Nexus 7 got SLOW


Recommended Posts

My originally quite snappy Nexus 7 has gotten extremely slow. Page swipe are very slow and so is bringing up the apps screen and swiping through it. Could this be a byproduct of rooting and if so can I unroot it? Can something else be causing it?

Link to comment
https://www.neowin.net/forum/topic/1131730-nexus-7-got-slow/
Share on other sites

Upgrading to 4.2 noticeably decreased the performance on my Nexus 7. Even after reflashing and having 6GB+ space free, it really lags.

This. Though not all the time, my Nexus will have large lag spikes at certain times that wasn't present at all on 4.1.2.

Though it could be an app that you have just installed is taking too many resources and your Nexus is struggling, like Halfalive mentioned some widgets can have massive effects on performance.

this is due to a TRIM bug in 4.1.1.

Look for an app "ForeverGone" on the play store...and run it...it will take some time to complete (it will fill up your empty space). This will reset the TRIM related errors.

4.1.2 tried to fix this, though it's still not properly fixed in 4.2.1 (slight stutter at times, which is fixed by rebooting). Use this app to fix it for the time being: https://play.google.com/store/apps/details?id=com.grilledmonkey.lagfix&hl=en_GB

This will have to do till google fixes this ****-up.

The device has only 1/2 of it's internal memory used so it's not that. I also run the same widgets I have on my Nexus 10 and it's not this slow. I did remove my clock/weather widget but it did not help. I will that ForeverGone app..

this is due to a TRIM bug in 4.1.1.

Look for an app "ForeverGone" on the play store...and run it...it will take some time to complete (it will fill up your empty space). This will reset the TRIM related errors.

4.1.2 tried to fix this, though it's still not properly fixed in 4.2.1 (slight stutter at times, which is fixed by rebooting). Use this app to fix it for the time being: https://play.google.com/store/apps/details?id=com.grilledmonkey.lagfix&hl=en_GB

This will have to do till google fixes this ****-up.

I installed and ran ForeverGone and it indeed does seem to have restored my device speed, thanks V9! The only problem is that now when i try to add a widget back i get an error "launcher has stopped".

I installed and ran ForeverGone and it indeed does seem to have restored my device speed, thanks V9! The only problem is that now when i try to add a widget back i get an error "launcher has stopped".

Did you let forevergone run completely? (i.e. did it delete the dummy blank file that filled up the space)

Run https://play.google.com/store/apps/details?id=com.grilledmonkey.lagfix&hl=en_GB as well, and then reboot your tablet.

Also, what Android version are you on?

Yes it ran a long time filling up used space and then it deleted it in about half a second. Android 4.2.1

I previously rooted my device and now Lagfix is saying "ROOT access not granted". Do I need to do it again (if I remember how lol)?.

Well, I am backing up and starting the root process over again. I really want to use that Lagfix tool. I have Nexus 4,7, and 10 and the 7 seems to be the only one (so far) suffering from this problem.

^ had you updated it since you last rooted? if so when on the stock rom you lose the root after each update if you don't have a root keeper app. this should do the trick https://play.google....3RrZWVwZXIiXQ..

I don't think I updated since that root but it's possible that I did 4.2.1 after it was rooted. I did do it last night though. By it wiping my data, do I even need lagfix anymore? lol

Nothing is wrong with your device. This is normal operating behavior of the Nexus 7.

This IS NOT the normal behavior of the Nexus 7 so hope no one fell for this garbage.

A lot of the time instead of fooling around with what is causing the lag, I will do a system restore and restore my data a little at a time until I find out what was causing the issue.

This topic is now closed to further replies.
  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Posts

    • Microsoft finally admits its default Windows 11 25H2, 24H2 action broke key legacy component by Sayan Sen Microsoft last week released Windows 11 KB5094126 and KB5093998 as the latest Patch Tuesday updates. Following that the company also published the accompanying dynamic updates under KB5094149, KB5095971, and KB5094156. So far the company has acknowledged two known issues that have popped up after the release which include bugged-out Office apps as well as the Recycle Bin; though there could be more at play too. Speaking of bugs and issues, Microsoft seems to have finally acknowledged a problem that probably has been around for close to a year. That's because back in July of 2025 the company made a default change to the latest Windows 11 versions, wherein it switched to JScript9Legacy on Windows 11 24H2 and later releases. Hence following the release of version 25H2 in October 2025, JScript9Legacy also remained default-enabled. As a result there has been a compatibility issue ever since then. For those wondering, by switching to JScript9Legacy Microsoft intended to improve the security of modern Windows PCs by reducing vulnerabilities tied to legacy scripting like cross-site scripting (XSS), among others. XSS exploits can allow cyber-attackers to attach malicious code onto legitimate websites and use them to execute the code when a potential victim loads such a website. Hence the new JScript9Legacy engine enforced stricter execution policies and improved object handling, which should help mitigate such attacks. Microsoft today has published a new support article detailing the problem. Neowin spotted it while browsing. The company says that JScript global definitions and execution context may fail to persist across scripts, potentially breaking older dependent apps and web-based components that relied on this legacy behavior. In the article Microsoft has confirmed that the issue stems from its move away from the older jscript9.dll engine in favor of jscript9legacy.dll. As mentioned above, while the newer engine was designed to address vulnerabilities and strengthen security it also changes how JScript handles execution context. As a result functions and definitions loaded by one script could no longer remain available to subsequent scripts once execution ended. The company notes that some applications worked correctly on earlier Windows versions because the older JScript engine automatically retained global definitions and execution state between scripts. Under the newer model though that behavior is disabled by default causing certain legacy workloads and polyfill-dependent scripts to fail. Microsoft says it addressed the problem via the KB5077241 update though the fix had not been enabled automatically in the following updates. As such admins must explicitly turn on persistent JScript execution context using a Registry setting that the tech giant shared today. The configuration can be applied to individual processes or system-wide through the FEATURE_ENABLE_PERSISTENCE registry key. The steps have been outlined below: Run the following command to create the feature control registry key: reg add "HKLM\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_ENABLE_PERSISTENCE" Under this key, create a new DWORD (32-bit) value. Configure the value as follows: To enable persistence for specific processes only: Set the value to 1 for each target process name. To enable persistence for all processes: Add * as the key name and set its value to 1. You can find the official support article here on Microsoft's website.
    • The possibility that milk gathers back into a glass implies that gravity can be 'reversed'.
    • VidCoder 12.20 by Razvan Serea  VidCoder is a DVD/Blu-ray ripping and video transcoding application for Windows. It uses HandBrake as its encoding engine. Calling directly into the HandBrake library gives it a more rich UI than the official HandBrake Windows GUI. VidCoder can rip DVDs but does not defeat the CSS encryption found in most commercial DVDs. You’ll need the NET 8 Desktop Runtime. If you don’t have it, VidCoder will prompt you to download and install it. The Portable version is self-contained and does not require any .NET Runtime to be installed. You do not need to install HandBrake for VidCoder to work. Feature list: Multi-threaded MP4, MKV containers Completely integrated encoding pipeline: everything is in one process and no huge intermediate temporary files H.264, H.265, MPEG-4, MPEG-2, VP8, Theora video Hardware-accelerated encoding with AMD VCE, Nvidia NVENC and Intel QuickSync AAC, MP3, Vorbis, AC3, FLAC audio encoding and AAC/AC3/MP3/DTS/DTS-HD passthrough Target bitrate, size or quality for video 2-pass encoding Decomb, detelecine, deinterlace, rotate, reflect, chroma smooth, colorspace filters Powerful batch encoding with simultaneous encodes Customizable Pickers to automatically pick audio and subtitle tracks, destination, titles and more Instant source previews Creates small encoded preview clips Pause, resume encoding VidCoder 12.20 changes: Updated HandBrake core to 1.11.2. Download: VidCoder 12.20 | 47.0 MB (Open Source) Download: Portable VidCoder 12.19 | 89.3 MB Link: VidCoder Home Page | Github | Screenshot Get alerted to all of our Software updates on Twitter at @NeowinSoftware
    • Too soon, I'm still not over this death!
  • Recent Achievements

    • Week One Done
      Jordan Smith earned a badge
      Week One Done
    • Reacting Well
      BizSAR earned a badge
      Reacting Well
    • First Post
      AndreaB earned a badge
      First Post
    • Week One Done
      Huge Trailer earned a badge
      Week One Done
    • Week One Done
      Classifyskilleducation earned a badge
      Week One Done
  • Popular Contributors

    1. 1
      +primortal
      593
    2. 2
      +Edouard
      185
    3. 3
      PsYcHoKiLLa
      76
    4. 4
      Michael Scrip
      73
    5. 5
      Steven P.
      66
  • Tell a friend

    Love Neowin? Tell a friend!