11-27-2021 12:29 AM
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  1. ironass's Avatar
    [UPDATE 11/24/21] See post #15

    It seems it is not U.S. users imagination, there really is a lag bug on their Snapdragon models on their Android 12, One UI 4, rollout.

    The good news is that Samsung have promised to fix it in the next update.

    This issue does not affect the global, Exynos, devices.

    "One such bug breaks the adaptive refresh rate on the Galaxy S21 series and locks the display to 60Hz, leading to a janky scrolling experience in apps."

    See the full Androidpolice article...

    Samsung will fix Galaxy S21's Android 12 UI lag in a future update
    ABOSWORTH007 likes this.
    11-22-2021 11:53 AM
  2. ABOSWORTH007's Avatar
    This is good to know. They never should have released it like this. Glad the fix is in the works. Hopefully we have it in the next couple weeks.
    11-22-2021 12:05 PM
  3. Gary02468's Avatar
    The good news is that Samsung have promised to fix it in the next update.
    I don't really see any promise by Samsung, or any mention of the "next" update. There's merely a statement by a beta forum moderator that they've alerted Samsung devs to the continuing problem (which was also present in the beta releases). I think I'll hold off on updating until that and a few other reported problems have actually been fixed.
    11-22-2021 12:15 PM
  4. htcrazy's Avatar
    There's really is a lag especially scrolling the Google Discover feed. I left the Android 12 beta and then the lag went away. Downloaded the release of Android 12 this morning and the lag is back. Factory reset for the second time and the lag is still there.
    11-22-2021 12:29 PM
  5. Grabber5.0's Avatar
    There's really is a lag especially scrolling the Google Discover feed. I left the Android 12 beta and then the lag went away. Downloaded the release of Android 12 this morning and the lag is back. Factory reset for the second time and the lag is still there.
    Ugh
    11-22-2021 01:11 PM
  6. o4liberty's Avatar
    No lag at all on my s21 5g at all. Downloaded the Android 12 update after the last beta.
    11-22-2021 03:24 PM
  7. notforhire's Avatar
    This was a prominent bug during beta4. Not everyone experienced it, but it was prevalent. Looks like Sammy was more committed to the release date than to getting it right. I am still in beta and have set my phone to refresh at 60 hz, just to bypass the stutter. Someone from the beta downgraded just today to 3.1. It's a mess (unless you're like o4liberty without any issues, lol).
    11-22-2021 03:51 PM
  8. htcrazy's Avatar
    Problems solved. Switched from Nova to stock launcher. No more lag in Discover feed. Wallpaper is now fixed too. You can now use custom icons with the stock UI so no real need for me to use Nova anymore.
    11-22-2021 03:53 PM
  9. jettie1767's Avatar
    I see it on my S21U and S21. Stuttering during scrolling thru a web page.
    suzolin13 likes this.
    11-22-2021 05:59 PM
  10. Grabber5.0's Avatar
    Is this just stuttering, not lagging sleeping down while scrolling?
    11-22-2021 06:04 PM
  11. jlost's Avatar
    https://www.sammobile.com/news/galax...ming-soon/amp/

    It's when you lift your finger that the lag is present, not when the finger is on the screen. Very weird bug lol
    11-22-2021 06:12 PM
  12. htcrazy's Avatar
    Yes it is weird and very annoying. It's definitely a Samsung problem as my Pixel 6 Pro also on Android 12 has no such problem and is buttery smooth.
    11-22-2021 06:27 PM
  13. GoNavy79's Avatar
    The last update fixed the stuttering on my s21ultra. SakiTech reported the same fix in one of his tubes.
    11-22-2021 06:41 PM
  14. htcrazy's Avatar
    11-22-2021 07:10 PM
  15. ironass's Avatar
    Samsung have begun rolling out a new update to fix the lag on U.S. models.

    "The new build is G99xUSQU4BUK9 (where "x" is different according to which S21 family member you have), and it's coming to replace the previous G99xUSQU4BUK7 on US carrier models. For now, the new build showed up at Verizon, but we expect it to reach the other carriers' units very soon."

    Source... GSMArena

    Source... SamFrew
    11-24-2021 04:46 AM
  16. Gary02468's Avatar
    Samsung have begun rolling out a new update to fix the lag on U.S. models.
    Except it reportedly doesn't, which is a bad sign: https://www.reddit.com/r/GalaxyS21/c...eb2x&context=3

    Samsung has been wrestling this bug through several firmware versions now, starting with the beta. They don't seem to know how to fix it.
    notforhire likes this.
    11-24-2021 06:16 AM
  17. htcrazy's Avatar
    Nothing yet for U. S. unlocked ; still on BUK7.
    11-24-2021 08:34 AM
  18. jettie1767's Avatar
    I installed this update yesterday but the lag/stutter when scrolling is still there.
    11-24-2021 09:10 AM
  19. jskinvest's Avatar
    Got the update a couple days ago on my Verizon S21+. Some apps stay on 120HZ while others still revert back to 60HZ while scrolling. I would say it affects about half of my apps.
    11-25-2021 05:39 AM
  20. alarsen77's Avatar
    Got the update a couple days ago on my Verizon S21+. Some apps stay on 120HZ while others still revert back to 60HZ while scrolling. I would say it affects about half of my apps.
    I got the update as well and I also notice that in chrome and the Amazon app if I scroll slowly it is 120hz but if I scroll quickly it drops to 60hz where as in the phone settings and Tapatalk it stays 120hz regardless of scroll speed.
    11-25-2021 11:58 AM
  21. jskinvest's Avatar
    Got the update on 11/23 on my Verizon S21+. Some apps stay on 120HZ while others still revert back to 60HZ while scrolling. I would say it affects about half of my apps.
    11-26-2021 05:23 AM
  22. Gary02468's Avatar
    Got the update on 11/23 on my Verizon S21+. Some apps stay on 120HZ while others still revert back to 60HZ while scrolling. I would say it affects about half of my apps.
    What I've found is that if I start a scroll by quickly flicking my finger, then the refresh rate behaves as your describe. But if my finger remains in contact with the screen, and in motion (either in one direction or back-and-forth), for at least half a second before breaking contact with the screen, then the refresh rate stays at 120 Hz as the scrolling continues. That's on a G998U1 with BUK7, but I'd guess it'll apply to BUK9 as well.
    11-26-2021 06:36 AM
  23. htcrazy's Avatar
    If anyone is interested, Galaxy HZ app apparently fixes lag by locking refresh rate.

    https://forum.xda-developers.com/t/a...-more.4181447/
    11-26-2021 06:50 AM
  24. Gary02468's Avatar
    If anyone is interested, Galaxy HZ app apparently fixes lag by locking refresh rate.
    Be careful, though. This is a workaround, not a fix. Its disadvantage is that if you lock the rate at 120 Hz, you pay the price of significant extra battery drain (the point of adaptive refresh is to avoid that problem). Or if you lock the rate at 60 Hz, then you entirely abandon the smooth refresh rate that was one of the phone's major selling points. Some people may prefer one of those tradeoffs, but it's important to mention what tradeoffs there are.
    11-26-2021 07:51 AM
  25. bhatech's Avatar
    By the time the useless US carriers certify the new BUK9 update, it'll be another month lol. It's so hard for Samsung to push updates on their own timeline because they have to bend over to the US carriers including the US unlocked they sell directly.
    ironass likes this.
    11-26-2021 12:53 PM
32 12

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