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Canon EOS R5 / R6 overheating timers, workarounds, and Magic Lantern


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Ok, here are new thouht after thinking a bit.

Something is bothering me is the recovery time.
Even without regular camera battery, or by pushing the time.
The recovery time is not reduced.

If it was just a flag to a memory that start to count, it will not be able to know how long the camera was actually off.
It have to be a counter, not just a date stamp difference.
This overheat counter IS inside this chip for sure. cause it can't hold 2 different date and the internal counter are quite limited.

Either the current overheat time is written inside a eeprom, and so compare on boot, either there is a timer that keep running even without battery.
After 2 hour of "fake cool down"; the camera is powering again and check the value of this counter. If it reached the end, you can go again. If not, you have to wait.
The second possibility is that the camera compare the time on boot and do a simple subtraction to know if the elapsed time is enough. The various test kind of shows that it is not working.

To make sure about the second possibility and twist it a bit
I would love someone to do a simple test.
Put the camera on overheat and lock (after 20mn recording video) and keep the battery door open with the scerw hack or use dumb battery the entire time
Change the date  or time to move it to the next day.
Now, try 2 different things:

Remove the camera battery with the drop system. Is restarting check the new day? (But not the flag?)

Or simple turn off the camera, remove the battery and start again. is the second restart is able to do the math between both time? (So the overheat time is stored on eeprom/a counter is runnin during no battery time)

Does it makes sense to test this?








 

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No, No need to do anything It's very simple. Canon do a very simple calculation. When camera is running, a counter is setup. When the counter reach a certain level, you have a warning logo.

Just confirmed that the Date change "hack" is still live with New firmware on R5. 

Ok, my trick works apparently. Tested by yourboylloyd on Magic Lantern Forum Record as you wish. When overheat occur. stop recording. Change the date. Drop the power (using the screw story or

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Ok, my trick works apparently. Tested by yourboylloyd on Magic Lantern Forum

Record as you wish.
When overheat occur. stop recording. Change the date.
Drop the power (using the screw story or dumb battery)
Put it back.
Timer is gone!
All camera parameters are saved. No need to open the camera, no need to lose your clip.
BOOOMMMMM
https://www.magiclantern.fm/forum/index.php?topic=24827.msg230515#msg230515

 

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1 hour ago, Emanuel said:

WOW If it steadily works, I'll buy immediately one! : P

Well, one tester is not enough, please try to do the experience if you have a R5.
The procedure is explained here.
https://www.visionrouge.net/canon-r5-overheating-hack-solved/

In short:
- Power the camera with a external battery and close the door beside the R5 (you can also do the screw trick if you like)
- Record video until you see the overheating logo, or even until the camera shut down.
Turn off the camera by using the power button so your recording parameters (ISO and so one) are saved.
- Turn back on the power.
- Go to the menu, Change the time of the day to +3 hours at least (or add a day)
- Drop the power by disconnecting the external battery
- wait 30 seconds
- Put back the external battery. the overheat issue should be gone.
(if not, you may actually be in real overheat situation), try in 10mn...
Please share your findings.

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26 minutes ago, visionrouge said:

Well, one tester is not enough, please try to do the experience if you have a R5.
The procedure is explained here.
https://www.visionrouge.net/canon-r5-overheating-hack-solved/

In short:
- Power the camera with a external battery and close the door beside the R5 (you can also do the screw trick if you like)
- Record video until you see the overheating logo, or even until the camera shut down.
Turn off the camera by using the power button so your recording parameters (ISO and so one) are saved.
- Turn back on the power.
- Go to the menu, Change the time of the day to +3 hours at least (or add a day)
- Drop the power by disconnecting the external battery
- wait 30 seconds
- Put back the external battery. the overheat issue should be gone.
(if not, you may actually be in real overheat situation), try in 10mn...
Please share your findings.

For sure and no, I don't have it as written, hence my "if" :- )

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2 minutes ago, Jn- said:

Congratulations @visionrouge well done👍.

1) Can I assume it that normal exFat can be used instead of fat32? i.e. the batter/power drop does not need to be done mid recording?

2) While in phase 2 i.e. with R5's date time now set say 1 day ahead is it necessary to increment by another day again if after doing a second batter drop, phase 3?

 

 

This is primary tested by one user, he put all his camera details as reference. Please wait to get backed and test with the Firmware 1.1 also.

1) I really don't see why the card format should have any impact there as the camera is not recording during the shut down. This time, this is just the date/stmap that is modified and not read at this specific boot.

2) Yes, at each time your camera is displaying the overheat logo, you need to increment to the next day, hours, month, year. But if your camera, during lunch break is able to cool down by itself anyways, you can put back any date. The idea is to trick the timer only when overheating flag is on. The camera at boot look at (current time - overheat warning time). if it's more than the predefined "fake recover time" you are good to go.

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2 hours ago, visionrouge said:

- Power the camera with a external battery and close the door beside the R5 (you can also do the screw trick if you like)

Hey dude

Nice job. Have you tried the Canon EOS R5 vertical battery grip yet? Can you pull the battery out of that and it pulls power from the camera like an external battery does?

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Hi Andrew I advise you to do new tests with the new firmware ... now the overheating is sensitive to temperatures ... I shot half a day in the cellar with temperatures of 12 degrees and I had no overheating, always running at 120 fps, this guy has demonstrated that by putting the fans and cooling the area of the cards can run without overheating ... even when the light appears after the ventilation goes off and continues to record.
https://www.youtube.com/watch?v=_K5HG1rlnVc

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Just now, Andrew Reid said:

Hey dude

Nice job. Have you tried the Canon EOS R5 vertical battery grip yet? Can you pull the battery out of that and it pulls power from the camera like an external battery does?

I do not have a R5, another user MagicLantern user did it for me if you check my posting.
https://www.visionrouge.net/canon-r5-overheating-hack-solved/
The battery grip will act as a regular battery, so it's a no go. It hold the same door switch as I have understand.
You can either use the screw in the door idea or use the dumb battery option that I prefer.
 

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7 minutes ago, danieleciraolo said:

Hi Andrew I advise you to do new tests with the new firmware ... now the overheating is sensitive to temperatures ... I shot half a day in the cellar with temperatures of 12 degrees and I had no overheating, always running at 120 fps, this guy has demonstrated that by putting the fans and cooling the area of the cards can run without overheating ... even when the light appears after the ventilation goes off and continues to record.
https://www.youtube.com/watch?v=_K5HG1rlnVc

Yes it does seem Canon are bothering to make it look like they measure actual temps!!

Thanks for your discoveries.

Maybe the Tilta fan cage will work after all?

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5 hours ago, visionrouge said:

Ok, my trick works apparently. Tested by yourboylloyd on Magic Lantern Forum

Record as you wish.
When overheat occur. stop recording. Change the date.
Drop the power (using the screw story or dumb battery)
Put it back.
Timer is gone!
All camera parameters are saved. No need to open the camera, no need to lose your clip.
BOOOMMMMM
https://www.magiclantern.fm/forum/index.php?topic=24827.msg230515#msg230515

 

Awesome job! I agree with your follow-up comments on the ML forum - based on your workaround working the camera is storing a future-based RTC timestamp for the available recording/cooldown (current time + interval) rather than a relative time or a simple flag. I'm guessing this wont work in V1.1 firmware since Canon changed the logic to sample the temp more frequently during the active session, which would give preference to the actual temp sampled rather than the previous session's timer setup. However it's still worth a shot because maybe Canon was a bit clumsy with the change.

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4 hours ago, visionrouge said:

I do not have a R5, another user MagicLantern user did it for me if you check my posting.
https://www.visionrouge.net/canon-r5-overheating-hack-solved/
The battery grip will act as a regular battery, so it's a no go. It hold the same door switch as I have understand.
You can either use the screw in the door idea or use the dumb battery option that I prefer.
 

Well, well - actually I did test it with my R5. Firmware 1.1.0 - and guess what: it works like at charm.

Let the camera overheat in the 120fps mode. Camera gets really warm. I guess I had something like 20 minutes in total (had to erase the clips from my card again and again). Anyway, after the camera overheated I opened the battery door, blocked the little latch to make the camera think it was closed. Went into the menue, forwarded the date by one full day. Confirmed. Took the battery out, waited some 15 seconds. Put the battery back in, closed the battery door. And here it was: Camera still warm after a short pause of 2 minutes (the time it took to go through the procedure) and what do I see in the display: Full recording time, no overheating sign. LOL. Canon, You've got a loophole there. Does the camera even bother to measure zhe temperature at all?!

Say thank you to yourboylloyd on Magic Lantern Forum.

Chris

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19 minutes ago, Coffe said:

Well, well - actually I did test it with my R5. Firmware 1.1.0 - and guess what: it works like at charm.

Let the camera overheat in the 120fps mode. Camera gets really warm. I guess I had something like 20 minutes in total (had to erase the clips from my card again and again). Anyway, after the camera overheated I opened the battery door, blocked the little latch to make the camera think it was closed. Went into the menue, forwarded the date by one full day. Confirmed. Took the battery out, waited some 15 seconds. Put the battery back in, closed the battery door. And here it was: Camera still warm after a short pause of 2 minutes (the time it took to go through the procedure) and what do I see in the display: Full recording time, no overheating sign. LOL. Canon, You've got a loophole there. Does the camera even bother to measure zhe temperature at all?!

Say thank you to yourboylloyd on Magic Lantern Forum.

Chris

Can you please confirm the camera lets you record after the procedure for the full indicated time?

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19 minutes ago, horshack said:

Can you please confirm the camera lets you record after the procedure for the full indicated time?

After the date change and the battery drop the camera restarted without any overheat warning, I wasn't locked out anymore and I got the full amount of filming time for my CFexpress card. Camera recorded after pressing REC. So I haven't tested yet if it gives me another 20 or 25 minutes, but I will try it in a bit, once it has cooled down again.

Keep you posted. 

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But this is interesting: There is another overheat symbol appearing after 15 minutes into my seconf 120fps run: one without the camera, a thermomter only. After stopping and taking out the card (leaving in the SD card) the symbol turns white. It disapears after taking out the (very hot) CFExpress card. So it seems to be an overheat warning for the CFExpress card.

 

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4 minutes ago, Coffe said:

But this is interesting: There is another overheat symbol appearing after 15 minutes into my seconf 120fps run: one without the camera, a thermomter only. After stopping and taking out the card (leaving in the SD card) the symbol turns white. It disapears after taking out the (very hot) CFExpress card. So it seems to be an overheat warning for the CFExpress card.

 

That's the overheat warning for stills operation. Page 284 of Canon R5 manual.

Can you do me a favor and take a photo next time you see that stills warning? I'd like to check the camera's temperature for that threshold. It's embedded in the EXIF of stills images - you can send me a link to the out-of-camera image so I can extract it. Thanks!

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41 minutes ago, horshack said:

That's the overheat warning for stills operation. Page 284 of Canon R5 manual.

Can you do me a favor and take a photo next time you see that stills warning? I'd like to check the camera's temperature for that threshold. It's embedded in the EXIF of stills images - you can send me a link to the out-of-camera image so I can extract it. Thanks!

This is Pictogram. I took a foto with my R5 close to that moment:  R5CM0963.JPG

Not pretty - but it should have the precious temperature reading you're looking for 🙂

Next time I will take that picture once I see the symbol again. It comes in red and also in white. And it disapeared seconds after I took out the CFExpress card.

20200906_203605.jpg

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