
any ideas and help will be much appreciated!!
12-28-2012 08:57 AM
Hey there afasias,
I can definitely see how this could be worrisome. To better assist, what OS are you currently are using on your T420? I assume you are currently operating underneath a version of Windows 7 considering your purchase time frame. I found some helpful information to take a look at to get a closer understanding to isolate what is causing it to wake up.
Stop the Mouse/UltraNav from waking up the PC
To Open CMD as an administrator:
1. Open the Start menu
2. Enter “cmd” in the search box
3. Then press the keyboard combination Ctrl+Shift+ Enter. (Hold down all three keys.)
4. Answer “Yes” when the UAC dialogue comes up.
Then try entering these commands:
powercfg –lastwake - The last device that woke up the system will be shown
powercfg -devicequery wake_armed -To find out which devices are enabled to wake up the PC
Following these things it is important to look at the Windows Power Manager, as well as the Lenovo Power Manager and verify the settings there. It may even be prudent to uninstall the Lenovo Power Manager, and download it fresh to your desktop and install it manually from there.
Hopefully all of this provides some guidance. I look forward to hearing back from you on your progress, Good Luck.
12-28-2012 12:30 PM
thank you for your reply.
Yes I am running Windows 7 Professional, (the ones that came with the PC)
I tried to follow your instruction on the mouse setting but I couldn't find the Power Management tab, it was not where it was supposed to be.
I tried the other commands in the command line prompt, I will try it again when this happens again.
This is the output of the device query command:
C:\Windows\system32>powercfg /devicequery wake_armed
Intel(R) 82579LM Gigabit Network Connection
The funny thing is that I don't use the Ethernet connection at all, only wi-fi.
Any other ideas?
Thanks in advance.
12-28-2012 01:10 PM
Just for the sake of trying, ensure that your Wake on LAN is disabled. Go into your BIOS -> Network -> Disable Wake On LAN. As well as within Windows 7. You can do this by:
Start > Settings > Control Panel > System > "Device Manager" tab
Find your network adapter(s), right click and select "Properties". In the "Power Management" tab, uncheck "Allow this device to bring the computer out of standby".
The last thing I could recommend you to check without knowing exactly what may be waking the computer up is to check your scheduled tasks and see if they are configured to wake from sleep.
Additionally, as a work around, have you tried seeing what results you may get out of a hibernation instead of sleep?
Thanks afasias, for following up.