Bartók Apex locked up

For the second time this week, my Bartók has shown an unusual screen and became unresponsive.
Pressing any of the buttons on the front of the unit, and the Mosaic app has no effect. Totally locked up.
The only way to unlock it, is to switch the unit off, then back on again.
For the life of me I can’t remember how I left the Bartók. I think I was in the middle of changing the settings in Audio, then got distracted in the house. When I came back several hour later, the Bartók displayed this screen.


Was it simply the fact that I’d left the Bartók in limbo, that caused it to lock up and display the said screen?

App version 1.4.4(161)
Front Panel version 2.01
Control Board 2.01
Network Board Version 1.4.4 (529)

Yes, leave it in limbo while distracted in the house, and you are doomed :grinning_face_with_smiling_eyes:

You managed to solve it :+1:

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Happens to me too every now and then. For no apparent reason. Just locks up just like yours. Hard reset with power off/on solves it. No big deal for me. I chalk it up to the small quirks present in virtually every software or firmware. That’s life.

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Yeah, I had that problem with my Rossini before the APEX upgrade. As part of that upgrade, they replaced the wire bridge between the DAC board and the control board, and since then no more freezes. Something to ponder.

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Just did it again today.
A period of inactivity again, of around 3 hours.

I know, I know…”why didn’t I turn it off after my listening session”? I turned the amp off but forgot the Bartók. :face_with_peeking_eye:

Perhaps this is a protection thing, built in?

Blimey, hope I haven’t got to do that.
Was your Rossini playing/in use at the time, or was it left on without activity?

I’ve had this happen a few times. The issue for me at least seems to be tied to the power going out, or flickering but not quite going out. A hard reset seems to fix the problem

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Thanks @Urbanluthier

Full power here, no power cuts.

dCS support may be able to help guide you

I’ve tried to figure out a pattern, but I don’t think there was one - it just happened at random moments I think. Note that the “fix” didn’t have anything to do with the APEX upgrade, it was just done at the same time since the DAC was opened up anyway. (I was in touch with dCS at the time because of this problem, and they advised the technician as to what to replace. It seems their hunch was right.)

Same here. No pattern. And very rare,maybe once a month or so or even less. As said,it doesn’t bother me. And FWIW,mine is always on standby too,so always powered on.

I agree, and had the same issues rather regularly by the past with my Bartók, at least twice a month.
Since I’ve made installed a dedicated power line for my HiFi system and added a power conditioner 5-6 years ago, problem gone.
I don’t know which helped the most between the dedicated power outlet and the conditioner though, as I got them the same week or so…

Yeah, I think the Bartok has software bugs. I have noticed about 4 things.

  1. Sometimes the remote doesn’t work. This has happened even from a fresh start.
  2. It goes into Mickey Mouse mode. If I’m switching songs that change the sample rate, it will play at twice the speed.
  3. Similar to no. 2, it will play twice as slow. Maybe 4 times slower.
  4. After a long listening session, the Mosaic app will start to be sluggish. Then soon after, it will lock completely. The music even stops.

All these are rare and unrepeatable. The only solution is to turn off and on again.

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Good morning @StoogeMoe

Re the above quote, are you referring to Mosaic locking up, or the Bartók?

@Erwan @ @Paul_Bemelmans @SneakyPete @Urbanluthier
So it happened again yesterday. But again, it was only after a long period of inactivity. 3 plus hours.

My fault, I shut the Vitus Amp down, but forgot to open Mosaic on my iPhone and shut down the Bartók. I know I can use the power button on the front of the unit.

For those affected by this glitch, do we think it’s a built in software safety feature, when there is a long period of inactivity? My Bartók only locks up when left on for a long period of inactivity.
Other than that, it performs flawlessly.

Not your fault David, no matter how long you leave the unit switched on, nothing untoward should happen to normally operating units - I use my Bartok practically every working day and it has never demonstrated such behavior regardless of being left on for days.

I highly recommend that you get your dCS Dealer to look into this.

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Yes, I think most (if not all) of the above mentioned symptoms are an indication that the control board has frozen. At that stage,

  1. the DAC is still working - if the currently-playing stream has the same sample rate as the one playing when the control board was still working, you might not notice
  2. the display is also either stuck on a previous song or is not working altogether
  3. when a new song starts, if the sample rate is different then odd behaviour will manifest; the song plays either too fast or too slow since the control board fails to notify the DAC of the correct sample rate
  4. the Mosaic app fails to talk to the unit

A reboot will temporarily remedy the situation, but I’d say this is a dCS service issue.

@Merlot52 and @StoogeMoe , the kind of faults you report are not common nor are they easily repeatable by others. Because of this it is difficult to track down likely causes and suggest fixes via this medium.

I agree with @Paul_Bemelmans and @Anup that your Bartok therefore needs to be referred to your dealer who cam arrange servicing.

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Hi David,
Sorry but looks like a faulty unit to me as well.
That’s way too many hang-ups whether you let your Bartók in standby or not…

I think many of us leave our units on all day long with no issue. I know I leave my Bartok on from first thing in the AM until just before bed many days with no issues. dCS support should be able to guide you

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