Bambu Firmware Bug Reporting Thread

makerdude · May 3, 2024, 7:26pm

Problem: LAN mode not working
Firmware Version: 01.05.02.00
Printer: Bambu Lab P1S

Steps to reproduce:

Navigate to the “Settings” section
Select “WLAN”
Select “LAN Only Mode”, then select “yes”
Now open Bambu Studio on your device, and navigate to “Device”

Now there is no option to operate the printer in LAN mode, rendering the LAN mode completely useless. Also, turning it to LAN mode unbinds it from your Bambu account, and makes it very difficult to rebind it. I really want to see this fixed, so I don’t have to use a micro sd card for printing things.

finarda · June 12, 2024, 8:23pm

Problem : Upgraded firmware now it won’t turn on
Firmware Version : ??
Printer : Bambu Lab A1
Steps to reproduce : N/A

The power indicator at the back ahows a light but the front power indicator doesn’t, nor does the display turn on.

lngtmg · June 22, 2024, 10:05am

Problem: PA profiles are lost after power outage
Firmware Version: 01.08.00.00
Printer: Bambu Lab X1-Carbon
Steps to reproduce:

Perform Flow Dynamics calibration for a filament
Start printing any model from that filament using created PA profile
Turn printer off simulating power outage
Turn printer on
Resume printing
Check PA profile for the filament is “none” and there is NO way to adjust it without canceling the print job
As a result, observe corrupted model

Other information:
For some filaments and models the result of resuming the job may be acceptable but most of the time the printed item is trashed.

I’d expect 2 ways of fixing the issue:

Give a way to adjust PA profile after power outage before resuming the print
Fix the firmware in a way that PA profiles are not lost after power outage

Thank you!

lkraus · June 22, 2024, 2:26pm

While you are waiting for a fix, use OrcaSlicer to enable PA and set your PA values in the User filament profiles. These settings will not go away with a power outage. If you allow Studio and OrcaSlicer to sync profiles through Bambu cloud, Studio will use those values in the g-code it generates, overriding any K values shown on the device tab. Makerworld models sliced in the Bambu cloud and printed without using Studio will NOT use the user presets.

Bugs reported here are seldom seen or acted on by the Bambu developers. They are a bit more responsive to issues posted on Github.

lngtmg · June 22, 2024, 6:00pm

@lkraus Thank you very much for the hint with OrcaSlicer. Will try it.
Reported the bug on Github as well.

Cheers!

user_219516602 · July 3, 2024, 6:43am

A1 loosing connection to Bambu Studio after upgrades
Ok here is exactly the scenario, Printer in LAN mode only. File is sliced and send to printer via wifi. After the file is sent to the printer successfully. The printer looses connection with bambu studio and displays a “Wrong Password” error message.
The printer having received the file begins to process the print. But Bambu Studio can no longer communicate with the printer until I re-enter the password and then it will connect and start working normally.
This happens every time I send a print.

The Print does run successfully but this is something I haven’t seen before
Thanks

Compiler · August 5, 2024, 4:44am

This is on a P1S latest firmware 01.06.01.00 (20240722).

The machine can crash the Z axis on the top of the machine.

This happens for example if you do a factory reset when the bed is near the top. On power-on fresh it will quickly move the bed upwards and smash in to the top, grinding away. Sounds horrible of course.

CMD · August 8, 2024, 7:11pm

Problem: MQTT print speed setting type confusion bug
Firmware Version: 01.06.01.00 (P1 series)
Printer: P1 series, but might affect others too
Steps to reproduce:

Connect to the printer via MQTT.
Send the following command to set the print speed to an incorrect value:

{
    "print": {
        "sequence_id": "0",
        "command": "print_speed",
        "param": "A" // this is usually a string containing
                     // a number from 1 (silent) to 4 (ludricious)
    }
}

Observe the speed value shown on the printer and inside Bambu Studio / Bambu Handy. Notice that it has a strange value (in my case, 254% and 510%).

I also opened a topic on this issue here.

DigDaddySandy · August 28, 2024, 3:00am

I had the recent upgrade date of this post is 27Aug2024. After the upgrade from my stock printer purchased last month I started to fail on every initial layer. Or so I thought. I decided to print a 3 layer rectangle and observe the print operation. The first layer was perfect. Th system finished the first layer and the I hit pause. n ot know that teh Lydar had to do its thing first. Once the lydar scan was done the hot end wen to the park location in the back of the printer. I took some photos and was surprised that the layer was great. I hit continue and noticed that the hot end chagned to 90 Deg C and started to cool and attempt to lay PLA. I shut down the printer becuase I did not want the hot end to get damaged. I thought there was a control to prevent cold extrusion. It would appear tha this firmware update has something wonky with it.
Now I know after looking at my failed first layers that the residual PLA on the Hotend wouidl cool down and scrape off the first layer. I remeber hearing a sort of grinding should which I thought was due to the speed. Mind you . i have not been printing other than with Bambe Basic PLA and stock parameters.
My first print out fo the system before the upgrade was great.
I’m about to do a stock benchy print to see if that resolves the issue.

If anyone has any recommendation or knows where in the software the GCODE is change to allow for cold extrusion and set the temperature to 90 deg C after the first layer print your help would be much appretiated.

Ty and have a blessed day!

DigDaddySandy · August 28, 2024, 3:04am

FYI I reveted to the previous Firmware. Runing the benchy with that software from the X1 carbon printer interface.

DigDaddySandy · August 28, 2024, 3:13am

After reverting to the old firmware my printer is back to stock. I do not recommend upgrading the firmware at all!

Griffin2020 · September 2, 2024, 3:33am

Problem: Printer cannot see network after updating firmware
Firmware Version: 01.08.02.00
Printer: X1C
Steps to reproduce: Update firmware to 01.08.02.00.
Printer does not show any of the locally visible SSIDs that it saw prior to the firmware update.

Griffin2020 · September 3, 2024, 3:28pm

Factory reset solved issue with network visibility.

DeVerm · September 3, 2024, 3:36pm

Problem: display heating icons inconsistent
Firmware Version: current
Printer: Bambu Lab X1-Carbon
Steps to reproduce:

The heating indicator for the nozzle seems to light up in orange in sync with Bambu Studio showing the same, but for the bed heater this isn’t the case. I normally see the heater status being off on the display while it is on in Bambu Studio. It appears the sttus in Bambu Studio is correct and the x1c display is not.

LoboThirteen · September 3, 2024, 11:17pm

There is a bug in the display of the percentages of the chamber and auxiliary fans in Bambu Studio and Bambu Handy… For certain percentages that are specified in the filament profile, an incorrect value is displayed in the apps… However, the fans still have the correct speed…

Printoid · November 17, 2024, 2:05pm

@BambuLab Firmware Bug report X1C

Problem: Video feed crashes (stops) when switching resolution during an active print. Requires a printer power cycle / reboot to start working again.

Printer: X1C
Firmware Version: 01.08.02.00
Filament used: Bambu Basic White PLA (shouldn’t affect this issue)
problem: Using Handy (possibly also using Studio) switch video resolution from 1080P to 720P during an active print. Notice camera video feed stops and wont work again until the printer is power cycle rebooted.

Perhaps others can try this to see if it also occurs, or if you can get it to be 100% reproducible to allow it to be easier to fix.

This seems to happen more than once, although I have tested it at other times and it’s not 100% repeatable for me!

During an active print started via Handy on my X1C, I noticed the camera brightness was off too far (I have a riser with an LED strip installed). When this happens, if I switch the video resolution it tends to reset the camera and resolves the brightness issue. (the camera image brightness issue could be a bug report on its own, but this is not the reason for this particular post).

The issue occurs when using Bambu Handy to switch the video resolution from 1080P to 720P WHILE a print is in progress. The camera video feed now fails, and I see an error message on my printer (0c00-0100-0002-0008-074616) “Failed to get image from chamber camera. Spaghetti and waste chute pileup detection is not available for now.”

I can never get the video feed to respond again until after the print is completed and then I power cycle my printer.

So obviously, switching the video resolution (using Handy) during a print seems to cause something in the printer to stop responding.

I’ve seen this maybe two or three times. It just happened again now. Printer is using firmware 1.08.02.00. Handy is up to date Android version 2.15.5.

Support ticket with logs has been submitted: Ticket number US241116638002

Steps to reproduce:

Start a print using Handy (it may also occur using Studio).
While printing, in the device tab use the hamburger menu to select “Record Settings” then change the video Resolution from 1080P to 720P.
Notice the error message. And the video feed stops and can’t recover without power cycling the printer. Note that this is not 100% reproducible, so many attempts may be needed.

Expected Behavior:

During an active print, the camera video resolution changes from 1080P to 720P and the video feed doesn’t stop.

This should also work properly if changing from 720P to 1080P. during an active print.

Alternatively, If the printer is not supposed to handle switching video resolution during an active print session: Do not allow a video resolution change during an active print (both in Bambu Handy and Bambu Studio).

Printer: X1C
Firmware Version: 01.08.02.00
Filament used: Bambu Basic White PLA (shouldn’t affect this issue)
How to duplicate: Using Handy (possibly also using Studio) switch video resolution from 1080P to 720P during an active print.

walangpart2 · February 11, 2025, 9:50am

Problem: Incomplete Homing Process
Firmware Version: 01.04.00.00
Printer: Bambu Lab A1
Steps to reproduce:

Reboot The Machine
Navigate to the Control/XYZ section
Press Any Key (e.g -x, x, -y, y, z up z down). A homing prompt will appear. Press the Home labeled button.
Observe Homing Process
Notice that the homing process seams to have been finised but when you try to adjust x, y, z again the Homing Prompt appears again telling you that toolhead is not homed. Pressing the Home Labeled button will not home the printer either.

Other information:
If the “bug” didn’t execute and the homing process is successfull ( meaning after the homing process you can freely control xyz), Execute the steps again and again until you come to a point that the “bug” appears.

Suggestion
Also Add A simple Animated Prompt during the homing process

RobWal · April 21, 2025, 1:43pm

Had my P1S since Nov 2024 and recently updated the Studio software twice lately and been having tons of issues, wasted nearly a full roll of black (not sticking to the bed, stringing amongst other things), tried a Lightbox for the Grandaughter and it was horrible. My wife mentioned the updates and she has yet to do hers on her A1mini, searched and come across your post. I found my original Studio software and reinstalled it and everything is back good again and I can see my moisture levels on the AMS’s again, I thought the quality of what I was doing was getting worse and I had upgraded my hotend and a few other bits thinking it was that so thanks for you post - I hope others will read it with my reply. Now I have to wait for the black to back in stock again over 2 weeks out of stock now !!!

user_102303967 · April 22, 2025, 11:39am

Bug Report: Print cooling fan behavior doesn’t match G-code on A1 mini (Firmware 01.04.00.00)

Printer: Bambu Lab A1 mini
Firmware version: 01.04.00.00
Material: PETG
Slicer 1: OrcaSlicer 2.3
Slicer 2: Bambu Studio 2.0.2.57
Model: (attached)

Issue summary:

During overhang printing, the cooling fan (M106) behaves inconsistently with the G-code and preview.
The fan:

may turn off too early,
or never turn on,
or turn on briefly but revert instantly to a previous value.

This results in poor cooling during narrow or long overhangs.

More details here

CyberLab · April 22, 2025, 5:19pm

Problem: Print doesn’t start
Firmware Version: 01.08.50.188
Printer: Bambu Lab X1-Crabon
Steps to reproduce:

send any job to printer or open a job already on SD/internal memory
Start job
It doesn’t start. Error code : 0500-4003 004923 / 0500-4003 190622

Other information:
Bambulab Studio version 2.02.57