Just found out another thing. In spite of successful print, if I start printing the same job right after finished one the first layer becomes a mess. But if I restart printer by switching the power off an on the model is being printed with no issues.

M122
=== Diagnostics ===
RepRapFirmware for Duet 3 MB6HC version 3.2 running on Duet 3 MB6HC v1.01 or later (SBC mode)
Board ID: 08DJM-956BA-NA3TJ-6J9D8-3SN6T-1AAYV
Used output buffers: 1 of 40 (12 max)
=== RTOS ===
Static ram: 149788
Dynamic ram: 63740 of which 168 recycled
Never used RAM 145136, free system stack 126 words
Tasks: Linux(ready,83) HEAT(blocked,296) CanReceiv(blocked,809) CanSender(blocked,335) CanClock(blocked,352) TMC(blocked,19) MAIN(running,717) IDLE(ready,19)
Owned mutexes: HTTP(MAIN)
=== Platform ===
Last reset 01:28:13 ago, cause: power up
Last software reset at 2021-01-22 22:12, reason: User, GCodes spinning, available RAM 145212, slot 2
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x00400000 BFAR 0x00000000 SP 0x00000000 Task Linu Freestk 0 n/a
Error status: 0x00
Aux0 errors 0,0,0
Aux1 errors 0,0,0
MCU temperature: min 27.3, current 37.9, max 38.0
Supply voltage: min 24.0, current 24.2, max 24.3, under voltage events: 0, over voltage events: 0, power good: yes
12V rail voltage: min 12.2, current 12.3, max 12.3, under voltage events: 0
Driver 0: position 52000, standstill, reads 14513, writes 31 timeouts 0, SG min/max 0/1023
Driver 1: position -50400, standstill, reads 14512, writes 32 timeouts 0, SG min/max 0/1023
Driver 2: position 12153, standstill, reads 14498, writes 46 timeouts 0, SG min/max 0/1021
Driver 3: position 0, standstill, reads 14498, writes 46 timeouts 0, SG min/max 0/1023
Driver 4: position 0, standstill, reads 14498, writes 46 timeouts 0, SG min/max 0/1023
Driver 5: position 0, standstill, reads 14499, writes 46 timeouts 0, SG min/max 0/1023
Date/time: 2021-01-23 19:26:43
Slowest loop: 175.45ms; fastest: 0.04ms
=== Storage ===
Free file entries: 10
SD card 0 not detected, interface speed: 37.5MBytes/sec
SD card longest read time 0.0ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 125, maxWait 134829ms, bed compensation in use: mesh, comp offset 0.000
=== MainDDARing ===
Scheduled moves 4010, completed moves 4010, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 4], CDDA state -1
=== AuxDDARing ===
Scheduled moves 0, completed moves 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== Heat ===
Bed heaters = 0 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1, chamberHeaters = -1 -1 -1 -1
Heater 0 is on, I-accum = 0.0
Heater 1 is on, I-accum = 0.0
=== GCodes ===
Segments left: 0
Movement lock held by null
HTTP* is doing "M122" in state(s) 0
Telnet is idle in state(s) 0
File* is idle in state(s) 0
USB is idle in state(s) 0
Aux is idle in state(s) 0
Trigger* is idle in state(s) 0
Queue* is idle in state(s) 0
LCD is idle in state(s) 0
SBC is idle in state(s) 0
Daemon is idle in state(s) 0
Aux2 is idle in state(s) 0
Autopause is idle in state(s) 0
Code queue is empty.
=== CAN ===
Messages queued 235551, send timeouts 0, received 63653, lost 0, longest wait 2ms for reply type 6031, free buffers 48
=== SBC interface ===
State: 4, failed transfers: 0
Last transfer: 1ms ago
RX/TX seq numbers: 1465/1465
SPI underruns 0, overruns 0
Number of disconnects: 0, IAP RAM available 0x2c8a8
Buffer RX/TX: 0/0-0
=== Duet Control Server ===
Duet Control Server v3.2.0
Code buffer space: 4096
Configured SPI speed: 8000000 Hz
Full transfers per second: 48.83
Maximum length of RX/TX data transfers: 2880/1684

M122 B121
Diagnostics for board 121:
Duet TOOL1LC firmware version 3.2 (2021-01-05)
Bootloader ID: not available
Never used RAM 4032, free system stack 50 words
HEAT 86 CanAsync 89 CanRecv 83 TMC 54 MAIN 218 AIN 64
Last reset 01:28:35 ago, cause: power up
Last software reset data not available
Driver 0: position 2810351, 415.0 steps/mm, standstill, SG min/max 0/112, read errors 0, write errors 0, ifcnt 16, reads 36525, writes 16, timeouts 0, DMA errors 0
Moves scheduled 214161, completed 214161, in progress 0, hiccups 0
No step interrupt scheduled
VIN: 24.1V
MCU temperature: min 56.6C, current 70.4C, max 74.8C
Ticks since heat task active 1, ADC conversions started 5294991, completed 5294990, timed out 0
Last sensors broadcast 0x00000002 found 1 5 ticks ago, loop time 0
CAN messages queued 63941, send timeouts 0, received 262230, lost 0, free buffers 36

@Phaedrux z_fullcurrent.g xy_fullcurrent.g e_fullcurrent.g

V350_20mmTestCube_repaired_no_relative.gcode

@Phaedrux said in Firmware downgrade:

And when sliced with absolute extrusion it works fine?

Yes. I stopped printing after 2 successful layers.

M122
=== Diagnostics ===
RepRapFirmware for Duet 3 MB6HC version 3.2 running on Duet 3 MB6HC v1.01 or later (SBC mode)
Board ID: 08DJM-956BA-NA3TJ-6J9D8-3SN6T-1AAYV
Used output buffers: 1 of 40 (11 max)
=== RTOS ===
Static ram: 149788
Dynamic ram: 63740 of which 92 recycled
Never used RAM 145212, free system stack 128 words
Tasks: Linux(ready,83) HEAT(blocked,296) CanReceiv(blocked,834) CanSender(blocked,344) CanClock(blocked,352) TMC(blocked,19) MAIN(running,705) IDLE(ready,19)
Owned mutexes: HTTP(MAIN)
=== Platform ===
Last reset 00:05:12 ago, cause: power up
Last software reset at 2021-01-22 22:12, reason: User, GCodes spinning, available RAM 145212, slot 2
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x00400000 BFAR 0x00000000 SP 0x00000000 Task Linu Freestk 0 n/a
Error status: 0x00
Aux0 errors 0,0,0
Aux1 errors 0,0,0
MCU temperature: min 27.9, current 34.7, max 35.1
Supply voltage: min 24.0, current 24.2, max 24.3, under voltage events: 0, over voltage events: 0, power good: yes
12V rail voltage: min 12.2, current 12.2, max 12.3, under voltage events: 0
Driver 0: position 52000, standstill, reads 31010, writes 27 timeouts 0, SG min/max 0/1023
Driver 1: position -50400, standstill, reads 31011, writes 27 timeouts 0, SG min/max 0/1023
Driver 2: position 12453, standstill, reads 31006, writes 32 timeouts 0, SG min/max 0/1023
Driver 3: position 0, standstill, reads 31006, writes 32 timeouts 0, SG min/max 0/1023
Driver 4: position 0, standstill, reads 31006, writes 32 timeouts 0, SG min/max 0/1023
Driver 5: position 0, standstill, reads 31006, writes 32 timeouts 0, SG min/max 0/1023
Date/time: 2021-01-22 22:17:38
Slowest loop: 164.33ms; fastest: 0.04ms
=== Storage ===
Free file entries: 10
SD card 0 not detected, interface speed: 37.5MBytes/sec
SD card longest read time 0.0ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 125, maxWait 107133ms, bed compensation in use: mesh, comp offset 0.000
=== MainDDARing ===
Scheduled moves 671, completed moves 671, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 2], CDDA state -1
=== AuxDDARing ===
Scheduled moves 0, completed moves 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== Heat ===
Bed heaters = 0 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1, chamberHeaters = -1 -1 -1 -1
Heater 0 is on, I-accum = 0.0
Heater 1 is on, I-accum = 0.0
=== GCodes ===
Segments left: 0
Movement lock held by null
HTTP* is doing "M122" in state(s) 0
Telnet is idle in state(s) 0
File* is idle in state(s) 0
USB is idle in state(s) 0
Aux is idle in state(s) 0
Trigger* is idle in state(s) 0
Queue* is idle in state(s) 0
LCD is idle in state(s) 0
SBC is idle in state(s) 0
Daemon is idle in state(s) 0
Aux2 is idle in state(s) 0
Autopause is idle in state(s) 0
Code queue is empty.
=== CAN ===
Messages queued 1655, send timeouts 0, received 3629, lost 0, longest wait 2ms for reply type 6049, free buffers 48
=== SBC interface ===
State: 4, failed transfers: 0
Last transfer: 1ms ago
RX/TX seq numbers: 10758/10758
SPI underruns 0, overruns 0
Number of disconnects: 0, IAP RAM available 0x2c8a8
Buffer RX/TX: 0/0-0
=== Duet Control Server ===
Duet Control Server v3.2.0
Code buffer space: 4096
Configured SPI speed: 8000000 Hz
Full transfers per second: 9.49
Maximum length of RX/TX data transfers: 2816/1480

M122 B121
Diagnostics for board 121:
Duet TOOL1LC firmware version 3.2 (2021-01-05)
Bootloader ID: not available
Never used RAM 4032, free system stack 50 words
HEAT 90 CanAsync 89 CanRecv 83 TMC 54 MAIN 218 AIN 64
Last reset 00:06:01 ago, cause: power up
Last software reset data not available
Driver 0: position 60224, 415.0 steps/mm, standstill, SG min/max 0/304, read errors 0, write errors 0, ifcnt 14, reads 49787, writes 14, timeouts 0, DMA errors 0
Moves scheduled 374, completed 374, in progress 0, hiccups 0
No step interrupt scheduled
VIN: 24.1V
MCU temperature: min 48.8C, current 52.6C, max 54.6C
Ticks since heat task active 32, ADC conversions started 360855, completed 360854, timed out 0
Last sensors broadcast 0x00000002 found 1 35 ticks ago, loop time 0
CAN messages queued 4238, send timeouts 0, received 3670, lost 0, free buffers 36

@Phaedrux said in Firmware downgrade:

Would you be able to capture a M122 for the mainboard and tool board after experiencing the print problems?

M122
=== Diagnostics ===
RepRapFirmware for Duet 3 MB6HC version 3.2 running on Duet 3 MB6HC v1.01 or later (SBC mode)
Board ID: 08DJM-956BA-NA3TJ-6J9D8-3SN6T-1AAYV
Used output buffers: 1 of 40 (10 max)
=== RTOS ===
Static ram: 149788
Dynamic ram: 63740 of which 92 recycled
Never used RAM 145212, free system stack 128 words
Tasks: Linux(ready,77) HEAT(blocked,296) CanReceiv(blocked,834) CanSender(blocked,344) CanClock(blocked,352) TMC(blocked,19) MAIN(running,671) IDLE(ready,19)
Owned mutexes: HTTP(MAIN)
=== Platform ===
Last reset 00:05:17 ago, cause: power up
Last software reset at 2021-01-22 21:45, reason: User, GCodes spinning, available RAM 147812, slot 1
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x00400000 BFAR 0x00000000 SP 0x00000000 Task Linu Freestk 0 n/a
Error status: 0x00
Aux0 errors 0,0,0
Aux1 errors 0,0,0
MCU temperature: min 29.1, current 34.4, max 36.4
Supply voltage: min 24.0, current 24.2, max 24.3, under voltage events: 0, over voltage events: 0, power good: yes
12V rail voltage: min 12.2, current 12.2, max 12.3, under voltage events: 0
Driver 0: position 52000, standstill, reads 532, writes 27 timeouts 0, SG min/max 0/1023
Driver 1: position -50400, standstill, reads 531, writes 28 timeouts 0, SG min/max 0/1023
Driver 2: position 12253, standstill, reads 526, writes 33 timeouts 0, SG min/max 0/941
Driver 3: position 0, standstill, reads 526, writes 33 timeouts 0, SG min/max 0/1023
Driver 4: position 0, standstill, reads 526, writes 33 timeouts 0, SG min/max 0/1023
Driver 5: position 0, standstill, reads 526, writes 33 timeouts 0, SG min/max 0/703
Date/time: 2021-01-22 22:01:36
Slowest loop: 165.12ms; fastest: 0.04ms
=== Storage ===
Free file entries: 10
SD card 0 not detected, interface speed: 37.5MBytes/sec
SD card longest read time 0.0ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 125, maxWait 105941ms, bed compensation in use: mesh, comp offset 0.000
=== MainDDARing ===
Scheduled moves 420, completed moves 420, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 5], CDDA state -1
=== AuxDDARing ===
Scheduled moves 0, completed moves 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== Heat ===
Bed heaters = 0 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1, chamberHeaters = -1 -1 -1 -1
Heater 0 is on, I-accum = 0.1
Heater 1 is on, I-accum = 0.0
=== GCodes ===
Segments left: 0
Movement lock held by null
HTTP* is doing "M122" in state(s) 0
Telnet is idle in state(s) 0
File* is idle in state(s) 0
USB is idle in state(s) 0
Aux is idle in state(s) 0
Trigger* is idle in state(s) 0
Queue* is idle in state(s) 0
LCD is idle in state(s) 0
SBC is idle in state(s) 0
Daemon is idle in state(s) 0
Aux2 is idle in state(s) 0
Autopause is idle in state(s) 0
Code queue is empty.
=== CAN ===
Messages queued 1449, send timeouts 0, received 3694, lost 0, longest wait 2ms for reply type 6049, free buffers 48
=== SBC interface ===
State: 4, failed transfers: 0
Last transfer: 1ms ago
RX/TX seq numbers: 10985/10985
SPI underruns 0, overruns 0
Number of disconnects: 0, IAP RAM available 0x2c8a8
Buffer RX/TX: 0/0-0
=== Duet Control Server ===
Duet Control Server v3.2.0
Code buffer space: 4096
Configured SPI speed: 8000000 Hz
Full transfers per second: 13.87
Maximum length of RX/TX data transfers: 2792/1512

M122 B121
Diagnostics for board 121:
Duet TOOL1LC firmware version 3.2 (2021-01-05)
Bootloader ID: not available
Never used RAM 4032, free system stack 52 words
HEAT 90 CanAsync 89 CanRecv 83 TMC 54 MAIN 218 AIN 64
Last reset 00:06:26 ago, cause: power up
Last software reset data not available
Driver 0: position 1900, 415.0 steps/mm, standstill, SG min/max 0/304, read errors 0, write errors 0, ifcnt 15, reads 62126, writes 15, timeouts 0, DMA errors 0
Moves scheduled 145, completed 145, in progress 0, hiccups 0
No step interrupt scheduled
VIN: 24.1V
MCU temperature: min 40.9C, current 46.9C, max 48.4C
Ticks since heat task active 212, ADC conversions started 384990, completed 384989, timed out 0
Last sensors broadcast 0x00000002 found 1 215 ticks ago, loop time 0
CAN messages queued 4534, send timeouts 0, received 3665, lost 0, free buffers 36

Nothing was extruded at all. My priming script was off. V350_20mmTestCube_repaired.gcode

@Phaedrux said in Firmware downgrade:

Would you be able to capture a M122 for the mainboard and tool board after experiencing the print problems? And to share that gcode file.

Need some time. I'm reinstalling the software on RPi right now.

@Phaedrux said in Firmware downgrade:

Regardless, getting back to the tool boards. Did you confirm that they were also running 3.2?

Confirm.

@Phaedrux said in Firmware downgrade:

make sure you remove any M82 commands

Unfortunately, Cura puts M82 anyway:

And, before upgrading it worked without issues.

@Phaedrux said in Firmware downgrade:

So which of the gcode files you've uploaded is one that had the problem?

Those with relative extrusion.

@Phaedrux I know, but the folder is empty - I have cleared all jobs a couple of days ago just to be sure that nothing causes any interferention (like file was not overwritten properly). Attached you can find the same test cube sliced right now.V350_20mmTestCube_repaired.gcode