Galaxy Note 4 “Could not do normal boot, mmc_read failed” error, other boot problems
Do you have problems starting your #GalaxyNote4? Our post today may point you to the right direction. Below are some of the booting problems shared by some members of our community:
Problem #1: āDM-verity verification failedā error after rooting Galaxy Note 4
I attempted to root my Galaxy Note 4 on Odin. Showed a message with the red logo that reboot would take place in 10 seconds, and phone showed the normal Galaxy Note 4, and then Samsung and then went back to Galaxy Note 4, and wouldnāt boot up for two days.
I took the battery out a few times, attempted re-rooting a few times, all to no avail. So went into the Recovery Mode but at the bottom of my phone, the message, ādm-verity verification failedā appeared. Attempted cache partition, wipe data and each time the message shows complete for each, except that when I did reboot system now, the same problem of persisted and the dm-verity message is still showing in the recovery screen. ā Adeola
Solution: Hi Adeola. Rooting has inherent risks and can sometimes lead to really nasty software glitches. One of such glitches is the error ādm-verity verification failedā, although it can also specifically result from installing an incorrect firmware. During most times, ādm-verity verification failedā error happens after damaging or changing some files in the EFS folder which keeps unique information about your device. Whatever the true cause is, thereās only one effective solution that we know of for this issue ā re-installation of stock ROM or firmware. Once youāve reinstalled the stock firmware, the phone should boot normally again.
We recommend that you be careful when rooting your device again. Doing so is risky and does not always guarantee that the device will work properly.
Problem #2: Galaxy Note 4 screen wonāt lock up for 10 seconds after booting
This is the 2nd Note 4 Iāve owned, the one Iām now using replaced a new one. When I updated to Lollipop 5.0.1 on the 1st Note 4, I noticed the screen would be unlocked for about 10 seconds upon power up. I thought it was the fault of the update, so I reset the phone and updated it a 2nd time. Same issue. I searched for the problem in different forums and found nothing, so I assumed it was the phone.
Verizon sent me a refurbished phone and its doing the same thing. I havenāt found anyone else having this issue, or at least no one has asked that I can see. So, can you tell me what may be going on?
These are my settings: I have the screen set to lock after 2 min of non use; the screen is supposed to be locked at startup but itās unlocked, exposing my texts, email, contacts, etc. for at least 10 seconds on startup. Then, after about 10 seconds the screen will enter lock mode and the pin keyword will appear. Can you tell how to fix that? I prefer NOT to use a 3rd party screen lock app. Thanks. ā Jeff
Solution: Hi Jeff. Youāre right. No one appears to have reported this particular issue to us or to any other Android forum although we think itās a Verizon firmware bug. If this issue started happening after Verizon pushed an over-the-air update, other users might also be experiencing it though you may be the first to report it publicly. To be frank, we canāt think of any other solution other than letting Verizon technical support team, especially their developer team that maintains Android firmware for their devices. An issue like this runs deeper on how their firmware is coded so the solution is beyond us.
Try to visit Verizon Android communityĀ forumĀ and post a thread there. Verizonās community forum is monitored and if youāre in luck, you may get specific support from the right technical team.
Problem #3: Galaxy Note 4 keeps saying account passwords are incorrect
I can no longer log into any app or any website that requires a password. When I enter my password that I KNOW is correct because I just checked them by logging into all the same sites on my desktop and writing down the password exactly as I entered it, it tells me that the password is incorrect or invalid every time. I cannot change password either because when I enter the password it will always tell me that the password and confirmation passwords donāt match when I KNOW that they do. Even when I can SHOW passwords and confirm they match I get the same error. I also cannot create a new account on any website for that same reason.
I also frequently get error messages about password tips. For instance when Iām entering the new password and follow the password tips exactly it tells me Iām using characters that arenāt allowed when all Iāve used is letters and numbers, no special characters. It will always give me error messages that basically tell me Iāve not followed the password guidelines when Iām very careful to follow them exactly. This just started happening about 3-4 weeks ago I never had a problem before that and Iāve had the phone for almost a year now.
Hereās what Iāve done so far: soft reset then wiped the cache partition, uninstalled almost every downloaded app, cleared all browsing history including saved passwords and auto-fill and even turned both of those off in Settings. Last week I took the phone to the Samsung Repair Center in Plano, TX because I had a couple other issues as well and they removed the entire OS and reinstalled Android Lollipop 5.0.1.
I thought the problem was fixed because I was able to log into Google and set everything up but obviously it did not fix this problem.
Also the Samsung keyboard was always freezing and it didnāt fix that either, it still freezes even now while typing this email. Iām so frustrated because I canāt get into any of my accounts. Please help! ā Teresa
Solution: Hi Teresa. Did you install the exact same set of applications after Samsung reflashed the firmware? Thereās a chance that one of your apps may be hosting a malware or virus that may have compromised the operating system and your accounts. If the phone works normally right after the OS was wiped out and reinstalled, something youāve added afterwards is most likely to blame. Try doing these basic solutions to see which one will work for you.
Boot the phone in safe mode
Restarting in safe mode can help you narrow down possible factors because it prevents third party applications from running. Safe mode wonāt help you point which of your apps is the culprit. However, it will give you a general idea that one of them is behind this trouble.
Hereās how itās done:
- Turn off the phone completely.
- Press and hold the Power key and the Volume Down key.
- When the phone starts to boot, release the Power key but continue holding the Volume Down key until the phone finished restarting.
- Safe mode will be display at the lower left corner; you may release the Volume Down key now.
Keep in mind that some malicious apps may ignore safe mode to protect itself from being uncovered so if the problem continues even when on safe mode, proceed to factory reset.
Perform a factory reset
Doing a factory reset has many uses and in your case, it is to wipe out phone storage to make sure that you set it up clean again. Donāt forget to create a copy of your personal data (photos, videos, contacts, etc.) first before proceeding. If you havenāt done master or factory reset before, here are the steps to do it:
- Turn off the Galaxy Note 4 completely.
- Press and hold the Volume Up and the Home keys together, then press and hold the Power key.
- When the Note 4 vibrates, release both the Home and Power keys but continue holding the Volume Up key.
- When the Android System Recovery shows on the screen, release the Vol Up key.
- Using the Volume Down key, highlight āwipe data / factory resetā and press the Power key to select it.
- Now highlight āYes ā delete all user dataā using the Vol Down key and press the Power key to begin the reset.
- When the master reset is complete, highlight āReboot system nowā and hit the Power key.
- The Note 4 will restart but it will be longer than usual. When it reaches the Home screen, then begin your setup.
Because thereās no way for you to know which of your added apps is the problem, we recommend that you check for the problem after installing an app to identify the culprit. We know this solution will take time but itās the most effective way to deal with it.
Problem #4: Galaxy Note 4 āCould not do normal boot, mmc_read failedā error
Hi, this would be a lengthy post. (My apologies).
I updated to 5.1.1 recently via OTA update. Things were fine for about a few days. Suddenly, my phone keeps random rebooting, frequently crashes and freezing. Often when I power down, I cannot boot up the phone, and had to resort to taking out battery, doing soft reset, then boot up. Although this may require repeated tries).
Sometimes while booting up, the phone would boot to Odin mode saying āCould not do normal boot, mmc_read failedā. These persist even after I did factory reset and wiping of cache partition. My phone would even hang when Iām plugged into the charger. There would be a black screen and nothing comes up when I press the buttons. What exactly happened? Iām really at a loss and phone is out of warranty.
I tried to flash firmware via Odin but apparently unable to do so.
I found out the only way to prevent my phone from hanging, showing black screen or rebooting was to play the music player or watch video. Is this a software or hardware issue?
Iām really at a loss and itās really frustrating.
Really really would appreciate your reply and thanks in advance. ā Jake
Solution: Hi Jake. Did you try to make any operating system level modifications like rooting? If you did and that modification failed, the error āCould not do normal boot, mmc_read failedā usually shows up. Sometimes, a flash memory failure may also result to boot problems (usually due to rooting or OS modification). Unfortunately, thereās no way for us right now to know exactly whatās causing the boot failure problem.
Try to call your carrier and convince them that your phone needs to be replaced due to operating system bug.
If you want to fix the issue yourself, consider flashing a custom ROM to see if it will any difference.
Incredibly, Note 4 and my partner’s Note 3 are experiencing the ‘lag-freeze-reboot-mmc_read failed’ issue at the same time. This has to be an update issue, surely.
I’ve been waiting for the Note 8, but won’t be buying any Samsumg phones ever again if this turns out to be planned obsolescence.
I love the Notes. I’m really really hoping Sumsung sort this out.
As a previous post stated just take out the SD card and it will install, the clue is in the MMC_Failed line
Same problem as Jake… Problem#4
So how do I stop receiving this note 4 updates. Blocking it.
Hello Samsung Note 4
My phone has a BOOT PROBLEM, IT COULDNOT DO NORMAL BOOT
The following are the problems
” Could not do normal boot.
ddi: mmc_read failed
ODIN MODE (HIGH SPEED)
PRODUCT NAME: SM-N910F
CURRENT BINARY: Samsung Official
SYSTEM STATUS: Custom
REACTIVATION LOCK: OFF
KNOX WARRANTY VOID: 0X0
QUALCOM SECUREBOOT: ENABLE (CSB)
RP SWREV: S1, T1,R1.A1.P1
SECURE DOWNLOAD: ENABLE
YDCSTART
since the update….I now got could not do normal boot same story as all above… great just great
i was experiencing this same issue. For days I tried to get past the downloading screen. Even let it run overnight. My phone just one day wouldn’t turn on, it wouldn’t identify a charger, I switched batteries and it wouldn’t work. Plugged it into another charger and got the battery charging screen. When I turned it on It said downloading. So I let it download thinking it was updating and a few hours later still downloading. I couldn’t turn it off so I took out the battery, then couldn’t get it to turn on again or recognize a charger. I removed the batter again and held in the power button awhile then put the battery in and plugged it in and got the battery charging screen. When I powered it I got downloading so I just let it go. Got to work this morning and still downloading. So I removed the back and removed the battery again. Then decided to test something. I know sometimes computers fail to boot because of external drives so I removed the memory card. Put the battery in and hit the power button. It WORKED! If you are having this problem try removing the SD card. I hope this works for everyone. I am curious…please email me and let me know if it worked for you.
i just bought a used NOTE4 its N910F. i tried to factory reset it and it showed custom recovery like wipe cache, update from external source and below it DM verity error. i looked into it and found that its a rooted mobile. i looked at youtube tutorials but so far no luck now the mobile is pretty much useless to me. i wasted almost 3 months saving to buy a used mobile. any help in this regard will be highly appreciated. it showed mmc error, dm verity error and boot warenty kernal issues.
See my earlier post for background. My Note 4 was repaired under warranty. The motherboard and the screen were replaced by the repair subcontractor, Dynafix. The phone was reset to factory state so I had to reinstall all apps and so on. Now the phone seems to be faster than it was before it started exhibiting noticeable hangs.
It’s maybe time to start a class action (“recours collectif” in French) against Samsung for that Galaxy Note 4’s “mmc_read failed” failure caused by hardware failure of the main board (PCB) of that phone.
How could we do for starting that collective complaint?