yashsingh1/xdaforums huggingface dataset:
[Xiaomi Poco F1 Questions & Answers] jody2k:
Yea exactly feeling like i'm going back in time 10 years ago with this phone when it comes to touch. I'm travelling 2 months now and I need to use this phone alot to write to people. I'm really sick of using the backspace button bcause i can't even write 2 words correctly without any error. And then the random freezing terrible really

Not very sure anymore this is a software issue bcause they are failing hard to fix it. And i don't believe it will be ever fixed too so.

Maybe we should start a big petition and ask for refund bcause this is rediculous
[Xiaomi Poco F1 Questions & Answers] ron_hyatt:
read this:

https://fossbytes.com/xiaomi-takes-back-poco-f1-devices-after-users-report-touch-issues/

i doubt this will happen:(
[Xiaomi Poco F1 Questions & Answers] alifarhad:
There's a new stable build of MIUI 10.3.6 and many users on the MIUI forum are reporting that it had fixed their touch issues. Unfortunately, it did nothing to fix mine but I was able to fix them by flashing custom Kernels.

Also most of those users who say their touch is fixed by the latest update have FTS touch panel. So it's probably worth a try if you have fts panel. Mine is NVT and like I said earlier it did nothing to fix mine :fingers-crossed:
[Xiaomi Poco F1 Questions & Answers] jody2k:
Yea they only fixed the FTS ones but NVT like mine is still suffering from Innacurate touch on keyboard and random freezing. Surely drunk kernel helps to improve it but just try to write a text on a other phone and then go back to your Poco you'll notice it's still ****
[Xiaomi Poco F1 Questions & Answers] alifarhad:
Yes same issue on the stock kernel. I have flashed Franco kernel for now. Flashing custom Kernels on my device takes care of the touch issues so I'm not really bothered about it anymore plus
[Xiaomi Poco F1 Questions & Answers] ismael1987:
Hi all.

First of all, sorry for my bad english.

I have a pocophone f1 with ridiculous ghost touches and screen freezes.

Hwinfo shows my panel version is nvt-ts, but i found a weird thing in the kernel log dmesg.

Here is the weird part of the log:

8] [NVT-ts] nvt_read_pid 389: PID=5907

[ 0.901944] input: NVTCapacitiveTouchScreen as /devices/virtual/input/input2

[ 0.902188] [NVT-ts] nvt_ts_probe 1759: int_trigger_type=1

[ 0.902418] [NVT-ts] nvt_ts_probe 1771: request irq 287 succeed

[ 0.902425] [NVT-ts] nvt_get_lockdown_info 872: ++

[ 0.902432] [NVT-ts] nvt_get_oem_data 678: ++

[ 0.947022] [NVT-ts] Init_BootLoader 343: Init OK

[ 0.990067] [NVT-ts] Resume_PD 186: Resume PD OK

[ 1.093784] [NVT-ts] nvt_get_oem_data 787: --

[ 1.093793] [NVT-ts] nvt_get_lockdown_info 897: --

[ 1.093805] [NVT-ts] nvt_ts_probe 1781: Lockdown:0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff

[ 1.093814] [NVT-ts] nvt_get_config 856: can't find right config

[ 1.094054] [NVT-ts] nvt_flash_proc_init 601: Succeeded!

[ 1.094063] [NVT-ts] nvt_flash_proc_init 604: ============================================================

[ 1.094071] [NVT-ts] nvt_flash_proc_init 605: Create /proc/NVTflash

[ 1.094077] [NVT-ts] nvt_flash_proc_init 606: ============================================================

[ 1.094097] [NVT-ts] nvt_extra_proc_init 917: create proc/nvt_fw_version Succeeded!

[ 1.094113] [NVT-ts] nvt_extra_proc_init 925: create proc/nvt_baseline Succeeded!

[ 1.094124] [NVT-ts] nvt_extra_proc_init 933: create proc/nvt_raw Succeeded!

[ 1.094135] [NVT-ts] nvt_extra_proc_init 941: create proc/nvt_diff Succeeded!

[ 1.094146] [NVT-ts] nvt_extra_proc_init 949: create proc/nvt_xiaomi_config_info Succeeded!

[ 1.094155] [NVT-ts] nvt_extra_proc_init 957: create proc/tp_lockdown_info Succeeded!

[ 1.094197] [NVT-ts] nvt_mp_proc_init 1908: create /proc/nvt_selftest Succeeded!

[ 1.094270] [NVT-ts] nvt_ts_probe 1878: end

It shows nvt_get_config 856: can't find right config.

in this telegraph post, shows the version of the driver loaded for the kernel: https://telegra.ph/Pocophone-F1--Poco-F1--issues-05-29

Is this normal?
[Xiaomi Poco F1 Questions & Answers] haaffizzzz:
The ghost touches are hardware related, not software, so the only solution is to change your lcd, either by going to the local shop or changing it yourself. Trust me. I used to have ghost touches on upper left side of the screen, it was so bad to the point that it was unusable, thus I decided to go to the local shop to change the lcd. Costed me $45. No more issues so far ;)
[Xiaomi Poco F1 Questions & Answers] TimHermans:
Could somebody with ghost touch issues please test and confirm this? I didn't use any gestures before, only the double tap power to start camera, after I disabled this only active gesture, I didn't have a single ghost touch for 2days now..

I really suspect the gesture options as the origin of the ghost touch issues..

Edit: Scrap this.. Oh the irony, as soon as I posted this and tested again I saw short ghost touch.. Aaargh!
[Xiaomi Poco F1 Questions & Answers] nahinrahman:
pocophone should get stock like os, realme started realme os to prevent these bugs, with stock ui instead of memeui we can have all sorts of problems gone..... need support from poco team.
[Xiaomi Poco F1 Questions & Answers] Ichigekihissatsu:
I beg to differ, I'm a Pixel Experience rom user and I used to have LCD touch issues before the recent PE update.

But it was all fixed after the 20190709 PE update was released.
[Xiaomi Poco F1 Questions & Answers] ron_hyatt:
which pe rom? please provide thread link.
[Xiaomi Poco F1 Questions & Answers] aamoos:
which vendor firmware and kernel can solve ghost touch and screen freezing issue of pocophone with fts_ts panel. I am frustrated now by this issue I tried various custom roms and kernel but cannot solve this issue. Please help me...anyone...
[Xiaomi Poco F1 Questions & Answers] Xaeron00:
Disable the notch
[Xiaomi Poco F1 Questions & Answers] baiMangau:
Hey there. I've been trying different combos for a long time for my fts screen, but none of them resolved the issue. However, my current combo has no freezes and has very very few ghost touches. Like, 1 ghost touch per day. It's not a complete solution, but it's the best I've seen so far. And I've seen and tried many.

Here's my setup:

crDroid 5.7, 20190811 update, using the vendor soft that comes with it, firmware 10.3.6.0, latest Franco kernel 29, and build.prop settings quoted below (suggested in a previous post here), notch enabled.

---

touch.presure.scale=0.001

persist.service.lgospd.enable=0

persist.service.pcsync.enable=0

ro.ril.enable.a52=1

ro.ril.enable.a53=0

persist.sys.ui.hw=1

view.scroll_friction=10

debug.composition.type=gpu

debug.performance.tuning=1

#advanced touch settings

touch.deviceType=touchScreen touch.orientationAware=1 touch.size.calibration=diameter touch.size.scale=1

touch.size.bias=0

touch.size.isSummed=0

touch.pressure.calibration=physical touch.pressure.scale=0.001 touch.orientation.calibration=none touch.distance.calibration=none

touch.distance.scale=0

touch.coverage.calibration=box

touch.gestureMode=spots

MultitouchSettleInterval=1ms

MultitouchMinDistance=1px

TapInterval=1ms

TapSlop=1px
[Xiaomi Poco F1 Questions & Answers] jody2k:
I confirm that replacing screen with new one from aliexpress improves touch alot. Everything seems to work normal now. No ghost touch no weird freezes no lag and more accurate when typing

Is it perfect? No but a big improvement for sure
[Xiaomi Poco F1 Questions & Answers] diegoms51:
How long have you tested these settings? Because freezes and ghosts usually intensify after 1 or 2 days

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[Xiaomi Poco F1 Questions & Answers] ipdev:
Hi all.

Quick question to those who have replacement screens.

How long have you had your replacement screen?

Anyone develop touch issues with a replacement screen?

Curious because most users noted touch issues showed up after a few months of using their phones.

I'd have too look back but, I believe it averaged about two and a half months.

For me it was a little over three months but, I did not use mine that much in the first 2 months.

Cheers.
[Xiaomi Poco F1 Questions & Answers] ron_hyatt:
issues started after 7 months in my case. didnt replace and will never replace screen coz my issue improves with certain vendors/kernels combos so its definately software related and its also related to the phone heating up during this damned game pubg coz no issues at all when temperatures are relatively low.
[Xiaomi Poco F1 Questions & Answers] baiMangau:
Oh, I know. About a week now.

Yesterday, for example, I got the ghost touches. I got them for 30 secs and that was it.
[Xiaomi Poco F1 Questions & Answers] diegoms51:
A month ago I blocked the bootloader and totally returned to stable stock. I would like to know if the custom kernels and custom roms are already ghost and freezes free because here, in stock, I don't have any of those problems I had in customs.

Enviado de meu POCOPHONE F1 usando o Tapatalk
[Xiaomi Poco F1 Questions & Answers] jody2k:
For those who changed the screen from aliexpress I must say this one also works best with stock kernel 10.3.6.

Not that i had ghost or freezes with custom kernels with this new screen but it just feels most responsive and smooth with the stock kernel.

Changing the screen def solved my touch issues day 3 now: freezing and ghosts are completely abscent
[Xiaomi Poco F1 Questions & Answers] henriluiz:
i'm on the second fts touch screen (replaced) 3 months ago; 1 month after replace the screen the ghost touches come back.

now i'll replace it by a nvt panel on the original frame.

did you buy it with a fts or nvt touch? my replacement is fts, i had one good month without ghost touches, after that the ghost come back.
[Xiaomi Poco F1 Questions & Answers] jody2k:
I just checked its a fts_ts touchscreen, I hope it won't come back after 1 month but surely ill keep this thread up to date if it does. Fingers crossed

---------- Post added at 08:58 AM ---------- Previous post was at 08:55 AM ----------

Honestly I had already touchissues the day i bought the phone from the store 8 months ago so in my case touch issues did not appear after 1 month / 2 months but immediatly
[Xiaomi Poco F1 Questions & Answers] deprat:
Anyone can recommend me a good kernel for fts? I'm kinda insane to fix this fvckng ghost touch
[Xiaomi Poco F1 Questions & Answers] troyinjapan:
Illusion (Derp) or Optimus Drunk.

The ROM I'm using for both an FTS and another NVT panel is Evolution-X.
[Xiaomi Poco F1 Questions & Answers] ImQseft:
Apparently, 10.3.8 fixes the ghost touch for most fts users. Does this apply to custom ROMs as well?
[Xiaomi Poco F1 Questions & Answers] billabongstaff:
Fixed.

Yep.

10.3.8.0 firmware + the recompiled ak3 version of 10.3.8.0 Kernel fixed ghost touches for me 100%.

Using RR 7.0.2 (25-07-2019)

No other tweak used (such as build.prop or hiding notch or whatever).

2 days now without a single lag, ghost touch or whatever. Typing is fully accurate.

I can now finally rest my head about this.

Thank you all.
[Xiaomi Poco F1 Questions & Answers] CHriS poco:
I didnt get new update ,not showing update in system update
[Xiaomi Poco F1 Questions & Answers] ImQseft:
Just wait for it. It comes by batches.
[Xiaomi Poco F1 Questions & Answers] :
My screen freezes for 5-8 secs when playing pubg. It's once in 20-30 mins. Sometimes not. It happens with me on firmware 10.3.7 and 10.3.8. But 10.3.6 worked fine. I have NVT panel on my Poco.

Is there any solution or should I use 10.3.6 ?
[Xiaomi Poco F1 Questions & Answers] shaqman89:
So, I've just got this phone, and it came with MIUI Global 10.3.8 and nvt screen. I haven't seen any issues (yet) so far, since its been less than a week, but I plan to get a custom AOSP based ROM. Should I be worried and just stick with stock for now? Or are the issues are finally completely gone with the latest releases?
[Xiaomi Poco F1 Questions & Answers] voetbalremco:
All custom kernel are still based on 10.3.7 I believe, right?

Might be good if they switched as well to fix touch issues
[Xiaomi Poco F1 Questions & Answers] gigishan:
I am facing touch issues and screen freezes on my poco f1 running pixel experience android pie plus version....do u know a fix? (And it will still there if i flash miui 11?) Thanks in Advance
[Xiaomi Poco F1 Questions & Answers] Vinnom:
you can try, but miui 11 fixed my ghost touches and screen freezes

although I don't like miui, I'm not willing to get those back again going back to custom for now
[Xiaomi Poco F1 Questions & Answers] jackiass:
Where did you get the kernel?
[Xiaomi Poco F1 Questions & Answers] baiMangau:
By the way, I've been on latest 5.9 crdroid and flashed firmware 11.0.5.0. 3 days now and I haven't noticed a single ghost touch or screen freeze.

I'm on the built in kernel and vendor that come with the rom.

Edit: scratch that. I got the gt 5 mins after I wrote the post. Again.
[Xiaomi Poco F1 Questions & Answers] Sai362k:
Ghost touches and Screen Freezes depends on type of batch you are having. If you earlier had screen freezes only then latest firmware and kernel based on los commit works fine for some batches . If u had ghost touches using it then the digitiser firmware in kernel i.e the old one from los kernel which all kernels are based is having issue. Thanks to [MENTION=7280276]ipdev[/MENTION] without him I wouldn't have able to use custom roms. Kudos to him for making us available the stock kernel ak3 which can be used over other aosp roms. The thing is simple the kernels devs must include the latest firmware from 10.3.8.0 which holds the universal fixes for all batches of fts. It's pretty sad that those who were doing this inclusion have moved to other device development. With that being said if u are one facing ghost touches on latest firmware and kernel just use ipdev kernel or miui eu / global/globe/room 10.3.8.0+.
[Xiaomi Poco F1 Questions & Answers] voetbalremco:
Hi [MENTION=7280276]ipdev[/MENTION]

Thanks for fixing the screen fixes on custom roms. :)

It would be very appreciated to have an ak3 kernel update from the V11.0.4.0 Android 10 release as well.
[Xiaomi Poco F1 Questions & Answers] ipdev:
Hi.

I wasn't sure if any one else was still using it.

I'm not currently using my Poco F1 as my main device.

Just got time to update my Poco the other day.

Next time will be quicker. :)

Cheers. :cowboy:

Pocophone GoogleDrive - Link

Pocophone MediaFire - Link

Note:

With the shift to Android 10.

New version will still be on my GoogleDrive and MediaFire.

Older (Android 9) versions, some will be moved to Android File Host.

Some will just be removed.

I'll update links once files are move.

(If I really have to do it one at a time, it will take awhile.)
[Xiaomi Poco F1 Questions & Answers] voetbalremco:
Atleast I am. :)

Thanks once again.
[Xiaomi Poco F1 Questions & Answers] MrSchaal:
Hi, I'd like to try your kernel in combination with LOS16 but I'm a little confused which vendor firmware and kernel to use.. Which is the latest compatible version with Android 9 /LOS16? I'm afraid that V11 is for Android 10 only, isn't it?
[Xiaomi Poco F1 Questions & Answers] ipdev:
Hi.

Yeah I still need to do some cleanup/organizing of my online storage(s).

Eventually, the older files will be moved to AndroidFileHost.

For now, there is an Android 9 and 10 directory(folder) in the xfiles directory(folder) for the last few builds.

The newest (Android 10) will be in the main directory(folder).

MIUI's numbering system is a little different but, once you recognize it, it makes sense.

Beta program uses the date. Stable release uses the version number.

Example.

Beta.. (Recovery flashable zip file.)

miui_POCOF1Global_9.6.27_6673f8a455_9.0.zip

miui_DeviceROM_2019-6-27_hash_SDK28.zip

Stable.. (Recovery flashable zip file.)

miui_POCOF1Global_V11.0.6.0.QEJMIXM_e45c83a2db_10.0.zip

miui_DeviceROM_V(MIUI 11.0.6.0).Build_hash_SDK29.zip

Fastboot.. (gzipped tar archive file.)

beryllium_global_images_V9.6.25.0.OEJMIFD_20181008.0000.00_8.1_global_02164be3d6.tgz

DeviceCodeName_ROM_images_V(MIUI 9.6.25).Build_BuildDate_SDK27_ROM_hash.tgz

The stable version number should increase sequentially.

It got messed up a little in the switch from MIUI10 to MIUI11 while the base was being switched from 28 to 29. From Android 9 (P) to Android 10 (Q)

The last stable releases (11.0.5 was released before 11.0.4) :

v10.3.8.0 (Android 9) (SDK28)

v11.0.5.0 (ANdroid 9) (SDK28)

v11.0.4.0 (Android 10) (SDK29)

v11.0.6.0 (Android 10) (SDK29)

Hope it helps.

Cheers. :cowboy:

Edit:

SideNote.

(cm)LineageOS versions follows the English alphabet like Google does with the code name.

Android 8 (O) 15th letter, Lineage 15

Android 9 (P) 16th letter, Lineage 16

Android 10 (Q) 17th letter, Lineage 17

For info on API/SDK/NDK build numbers and names.

Code names and build numbers. source.android - Link
[Xiaomi Poco F1 Questions & Answers] MrSchaal:
Thanks, this folder structure is much easier to understand! :highfive:

So I've dirty-flashed the latest LOS nightly OTA update package (lineage-16.0-20200313-nightly-beryllium-signed.zip) and V11.0.5.0 vendor/firmware today and now my screen brightness control is not usable anymore (screen is just flickering if moving the slider) and livedisplay does not work anymore. Anyone has a clue? :confused: :(
[Xiaomi Poco F1 Questions & Answers] johndoe118:
After I changed the touchscreen and tried different kernels/firmwares, the problems remained. But with crDroid and Android 10 everything works :laugh:
[Xiaomi Poco F1 Questions & Answers] Ichigekiq:
How do you flash stock miui kernel to PE rom? I'm having touch freeze issues and it's really annoying.
[Xiaomi Poco F1 Questions & Answers] Mooatreides:
Dowbload latest miui beta, unzip, copy the boot.ing to your phone then in twrp click install, then go to where u saved the boot(click images on bottom right or u wont see it), then select to install as boot, wioe cache and dalvik theb boot system.
[Xiaomi Poco F1 Questions & Answers] Ichigekiq:
So I flashed the stock MIUI boot.img to PixelExperience_beryllium-9.0-20190317-0241-OFFICIAL last night and I never had a screen freeze and touch lag since. Thank you very much for sharing the fix!
[Xiaomi Poco F1 Questions & Answers] Mooatreides:
Thats great! Hope its fixed on all roms and kernels soon!!
[Xiaomi Poco F1 Questions & Answers] Mooatreides:
Hey guys, with the help of [MENTION=7280276]ipdev[/MENTION] i learned to make a boot for specific rom with miui kernel in it. If anyone wants this is miui 9.3.28kernel in boot.im from latest 3/27 nightly of crdrdoid. Works 100% on crdroid im using it now.

Also theres a method to make the boot.img universal for all poco android 9 phones and im looking to figure it out.

https://drive.google.com/file/d/1XktQ6vr375d5GMIzIpGylK2vuAaRAo3X/view?usp=drivesdk
[Xiaomi Poco F1 Questions & Answers] diegoms51:
Running here at NitrogenOS, thank you very much for sharing.

Enviado de meu Poco F1 usando o Tapatalk
[Xiaomi Poco F1 Questions & Answers] Mooatreides:
Thats great! Probably works because they are both based off of LOS so if someone wants to try another LOS rom it could be good.
[Xiaomi Poco F1 Questions & Answers] diegoms51:
Would you know why customs kernels are still suffering from freeze on some screens? They update frequently, why have not they implemented driver updates yet?

Enviado de meu Poco F1 usando o Tapatalk
[Xiaomi Poco F1 Questions & Answers] Mooatreides:
I have bo idea man but they say they dont know where the fix is
[Xiaomi Poco F1 Questions & Answers] jovinxx:
I’am also having more and more screen freezes. It’s starting to get really annoying. I’am on the latest LOS. Is there a workaround for LOS?
[Xiaomi Poco F1 Questions & Answers] Mooatreides:
Yeah man read the thread
[Xiaomi Poco F1 Questions & Answers] CHGICEMAN:
Can you give me a short tutorial, step by step, how to install it and influence the LineageOS OTA?
[Xiaomi Poco F1 Questions & Answers] autisticarvin:
I think because the touch driver most kernels use is 9.1.24 which in my experience (fts panel), has screen freezing issues. I noticed no screen freezes starting 9.3.7.
[Xiaomi Poco F1 Questions & Answers] pingufanpoy:
Lol

You get what you pay for =-(((
[Xiaomi Poco F1 Questions & Answers] Mooatreides:
Yeah its definitely fixed on miuo 9.3.7 +, i think probolem is some nvt panel users got freezes happening now. So hopefully once they get it fixed for both touch panels they will release the new touch firmware. IDK anything at all its just my theory.
[Xiaomi Poco F1 Questions & Answers] autisticarvin:
That's very unfortunate. They fixed touch for fts users while breaking it for some nvt users. Typical Xiaomi ?

Anw, i tried this method of kernel flashing in PE AOSP and it worked like a charm. Thank u 4 that ?
[Xiaomi Poco F1 Questions & Answers] Mooatreides:
Guys someone pointed this out in new LOS release, does this mean its fixed??? Can someone try on next build???
[Xiaomi Poco F1 Questions & Answers] CHGICEMAN:
I am not sure how to reproduce the problem.
[Xiaomi Poco F1 Questions & Answers] nahinrahman:
use 9.3.28 kernel, all touch issue r fixed there, i tried on oos,rr try on other roms at your risk.
[Xiaomi Poco F1 Questions & Answers] Nil253259:
I might try. Enough with MIUI sh#t. Notifications and ROM management are horrible
[Xiaomi Poco F1 Questions & Answers] gori0n:
Hello,

Sorry for resurrecting this topic but maybe some people still have this ghost touch / screen freeze issue.

I updated yesterday to LOS 17.1 (dirty flash from LOS 16) with firmware V11.0.9.0.QEJMIXM and everything is working perfectly now (no more ghost touch).

I can finally use this phone as it was intended, 1,5 year after its purchase... yay

Cheers
[Xiaomi Poco F1 Questions & Answers] mdki1996:
I have Ghost touches and freezes even in MIUI global official 12.0.2. I suppose that installing this rom via fastboot should bring Aldo latest touch driver. I tried with 2 ebbg units.
[Xiaomi Poco F1 Questions & Answers] Mooatreides:
Ouff i asked the dev of crdroid he said those commits arent the fix and have been on crdroid for a while, LOS official is just adding them now.

If you want just go with Pixel Experience and flash the boot.img from latest miui beta.

Or go with crDroid (sick rom! better then PE) flash the rom, gapps, dfe then magisk annnnd the kernel i posted from my google drive and it will work.
[Xiaomi Poco F1 Questions & Answers] autisticarvin:
Up for this thread. This needs more attention. There is a new PE AOSP build by the way and I'm gonna try that with 9.3.28 miui kernel.
[Xiaomi Poco F1 Questions & Answers] Mooatreides:
Just updated my girls poco with the new PE amd it looks good! You can use the boot.img from9.4.1 even jusy unzip and flash in twrp as boot bro:good:

Thanks for the bump!
[Xiaomi Poco F1 Questions & Answers] diegoms51:
Will devs fix this problem in custom kernels?

Enviado de meu POCOPHONE F1 usando o Tapatalk

---------- Post added at 02:46 PM ---------- Previous post was at 02:26 PM ----------

How do I do this? The last time I extracted the boot.img and installed it on a AOSP gave bootloop.

Enviado de meu POCOPHONE F1 usando o Tapatalk
[Xiaomi Poco F1 Questions & Answers] Mooatreides:
It worked for me i unzipped miui 9.3.27, took the boot.img and flashed it in twrp as boot for PE aosp, im on crdroid though so can't test
[Xiaomi Poco F1 Questions & Answers] diegoms51:
Ok, thanks

Enviado de meu POCOPHONE F1 usando o Tapatalk
[Xiaomi Poco F1 Questions & Answers] Mooatreides:
Wait to be clear, my girlfriends poco works fine it has nvt panel, i did it on my poco with fts with PE and kernel fro miui 9.3.xx i dont remeber which but i posted imhere about it.

You can use the boot i made for crdroid on crdroid with zero freezes and its just like PE just with more customization. Remove aosp apps or even use stock gapps and it repkaces them. I like the aoso music player its the only one i kept.
[Xiaomi Poco F1 Questions & Answers] Nil253259:
Boot image may require the vendor of the same version as well iirc. So 9.3.28 boot requires you to be on 9.3.28 vendor. At least that's what I experienced. Older vendor gave me boot loop