unit freezing immediately after boot or in 1-2 mins after boot - MTCD Android Head Units Q&A

Hi,
I have a MTCD-KGL for over an year now. The only issue I have with the device is that after power up, sometimes, not always it freezes after start.
Precisely:
- This happens once every 2-3 boots
- This happens regardless if it does a real power up or wakes after a sleep
- The freeze usually happens 10-15 seconds after startup, however sometimes it might happen immediately or take up to 3-5 mins to freeze
- When I set it up to sleep instead of shut down (after car power off) and the radio app has been turned on before shutting down, after power up of the car and device it would usually start the radio app again and turn on the sound and freeze only after this. Same is true for my navi app (Here to go) i.e. it would start the navi app after boot and then freeze. Sometimes I'm able to make a click or two before it freezes
- If it makes cold start (i.e. had been shut down) then it shows the launcher UI
- When it's frozen I could reset it via the reset button, however I can't power it off via the power button
- When it's frozen, the touch screen doesn't respond at all, while hardware buttons only make beeping sound. However nothing changes, no matter what button I press. Turning the volume knob makes multiple beeps, however the volume doesn't change. Pressing back, home or anything else also makes beep but no effect
- Shifting to reverse doesn't show the revers comer either
I have updated to numerous different firmwares, both KGL and others as well numerous KGL MCUs, however with all combinations the problem persists.
The device is not rooted yet, I could do it if it would be from any help.
Any idea? I don't know what might be causing this freeze, which is keeping the last snapshot on the screen and buttons beep, radio plays, but nothing else happens. Apparently it's not software problem, because updates of the firmware and the mcu would have solved it. So it should be a hardware one. Any idea where to look at?
Thanks and regards
flyzepp

flyzepp said:
Hi,
I have a MTCD-KGL for over an year now. The only issue I have with the device is that after power up, sometimes, not always it freezes after start.
Precisely:
- This happens once every 2-3 boots
- This happens regardless if it does a real power up or wakes after a sleep
- The freeze usually happens 10-15 seconds after startup, however sometimes it might happen immediately or take up to 3-5 mins to freeze
- When I set it up to sleep instead of shut down (after car power off) and the radio app has been turned on before shutting down, after power up of the car and device it would usually start the radio app again and turn on the sound and freeze only after this. Same is true for my navi app (Here to go) i.e. it would start the navi app after boot and then freeze. Sometimes I'm able to make a click or two before it freezes
- If it makes cold start (i.e. had been shut down) then it shows the launcher UI
- When it's frozen I could reset it via the reset button, however I can't power it off via the power button
flyzepp
Click to expand...
Click to collapse
Its an older unit and I would tend to think that your system is running out of memory.
I tried doing a System Update on mine but the dang head unit can't find the .img file in any slot nor usb port.

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DesperadoX93 said:
Sometimes my handy randomly lock and unlock. It's like the power button gets pressed automatically. also sometimes the APM shows up, and if i press back, it appears again and again, mostly 3 times, then the system starts new.only the system. If i charge it, the screen also randomly shows lock screen and a second later it's dark again.
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Click to expand...
Click to collapse
Hi,
Sounds more like a problem with the actual power switch to me, but perhaps the following thred will be helpful for you. I haven't read through everything, but some of the posts report similar issues.
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Boot logo shows GT-I9300T
Back cover and system info says GT-I9300
Android version 4.1.2
Baseband version I9300XXELKC
Kernel Yank555 JB 3.0.54
Build number null_10
Network: Vodafone Australia
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Press volume up three times (phone goes beep beep beep)
Press power button
wait three seconds
Press power button
Unlock
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Press power button
wait TEN seconds
Press power button
Unlock
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http://pastebin.com/guJjdTwp

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My phone keeps freezing

It used to happen every few days, not a massive deal, but it's happened five times today. Including overnight, meaning my alarm failed to go off.
Ambient display stays on - sometimes the clock even keeps running - but none of the buttons do anything. Only escape is press and hold power until it reboots. Or, sometimes I'll be doing something on the phone and it'll just completely freeze. Again, press and hold power is all I can do. Weirder, sometimes I can click on an app, and it'll just pull up the start of the load screen for that app, I can hit home or switch apps and that acts fine, it just won't actually open any of my apps or do anything in them. Again, have to press and hold power to reboot.
Rooted, Android 12, no other modifications to the OS that I'm aware of.
koberulz said:
It used to happen every few days, not a massive deal, but it's happened five times today. Including overnight, meaning my alarm failed to go off.
Ambient display stays on - sometimes the clock even keeps running - but none of the buttons do anything. Only escape is press and hold power until it reboots. Or, sometimes I'll be doing something on the phone and it'll just completely freeze. Again, press and hold power is all I can do. Weirder, sometimes I can click on an app, and it'll just pull up the start of the load screen for that app, I can hit home or switch apps and that acts fine, it just won't actually open any of my apps or do anything in them. Again, have to press and hold power to reboot.
Rooted, Android 12, no other modifications to the OS that I'm aware of.
Click to expand...
Click to collapse
Backup all your data while you can, you may be in the beginning stages of hardware failure. Some people with the following problem had freezes before the phone failed completely.
[FIX] Pixel 3 QUSB_BULK_CID:xxxx_SN:xxxxxxxx
Hi, I have a Pixel 3 that won't turn on, won't charge, won't get into recovery mode, and gets recognized as QUSB_BULK_CID:xxxx_SN:xxxxxxxx when connected to a pc. I am an ignorant regarding phones, flashing, etc... Is there any way of getting...
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If that is not your problem, completely wiping the phone and flashing a new image may help.
It's been years at this point, I'd be very surprised if it all suddenly died in a way connected to this. There's nothing on my phone that's critical that I don't have backed up, though.
Not sure if there's any way to determine if I might have or get the EDM thing?
koberulz said:
It's been years at this point, I'd be very surprised if it all suddenly died in a way connected to this. There's nothing on my phone that's critical that I don't have backed up, though.
Not sure if there's any way to determine if I might have or get the EDM thing?
Click to expand...
Click to collapse
Not until it fails.

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