Hi,
So I have the Lenovo Yoga Tab 3 Plus with the latest official Android version 7.1.1 (All stock, no unlocks of any kind).
Since a few months ago I started noticing that my tablet started lagging a lot, to the point that even Netflix would stutter or struggle to play anything. After a lot of debugging and fiddling I finally found out that only half of the CPU cores are working. The tablet has a 8 core CPU, from which 4 are slower (low power) and the other 4 are faster. After rebooting the tablet, all 8 cores are working fine, but when I turn off the screen for a few minutes and then turn the tablet back on, only 4 cores work (the slow ones), the fast CPU cores are never used and appear as offline or just 0%. When the tablet is lagging I can see that the 4 slow CPU cores are all maxed out at 99-100% while the fast 4 cores are still offline. Restarting the tablet fixes the issue till you turn off the screen again.
Does anybody know what is going on here? I would suspect the battery, but it holds fine for at least 2 to 3 days without charging, when the device is in standby and/or lightly used, so I think the battery is fine. Is this Lenovo's way to force you to buy a new tablet, by disabling half of the CPU cores via software!? Or could there be something else going on?
Anybody has experienced the same issue here?
Related
Hi guys.
Edit : I am running fully stock, non-rooted and OTA updated Kit Kat 4.4.2
I noticed that a high Android OS usage and wake lock (in my case) comes from the cpu Governor locking all cores to 2.0-2.3 GHz despite nothing happening on the phone. I checked this using the system monitor tool. I have screenshots added.
The problem is that I can't see what apps are causing the governor to never make the other 3 cores go offline. When I check "Top apps" everything is at 0% cpu usage. What is causing the cores to never go offline and stay locked at 2.0GHz+ and drain battery?? It is only when this happens that I get high Android OS usage. A reboot fixes it, but it happens randomly. When I feel that my battery is draining badly, I check my cpu in system monitor and see all cores online even when idle. I just don't get it.
I'm thinking it may have something to do with dashclock/BBS or some combination, as every time this happens, the BBS add on in dashclock shows 0% drain (so it seems broken when it happens).
Please help!
Sent from my SM-N9005 using xda app-developers app
EddieN said:
I noticed that a high Android OS usage and wake lock (in my case) comes from the cpu Governor locking all cores to 2.0-2.3 GHz despite nothing happening on the phone. I checked this using the system monitor tool. I have screenshots added.
Click to expand...
Click to collapse
Hello. Have you found a solution to this problem? I thing I have something silmilar, although in my case the IDLE cores stay at 300MHz and they do not enter offline as they should. I have a rooted phone with original 4.4.2 firmware and Xposed framework installed, but it doesn't seem to be a problem (the cores get stuck after some time).
this is caused by samsungs dvfs (google it for more information). just download and enable the dvfs disabler module from xposed framework
I have xposed enabled, dvfs disabler its enabled.
My minimum 300mhz became 1.19-2ghz, so cpu is stuck.. Onlu one core usually. I find out one app that does that, camera. I enter camera app then exit, cpu minimum core is 1.95ghz and stay there always, till restart.
What rom do you have? I'm on xxuend3
And on what governor? I'm on interactive.
And usually if you move cpu minimum /maximum sliders, cpu became unstuck.
So you have few cores stuck, move sliders up and down and stuck became unstuck
Regarding the top apps not showing, I've found the usage reporting on the device to be entirely broken.
I've had it report, in 6 seperate apps, that Android was using 25%... whilst I'd been playing Oh Edo! Towns for 6 hours straight. It listed that game, which is quite heavy, as 2%.
No way in hell that's accurate.
25% in deep sleep, yes. There's nothing else running, so 25% of 1% per hour for idle processes makes sense. But not during gaming.
Sent from my SM-N9005 using Tapatalk 2
Hello! About 1 day works well for me on the phone, then the middle two seeds get stuck 1,9MHz. Only a restart helps ...
Kernel bugs??
Im on skyhigh kernel. On this one cpu wont stuck.
I found that Camera app makes cpu stuck at maximum clock, like 2.2 or more. The fix, restart phone or use cpu sliders and move them a bit, then cpu became unstuck. Use android tuner, faux, etc for moving cpu clock sliding
Note 3 rooted knox 1, my last Samsuck crap. I want freedom. Stay away from Samsuck!
I found an small annoyance. When i wake up the phone i see an lag... Sometimes its about 5sec,sometimes lower or more. How can i fix this? Tried to raise cpu clock on touch... The same
Note 3 rooted knox 1, my last Samsuck crap. I want freedom. Stay away from Samsuck!
ISSUE 1:- Note 3 loses two cores. Core 2 & 3 stopped.
Ive had my galaxy note 3 for about 2 months now and this has only just happened this once but for some reason the snapdragon 800 dropped 2 cores randomly.
I didnt even have power saving mode on or any sort of saving mode. I use to turn on the power saving mode when low on juice but its happening even with it turned off.
I checked CPU Z and found core 2 & 3 completely stopped.
Before the 2 cores dropped I was getting 23K on quadrant and then when the 2 cores dropped I was only getting 14K.
Has anyone else experienced this issue or is this meant to happen? The only way to fix is a reboot. It has happened twice in a week now.
ISSUE 2:- Green hue on the screen randomly.
Yesterday while on a call on speaker mode I noticed a green hue covering the entire screen. Everything was kinda greenish. I see there are other users complaining the same but could not find a satisfactory answer anywhere for this problem.
Any help will be highly appreciated...!!
Hi,
I'm experiencing some problems when using Android Auto. I think that my device is overheating.
Maps becomes very slow after about 30 minutes driving. Sometimes the phone is going very hot and is unresponsive during few minutes. I checked the cpu temp after a drive today and got values close to 60c. I'm running LOS 14.1 right now. I was using CM 13 previously and the heating issue wasn't so huge.
So I wonder if anyone else is running Android Auto successfully on this device ?
update : I disabled thermal throttling using Kernel Aduitor. Android Auto is running perfectly fine now. Phone is heating a lot (80c for CPU but 25c for battery) What is the thermal throttling ? Is it a kernel feature ? Is it the same as thermald ? Is it tunable ?
marcjero said:
Hi,
I'm experiencing some problems when using Android Auto. I think that my device is overheating.
Maps becomes very slow after about 30 minutes driving. Sometimes the phone is going very hot and is unresponsive during few minutes. I checked the cpu temp after a drive today and got values close to 60c. I'm running LOS 14.1 right now. I was using CM 13 previously and the heating issue wasn't so huge.
So I wonder if anyone else is running Android Auto successfully on this device ?
update : I disabled thermal throttling using Kernel Aduitor. Android Auto is running perfectly fine now. Phone is heating a lot (80c for CPU but 25c for battery) What is the thermal throttling ? Is it a kernel feature ? Is it the same as thermald ? Is it tunable ?
Click to expand...
Click to collapse
I would be careful with turning that off. Thermal throttling basically checks how hot your phone's internal components get, and when they reach a dangerous level it forces the device to slow down.
Turning it off means that your device WILL work at hotter temps, but you risk damaging the CPU, screen, battery, etc.
The reason the phone was getting slow is due to 1. the screen being on all the time, 2. the GPS constantly updating.
The N4 wasnt meant for such tasks, so it overheats.
One solution: get a mount that sits on top of the airvents, so that cool air blows over it.
HubrisRev5 said:
I would be careful with turning that off. Thermal throttling basically checks how hot your phone's internal components get, and when they reach a dangerous level it forces the device to slow down.
Turning it off means that your device WILL work at hotter temps, but you risk damaging the CPU, screen, battery, etc.
The reason the phone was getting slow is due to 1. the screen being on all the time, 2. the GPS constantly updating.
The N4 wasnt meant for such tasks, so it overheats.
One solution: get a mount that sits on top of the airvents, so that cool air blows over it.
Click to expand...
Click to collapse
Well the screen is off with Android Auto. But of course the GPS is working. The battery temp stays low at about 25c. The screen is not hot. Only the back of the phone (the upper part close the camera) is getting hot. Thermald is still active and there is still a protection against battery overheating.
I really think that the Lineage kernel is too much aggressive regarding thermal throttling. I tried other kernels but unfortunately they slow down clocks too much when the screen goes off.
marcjero said:
Well the screen is off with Android Auto. But of course the GPS is working. The battery temp stays low at about 25c. The screen is not hot. Only the back of the phone (the upper part close the camera) is getting hot. Thermald is still active and there is still a protection against battery overheating.
I really think that the Lineage kernel is too much aggressive regarding thermal throttling. I tried other kernels but unfortunately they slow down clocks too much when the screen goes off.
Click to expand...
Click to collapse
Btw, there are some stupid gadgets you can buy on aliexpress to help with this issue. Like this weird phone stand with a fan behind it, https://www.aliexpress.com/item/Portable-3-in-1-Holder-Stand-Radiator-Mobile-Phone-Rings-Holder-2000-mA-Bracket-Power-Bank/32824399237.html?ws_ab_test=searchweb0_0,searchweb201602_3_10152_10065_10151_10068_10130_10344_10345_10547_10342_10343_10340_10341_10548_10192_10541_10540_10190_10307_10301_10303_10060_10155_10154_10056_10055_10539_10538_10537_10536_10059_10534_10533_100031_10103_10102_10142_10107_10324_10325_10084_10083_10179_10312_10313_10184_10314_10073,searchweb201603_25,ppcSwitch_2&btsid=ee6398e3-e7a6-4bd7-938c-34f6e0cdef52&algo_expid=21d9a156-0a93-470d-acbc-d807892ce6e8-0&algo_pvid=21d9a156-0a93-470d-acbc-d807892ce6e8 or just buy a holder than fits over the airvents in your car https://www.aliexpress.com/item/Anker-Air-Vent-Magnetic-Car-Mount-Highly-Adjustable-Phone-Holder-for-iPhone-SE-6-6s-7/32824593598.html?ws_ab_test=searchweb0_0,searchweb201602_3_10152_10065_10151_10068_10130_10344_10345_10547_10342_10343_10340_10341_10548_10192_10541_10540_10190_10307_10301_10303_10060_10155_10154_10056_10055_10539_10538_10537_10536_10059_10534_10533_100031_10103_10102_10142_10107_10324_10325_10084_10083_10179_10312_10313_10184_10314_10073-10102_10000902,searchweb201603_25,ppcSwitch_2&btsid=d12c851e-a69b-48e1-b282-0733c26584ae&algo_expid=ab74c295-fb60-418d-9e32-5e32f75bd993-0&algo_pvid=ab74c295-fb60-418d-9e32-5e32f75bd993
Yep, I have the same issue. I was originally using slickrom stable release, then switched to weeklies and the issue showed up. Slickroms is based on lineage, so switched to lineageos and I've been seeing the same problem. Haven't found a solution to this problem (using Android auto with nexus 4 and lineageos).
Hello guys,
I have a Xiaomi Redmi Note 4x with 4GB of RAM, 64GB storage and a Helio X20 CPU. The performance on the phone is great but the battery life is horrible. The battery gets drained on idle within a few hours. I just unplugged it from the charger and it lost 10% with turned off wifi and mobile internet. I literally only left it on the table and when I checked back it was 10% down...
I thought it might be the old battery, so I ordered a new original one from France, which looks and feels legit. After replacing the battery I kept having the exact same issues. No improvements at all. I have no idea whats going on. The battery life is only good when I'm in airplane mode, but then my phone is useless. I turned off GPS, sync, turned on the battery saver, I have even Greenify installed, disabled lots of background apps. Nothing helped. This is driving me crazy, because I cant go anywhere without my powerbank. The phone has a 4000mAh battery that dies within 3-4 hours.
Could it be possible that this is caused by MIUI or something in the background that is constantly connecting to the internet? Because the battery could last for days when I'm in Airplane mode. The phone has also a very long screen on time while in Airplane mode. I think it can last for hours with the screen turned on as long as the airplane mode is turned on. As soon as I connect to any kind of network the battery starts draining really fast.
Here is a small list of applications that I have installed on the phone:
Facebook Messenger (no FB app)
Edge
Spotify
Discord
Viber
Instagram
Firefox
Onedrive
Outlook
Ebay
etc.
I was thinking of flashing a custom ROM on it, but there are not many options. Unlike the Snapdragon Variant, my phone doesn't seem to be supported by many main custom ROM developers like Lineage. I don't even know how to look for a ROM, because most ROMs are for the Redmi Note 4 (without the "x"). Does anyone know if the Redmi Note 4x (MTK) is using the same chipset like a Redmi Note 4 (MTK)? Both have the same codename "Nikel".
Any help would be MUCH appreciated!
I don't trust anything with Facebook in the name and expecially messengers. Most of them suck a lot of memory and will constantly be checking on the Internet. I assume you have mobile data turned on. That in itself will pull down a battery especially if you have a lot of apps in the background that want to check in often and it looks like you do.
You can try to force stop some of those apps but some will restart theirselves almost immediately after a force stop. If you are rooted you could use Rom Toolbox or a similar app to 'freeze' them until you need them. You can also use an app like "4G (gigabyte) Ram Memory booster" to clear memory although some apps as I mentioned will come right back.
If you don't have all bars showing for your cellular your phone may be raising the power output levels accordingly and thus if you only have 1 or 2 bars your power being used can be many times higher for any apps that connect to the Internet.
You can also find apps that will prevent other apps from starting up until you open them. "Advanced Permission Manager" is a good one although it sometimes won't work on certain apps.
Hello, could someone help me to find the issue.
My Tab S5e has since it run completely empty a problem. Before it could use it 5-6 days per full charge. Now it stays for 1-2 days.
Could someone check the cpu frequnce on his S5e (maybe with the app "Device Info: System & CPU Info". How low is the lowest cpu freqence?
My S5e often is at 1700 MHz on the most cores.
I now installed lineageos 20 and the cpu is now clock down. But the short battery life stayed.
There are several other recent posts about this. No idea when it started, Samsung support seemed uninterested.