I'm sad to discover that after working fine for the first 60 hours, my post-recall Note 7 is showing the same sound-feedback lag as my original Note 7 did.
Every few hours, my phone goes into a mode where there's a one or two second lag before the sound and vibration feedback for typing and for icon or button tapping. Even the (stock) phone-dialer keypad has a one or two second lag before it plays a tone when a key is tapped. However, visual responses (e.g. when typing) remain instantaneous--it's just the sound and vibration that lag.
After it goes into lag mode, the phone stays that way until it's rebooted. Then it's ok until the lag resumes in another few hours. I haven't identified any specific triggers. Here's a video that demonstrates the lag: https://vid.me/iYya. This video, in contrast, shows the phone when it's working properly, with no lag: https://vid.me/GF82.
The phone is completely stock (AT&T N930AUCS2APHE), no esoteric apps or settings, no package disabler, no third-party antivirus.
When the phone is in lag mode, the lag occurs in all apps, for multiple launchers (Google Now, Touchwiz), multiple keyboards (Samsung, Google), for all icon/button-taps as well as typing. The lag continues despite clearing the keyboard/launcher caches, closing all open apps, clearing the clipboard, using Device Maintenance|Optimize (which reports no problems), or engaging Airplane Mode or Power Saving. The lag also persists despite enabling Developer Options, turning off Window Animations, and forcing GPU rendering.
I booted into recovery and reset the system cache, but the lag still resumed a few hours later. I haven't tried a factory reset (the phone is less than two weeks old), but other users with the same problem have reported that factory reset does not fix it.
When the phone is in lag mode, if I turn off keyboard sounds but leave keyboard vibrations enabled, the keyboard vibrations no longer lag (until I re-enable the keyboard sounds). But with keyboard sounds and vibrations both enabled, the sounds and vibrations both lag.
When the phone is in lag mode, if I start using BT earphones, the lag stops (or rather is replaced by a uniform ~100ms lag, which is less annoying). When I disconnect my BT earphones and go back to speaker sound, the sound and vibration lag both resume. Wired earphones, unlike BT earphones, do not affect the lag at all.
When the phone is not in lag mode, the sound-feedback is instantaneous no matter how heavily the phone is being used, no matter how many apps I have open. When the phone is in lag mode, it lags even with all apps closed (but the vibration-feedback lag can be temporarily stopped by turning off the sound-feedback). So the lag is not caused by the phone being overloaded (and certainly not by bloatware, which imposes a negligible load). Rather, it's clearly a software bug, such as a memory leak in the sound-feedback drivers.
PLEASE use this thread only to discuss THIS SPECIFIC lag problem.
Every few hours, my phone goes into a mode where there's a one or two second lag before the sound and vibration feedback for typing and for icon or button tapping. Even the (stock) phone-dialer keypad has a one or two second lag before it plays a tone when a key is tapped. However, visual responses (e.g. when typing) remain instantaneous--it's just the sound and vibration that lag.
After it goes into lag mode, the phone stays that way until it's rebooted. Then it's ok until the lag resumes in another few hours. I haven't identified any specific triggers. Here's a video that demonstrates the lag: https://vid.me/iYya. This video, in contrast, shows the phone when it's working properly, with no lag: https://vid.me/GF82.
The phone is completely stock (AT&T N930AUCS2APHE), no esoteric apps or settings, no package disabler, no third-party antivirus.
When the phone is in lag mode, the lag occurs in all apps, for multiple launchers (Google Now, Touchwiz), multiple keyboards (Samsung, Google), for all icon/button-taps as well as typing. The lag continues despite clearing the keyboard/launcher caches, closing all open apps, clearing the clipboard, using Device Maintenance|Optimize (which reports no problems), or engaging Airplane Mode or Power Saving. The lag also persists despite enabling Developer Options, turning off Window Animations, and forcing GPU rendering.
I booted into recovery and reset the system cache, but the lag still resumed a few hours later. I haven't tried a factory reset (the phone is less than two weeks old), but other users with the same problem have reported that factory reset does not fix it.
When the phone is in lag mode, if I turn off keyboard sounds but leave keyboard vibrations enabled, the keyboard vibrations no longer lag (until I re-enable the keyboard sounds). But with keyboard sounds and vibrations both enabled, the sounds and vibrations both lag.
When the phone is in lag mode, if I start using BT earphones, the lag stops (or rather is replaced by a uniform ~100ms lag, which is less annoying). When I disconnect my BT earphones and go back to speaker sound, the sound and vibration lag both resume. Wired earphones, unlike BT earphones, do not affect the lag at all.
When the phone is not in lag mode, the sound-feedback is instantaneous no matter how heavily the phone is being used, no matter how many apps I have open. When the phone is in lag mode, it lags even with all apps closed (but the vibration-feedback lag can be temporarily stopped by turning off the sound-feedback). So the lag is not caused by the phone being overloaded (and certainly not by bloatware, which imposes a negligible load). Rather, it's clearly a software bug, such as a memory leak in the sound-feedback drivers.
PLEASE use this thread only to discuss THIS SPECIFIC lag problem.
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