yashsingh1/xdaforums huggingface dataset:
[Xiaomi Mi A2 / 6X Questions & Answers] carloandreaguilar:
Nope. Everyone with goodix sensors on the mi a2 has this problem. Nobody has said they don't. Xiaomi themselves have reported that they reproduced this issue. It is widespread. It happens on all goodix A2s. And it is totally correctable via software. I've rooted and went into kernel settings and seen that the minimum CPU frequency setting is being changed. Manually setting it back to normal fixed the issue. It's not a hardware thing but a driver thing that can be fixed via software no doubt
[Xiaomi Mi A2 / 6X Questions & Answers] cyrillem28410:
Here, 4/64GB, FPC sensor

2 sim card

Naptime installed

Battery level : 28%

Last charge : 1D 13H 19M

Remaining : 13H 3M

Time screen on : 2H 2M

I always charge my phone every 2 days
[Xiaomi Mi A2 / 6X Questions & Answers] e34v8:
No. It's 100% software issue. It has been discussed in this thread. With root, the solution is simple, but that should not be the only way. Very very bad support from Xiaomi. No fix fo two months now. No pie update.

This company seems like a joke. I wonder why their fans like them at all?
[Xiaomi Mi A2 / 6X Questions & Answers] bartoloandre98:
Because their hardware is cheap. Usually they are better but their support towards their Android one devices is a joke.
[Xiaomi Mi A2 / 6X Questions & Answers] ilgreco112:
Does the problem occur also if I never use / never set up the Fingerprint scanner? I really want to buy this phon but I fear it has the problem and usually the customer support is bad on the resellers... I don't care about the fpscanner anyway I won't use it
[Xiaomi Mi A2 / 6X Questions & Answers] bartoloandre98:
no it doesnt
[Xiaomi Mi A2 / 6X Questions & Answers] carloandreaguilar:
October patch released for mi a2 users enrolled in beta program. Should be out in a couple days for everybody else. The description of the OTA says it fixes critical bugs. Hope that means they fixed the FP bug. Somebody already uploaded the OTA on XDA. Anybody tried it and seen if the bug is fixed?
[Xiaomi Mi A2 / 6X Questions & Answers] MoldySoapBox:
I hope they also fixed the slow emmc write/read speed of Mi A2 :( I couldn't install large apps like PUBG
[Xiaomi Mi A2 / 6X Questions & Answers] carloandreaguilar:
I can install pubg just fine...wierd
[Xiaomi Mi A2 / 6X Questions & Answers] kvnfjv:
About my mi a2

i have the 4/64 model and FPC sensor..is my device with the bug? this is the minimum clocks i can see with all tasks clear. (sorry my bad english)
[Xiaomi Mi A2 / 6X Questions & Answers] Anish3757:
No your phone doesn't have the issue .
[Xiaomi Mi A2 / 6X Questions & Answers] MoldySoapBox:
Not just installing pubg. Clearing large app cache, deleting/moving/copying large files from file manager makes my mi a2 lag :(
[Xiaomi Mi A2 / 6X Questions & Answers] otousama:
This issue is a little OT, anyway did you try to bench the read/write speeds? These are mine.

[IMG="AndroBench Read/Write"]https://image.ibb.co/k4bPJe/be.png[/IMG]
[Xiaomi Mi A2 / 6X Questions & Answers] julianobt:
My mi a2 is also with the goodix sensor, but I am not wanting to turn off the sensor, as I use it for other apps and not just to unlock the device. I did a test here with my device, just rebooted and when it was turned on I did the normal unlock by the PIN, and I opened the AIDA64, the cores were oscillating normally, without locking the clock at most. I did some tests using FP and the cores continued to oscillate normally. Here for me, just the fact of restarting the device has already resolved, but I will keep an eye out to see if the clock is locked again.
[Xiaomi Mi A2 / 6X Questions & Answers] mma_1494:
A shot in the dark

I have been following this thread from the last couple of days after ordering a 4/64 Blue mi A2 from amazon(discounted price). I was scared that I might end up with the goodix fp sensor but luckily today I found out that it was fpc. I am just guessing: is it possible that certain coloured variants have goodix while others fpc(My inference is based on some of the replies here on this thread, especially those with blue coloured variants) . Can someone confirm?

P.S: I have the June security patch on the device and I wont be updating till a fix for this problem is issued.
[Xiaomi Mi A2 / 6X Questions & Answers] otousama:
Restarting is temporary, doesn't solve anything on the long term. With my devices the issue appeared few minutes/hours (it is not consistent) after rebooting.

---------- Post added at 01:03 PM ---------- Previous post was at 01:01 PM ----------

Don't know about that, at home we have black and gold variants (4/64), Goodix sensor for both.
[Xiaomi Mi A2 / 6X Questions & Answers] julianobt:
I understood, vour keep an eye to see what happens, for now it's all right, it's been 7 hours since I rebooted and I saw that the cores were working correctly, let's see how far ...
[Xiaomi Mi A2 / 6X Questions & Answers] carloandreaguilar:
Any update on that?
[Xiaomi Mi A2 / 6X Questions & Answers] julianobt:
after you reset the device normal, but after some time the clock is already at the maximum, it was exactly as the friend here said, sometimes it takes a little longer, but it always ends up coming back
[Xiaomi Mi A2 / 6X Questions & Answers] Mixz1890:
Naah, I have the black 4/64 variant and luckily I have FPC but others with the same variant have goodix
[Xiaomi Mi A2 / 6X Questions & Answers] Oreodomino:
Is it a case of manufacturing month or a case of "whichever is at hand at the moment"?
[Xiaomi Mi A2 / 6X Questions & Answers] behzad.bz:
Go to setting and change test file size to at least 512 MB. Then see the result ;)
[Xiaomi Mi A2 / 6X Questions & Answers] otousama:
Yep, got the write speed down to 60 MB/s. That explains why he is getting the issue with large files, even Android bench stopped multiple times during the write test.

Sneaky bug, didn't notice it with daily "normal" use.
[Xiaomi Mi A2 / 6X Questions & Answers] aexlez:
Chrome is not the problem, as I said in other post, the devices with goodix drain battery because the processor is always on 100%.

Turn off the FP and look...
[Xiaomi Mi A2 / 6X Questions & Answers] Lunatiic:
Turning off the fingerprint scanner helps but doesn't completely avoid the problem. Even with It disabled, from time to time my cpu locks on maximum frequency for no aparent reason. I have to keep an eye on AIDA64 and reboot it from time to time. It looks like that It tends to happen when using CPU intensive apps like Waze, but I'm not sure. Also happened after using the camera more intensively.

The reason why it's Qualcomm's fault explains It, I'm guessing it's not the fingerprint driver, it's probably something else (kernel, governor ,...), but the FP somehow manages to trigger the bug more often. The reason why the bug is a bit different on devices with the Goodix sensor compared to FPC sensors is unkown though.
[Xiaomi Mi A2 / 6X Questions & Answers] rcstar6696:
After useing my mi6x on custom Roms like mokee or my own carbonrom it never happens again. CPU never stuck since then. so now we can fully say its a miui only issue.
[Xiaomi Mi A2 / 6X Questions & Answers] jblanco93:
2 months with goodix phone: disabling FP completely stopped the CPU from rising freqs.

1 month with FPC phone: bug never happened

Even if you are right, and there are some cases in which the bug can be reproduced after disabling the FP, that doesn't mean that is not FP fault, it could mean that other stuff can also cause it in a really minor way. Other forums, almost everyone solve it just disabling, and THIS bug has never appeared on a FPC phone. No root, no kernel changes, just deleting FP and rebooting.

Enviado desde mi Mi A2 mediante Tapatalk
[Xiaomi Mi A2 / 6X Questions & Answers] Lunatiic:
It actually happens on FPC phones as well, don't know If It affects ALL of them though. My FPC Mi A2 locks only the slower CPU cluster to 1400Mhz, where It should idle at 630Mhz, the faster cluster oscilates normally, so I don't know. Both devices keep locking even without using the FP, but sometimes It can take a whole week or just a couple of minutes.
[Xiaomi Mi A2 / 6X Questions & Answers] MoldySoapBox:
Here is mine. So much worse than yours :(
[Xiaomi Mi A2 / 6X Questions & Answers] otousama:
With 512 MB I've got a lower score, it seems that write speed is variable with file size, I've reported the bug with Xiaomi feedback system (do they even read our reports?).

On a side note, I see form your screenshot that you got low on battery (15%), try not to bring it in the red zone unless necessary, lithium polymer chemistry is a little sensitive to being near 100% depth of discharge and you will increase the number of discharge cycles by staying on the safe zone (How to Prolong Lithium-based Batteries)
[Xiaomi Mi A2 / 6X Questions & Answers] MoldySoapBox:
Either having my battery in red zone or not does not make any difference at all. I just screenshot-ed the most recent test I have done.
[Xiaomi Mi A2 / 6X Questions & Answers] otousama:
Of course, I didn't mean to imply that having a 15% is going to change something on the test.

It was only a friendly advice since many seems to ignore the fact that even in 2018 a lithium battery require some care to last past his first year in a decent condition.
[Xiaomi Mi A2 / 6X Questions & Answers] Benjamin_L:
Write speed will be fixed by the October update it seems
[Xiaomi Mi A2 / 6X Questions & Answers] bartoloandre98:
im sorry, im afraid this is not the case =( unless you have a source
[Xiaomi Mi A2 / 6X Questions & Answers] Benjamin_L:
Did you read any of the *.14 threads lately??
[Xiaomi Mi A2 / 6X Questions & Answers] bartoloandre98:
I kinda have first hand experience the the first thing I tried was fingerprint, didn't even have time to blink,the CPU got frozen
[Xiaomi Mi A2 / 6X Questions & Answers] Benjamin_L:
People are reporting no more freezes on cache deletion and writing big files
[Xiaomi Mi A2 / 6X Questions & Answers] bartoloandre98:
I yes forgot to say, my writing speeds didnt change
[Xiaomi Mi A2 / 6X Questions & Answers] MoldySoapBox:
October patch is now out
[Xiaomi Mi A2 / 6X Questions & Answers] ARNOB XENON:
Those things are completely fixed in October update..you can test the beta rom.
[Xiaomi Mi A2 / 6X Questions & Answers] Lunatiic:
The october update is already out, no need to flash the beta.
[Xiaomi Mi A2 / 6X Questions & Answers] Grodly:
Yes, October update is out but it did not solve the FP bug with stuck cores.

Have to wait for a proper fix.
[Xiaomi Mi A2 / 6X Questions & Answers] otousama:
I've got even worse write performance with the October patch... Am I missing something? Is there some procedure to follow before/after the patch or it's good to go after the reboot?
[Xiaomi Mi A2 / 6X Questions & Answers] strapabiro:
Installed october patch;

Fingerprint reader still maxes out the cpu.

Phone becomes unusable after pressing clear cache on Chrome.

SmartLock still broken and needs disable before restart.

Dear Xiaomi, I hope you read this, please abandon the android one project here and now, you're a disgrace for the aosp.
[Xiaomi Mi A2 / 6X Questions & Answers] Lunatiic:
My device doesn't become unresposive after clearing chrome's cache (~1GB), it deletes it instantaneously and the device keeps on flying.

Smartlock works fine for me, never had an issue with it.
[Xiaomi Mi A2 / 6X Questions & Answers] strapabiro:
I left a 750 MB cache in chrome just for this and I had to restart the phone to "bring it back" from the slowdown, this is a complete bs.
[Xiaomi Mi A2 / 6X Questions & Answers] otousama:
I tried cleaning chrome cache and everything's got stuck, couldn't even unlock the phone, had to force a reboot.

The rest of the bugs (FP, smart Lock, double icons after reboot etc) are all still there. Dunno what they fixed with this patch.
[Xiaomi Mi A2 / 6X Questions & Answers] Benjamin_L:
Are you by chance using either the 128 or 32gb version? Is your emmc manufacturer Samsung? Then you won't have issues with write speeds
[Xiaomi Mi A2 / 6X Questions & Answers] bartoloandre98:
anyone who is saying it's fixed are bullshitting in my opinion

Led is still complete ****

Cpu freeze bug is still there

read/write speed is still slow

nothing changed from day one.

I never had a device so neglected from the company and so full of bugs ever and i have been with android since htc desire days.
[Xiaomi Mi A2 / 6X Questions & Answers] carloandreaguilar:
Im getting an installation error on this october OTA.... Anybody have any clue why? my bootloader is unlocked, the only thing i ever did was flash a patched magisk boot.img, but then flashed the stock boot.img to make it stock again. the only thing i did with magisk was use kernel auditor. Never used any module. Anybody know what it might be? is there something else i need to do to go back to 100% stock?
[Xiaomi Mi A2 / 6X Questions & Answers] pgkane:
I love reading the posts at XDA..."All I did was completely mess with the entire operating system and kernel of my device and now I'm getting OTA errors....I hardly did anything to it!"

Hilarious. I hope you get it figured out. Seriously.
[Xiaomi Mi A2 / 6X Questions & Answers] julianobt:
I just received a security update of October, with a 100mb + -, I am monitoring the nuclei with aida64, for now it is working normal .. let's see if they solved ...

10 minutes after... clock on max again.. =(
[Xiaomi Mi A2 / 6X Questions & Answers] Lunatiic:
I have the 4/64 variant. How do I check the manufacturer? I coudn't find it on AIDA64, CPU-Z nor HW Info. Honestly, I didn't even know there were more than one storage manufacturer for this device. I never had any slowdowns on my unit so I never really paid attention to the reports complaining about slow speeds.
[Xiaomi Mi A2 / 6X Questions & Answers] MoldySoapBox:
Nothing changed, still the same
[Xiaomi Mi A2 / 6X Questions & Answers] Ravenlll:
There is no change for me. Tried to delete Chrome cache the system stuck that even unlock button not works.
[Xiaomi Mi A2 / 6X Questions & Answers] Benjamin_L:
I had too much hope it seems :(
[Xiaomi Mi A2 / 6X Questions & Answers] theguy:
I have noticed this too. I cannot say for certain that the fingerprint sensor is responsible for it but the small cluster would lock to 1400mhz.

I have been on the October update for about 15 hours and it hasn't reoccurred yet so I'll see if it has solved it or not.
[Xiaomi Mi A2 / 6X Questions & Answers] Mixz1890:
Even when the phone shows 0%, the battery is still above the minimum charge(3,2v if I remember correctly) and it wont damage the battery....At least it should be. Theres no damage to be had using the phone every day from 100-0% apart from usual wear. Of course if you leave it for months with empty battery, then you get into deep discharge state which is bad.
[Xiaomi Mi A2 / 6X Questions & Answers] otousama:
I'm afraid that's not true, unless Xiaomi used some weird over conservative battery management system (but I doubt). What you define "minimum charge" is safe for the battery, meaning it won't catch fire, but would shorten it's lifespan. Same applies for quickcharging techniques that put the battery under stress by having high charge currents and an unhealthy temperature rise. Again, quickcharging won't set your phone on fire (at least it shouldn't) but longevity could take a hit if temperature is not monitored. Of course I'm talking in statistical terms, mean number of charge cycles before a sensible decrease in capacity on a population of batteries. The link I posted earlier shows this phenomenon, even a full charge is detrimental for a lithium based battery for example, but no sane manufacturer would cripple his cellphone by, let's say, limiting the charge to a safer 80%, in avionics on the other hand, reliability is a priority and the ranges of charge and discharge are reduced.

To be honest, battery life is not really a concern if you don't abuse it, only time I've seen batteries suffer is when a phone is used for high demand games (heat) + fast charging (more heat).
[Xiaomi Mi A2 / 6X Questions & Answers] Mixz1890:
I still would argue that discharging the battery to 3.2v does not damage it but eh.... True about the fastcharging though. And the batteries cost like 10euros anyway so in reality I dont care about them at all.
[Xiaomi Mi A2 / 6X Questions & Answers] e34v8:
Never had such issues. Maybe it is like the FP bug - only some devices are affected.
[Xiaomi Mi A2 / 6X Questions & Answers] otousama:
They are cheap, true, but with modern phones like the A2 you have to pry it open, we are in the "non-serviceable" age now. If you are interested, this paper contains a lot of interesting informations about Li-Ion battery aging and it's factors: B. Xu, A. Oudalov, A. Ulbig, G. Andersson, S. D. Kirschen, "Modeling of Lithium-Ion Battery Degradation for Cell Life Assessment." IEEE Transactions on Smart Grid, (9)2, 2016.
[Xiaomi Mi A2 / 6X Questions & Answers] pack21:
Clock is counting, if is not a hardware issue, where is the software fix? By A3 launching?
[Xiaomi Mi A2 / 6X Questions & Answers] e34v8:
Please stop with this "hardware issue" stuff! Please! If it was a hardware issue, it would not be possible to fix it by changing the software (which a lot of users did, including me).

The only real issue is, and it's a BIG one, the total lack of support from Xiaomi. This is and Android one phone. Pie update should be out by now. Also bugs fixed. But no. Xiaomi is a joke. I was considering buying the Mi8 this month, but I will never buy a Xiaomi phone again.
[Xiaomi Mi A2 / 6X Questions & Answers] lordkelvinx:
Just released another October update, this time with just over 200mb.
[Xiaomi Mi A2 / 6X Questions & Answers] Catsonvi:
It appears that the new 200MB update fixed the fingerprint sensor and CPU lock bug, Smart Lock blank screen bug and the read and write speed issues.
[Xiaomi Mi A2 / 6X Questions & Answers] bartoloandre98:
You have goodix sensor?
[Xiaomi Mi A2 / 6X Questions & Answers] Grodly:
I really think so to. Now I have One hour since apply update and cores still Idle at 633MHz after adding fingerprint.
[Xiaomi Mi A2 / 6X Questions & Answers] Catsonvi:
Yes. So far everything seems perfectly fine.
[Xiaomi Mi A2 / 6X Questions & Answers] bartoloandre98:
That would be great, unfortunately I was on beta and they didn't push this update to me :/
[Xiaomi Mi A2 / 6X Questions & Answers] Ravenlll:
It looks like max CPU frequency bug is fixed, but bug with 1401MHz on first (Big) cluster remains on both Goodix and FPC sensors, and it seems that 1401MHz bug is even not related to fingerprint sensor at all
[Xiaomi Mi A2 / 6X Questions & Answers] Catsonvi:
That bug is not present for me, the cores remain on 633MHz.
[Xiaomi Mi A2 / 6X Questions & Answers] jblanco93:
Ups, it seems that they listened to you

Enviado desde mi Mi A2 mediante Tapatalk
[Xiaomi Mi A2 / 6X Questions & Answers] pack21:
I really hope, but i don't think so.
[Xiaomi Mi A2 / 6X Questions & Answers] otousama:
Rom writing speed still the same as before and chrome cache cleaning freezes the system. This has not been fixed.
[Xiaomi Mi A2 / 6X Questions & Answers] kvnfjv:
i have this problem in all apps with big cache..not only chrome..:(
[Xiaomi Mi A2 / 6X Questions & Answers] carloandreaguilar:
THANK THE LORD

I knew Qualcomm would solve it quickly
[Xiaomi Mi A2 / 6X Questions & Answers] bartoloandre98:
I can confirm new update fixed the finger print sensor. THANK you qualcomm
[Xiaomi Mi A2 / 6X Questions & Answers] pack21:
Max Freq is not fixed, because is a hardware issue.

They should make a worldwide call.
[Xiaomi Mi A2 / 6X Questions & Answers] alfat696:
no its not..... frequency is all ok in custom roms
[Xiaomi Mi A2 / 6X Questions & Answers] alfat696:
i know it didnt...i have mia2 and 5ai both have same problem
[Xiaomi Mi A2 / 6X Questions & Answers] Catsonvi:
It has been like a day since I installed the update and everything is working fine. Not sure what you are talking about.
[Xiaomi Mi A2 / 6X Questions & Answers] cris1990:
I don't think this is a hardware issue. I have rn5 and when I restart it gets really fine for a day or less.

Enviado de meu Redmi Note 5 usando o Tapatalk
[Xiaomi Mi A2 / 6X Questions & Answers] jblanco93:
Are you bored and trying to draw attention? CPU is working perfectly with FP in last update

Enviado desde mi Mi A2 mediante Tapatalk
[Xiaomi Mi A2 / 6X Questions & Answers] e34v8:
Yes he is. He's a troll also. Ten people told him it's a software issue and the fix is simple, but he ignores all. Classic troll behavior. Now people are reporting that the issue is fixed in the last update, but again... trolling.

I personally am still on the previous security update, cause I rooted and just simply changed the frequencies manually. The only reason I'm not updating is because for now my phone is working perfectly and don't have the time to update and reset and all of that. I'll do that when Pie update comes out.
[Xiaomi Mi A2 / 6X Questions & Answers] tomgv:
Good battery life after second update. (4g + wifi) I use fingerprint for wake up and unlock. View attachment 4623387View attachment 1View attachment 4623390
[Xiaomi Mi A2 / 6X Questions & Answers] pack21:
Fair, i will come here Monday to see that permanent fix. ?
[Xiaomi Mi A2 / 6X Questions & Answers] Lurensu:
So do you still have the issue on the latest october update (9.6.15)?
[Xiaomi Mi A2 / 6X Questions & Answers] theelle:
So bug is fixed or not?
[Xiaomi Mi A2 / 6X Questions & Answers] farizafiq:
Great! the October update fixed the issue. KUDOS and Thank You!
[Xiaomi Mi A2 / 6X Questions & Answers] Lurensu:
If noone is experiencing the issue on the latest update, why are you keep saying that it's not solved?

Obviously we should wait for few days to be 100% sure, but it looks like they've fixed it.
[Xiaomi Mi A2 / 6X Questions & Answers] MarianoGarcia84:
The FP bug is not solved with October update.

---------- Post added at 06:01 AM ---------- Previous post was at 05:57 AM ----------

I've FPC and the bug is not solved in October Update.
[Xiaomi Mi A2 / 6X Questions & Answers] theelle:
I still don't understand if bug is still there even after second update...
[Xiaomi Mi A2 / 6X Questions & Answers] Lurensu:
If you have an FPC reader, then I think it's a different bug

---------- Post added at 07:53 AM ---------- Previous post was at 07:52 AM ----------

It looks like it is. I'll wait sone more hours in order to be sure
[Xiaomi Mi A2 / 6X Questions & Answers] Ravenlll:
The bug with max frequency is solved. But the bug with 1401 MHz remain on both sensors, and I think it's not related to fingerprint scanner. Some people say that disabling smart lock helps. But I never meet this bug on my phone.
[Xiaomi Mi A2 / 6X Questions & Answers] Lunatiic:
Interesting. I have the Goodix sensor and I've been using the FP since the second october update arrived and all my cores are still idiling just fine (633/1113). I never had the 1401 bug though, even though I use smartlock, I only had the "all cores maxed" one. Tought both bugs were fundamentally the same.
[Xiaomi Mi A2 / 6X Questions & Answers] bartoloandre98:
Now I think we need to push for memory reading and writing speed fix , if it's software related that is because it is abysmal
[Xiaomi Mi A2 / 6X Questions & Answers] Ravenlll:
I am also never has the bug with 1401MHz, but people says that the 2nd October update the max frequency bug is solved, but the bug 1401MHz is still persists. And the frequencies is not stuck, they can go up and down but only until 1401MHz, and not moving below to 633mhz as it intended to be.
[Xiaomi Mi A2 / 6X Questions & Answers] AcostaJA:
No bug here, I use fp for for everything, A2 4/64 Black (wos fp/fpc?)
[Xiaomi Mi A2 / 6X Questions & Answers] tomgv:
Fingerprint bug with goodix sensor is fixed.

View attachment 4623894

View attachment 4623895
[Xiaomi Mi A2 / 6X Questions & Answers] JassyNL:
Just checked this with CPU-Z and my frequencies are just doing perfect. It is not stuck at maximum but scaling down to lower frequencies perfectly.
[Xiaomi Mi A2 / 6X Questions & Answers] philipp_023:
I cleared the cache of a few apps (i.a. maps, chrome) and restarted my phone. Now my frequency is no longer stuck at max and it is going up and down normally. Will monitor it the next days ..