Hi, it’s me again.
Since things were a bit chaotic yesterday (my fault), I approached the whole thing a bit more methodically today and performed a “dry print” (printing a test file without filament) for each klipper commit:
#########################################
git bisect test for klipper v0.13
#########################################
Start with commit: cc919a5 (bisect good)
End with commit: 89ffbbe (bisect bad)
results
#########################################
commit cc919a5
#########################################
Tested by printing without filament Test-Körper.step (print time ~1h20m).
bad events in klippy.log: no
commit 89ffbbe
#########################################
Tested by printing without filament Test-Körper.step (print time ~1h20m).
bad events in klippy.log: yes
type: phase change
frequency: 22 times
steppers:
- x: no
- y: no
- z: yes
- z1: no
- z2: yes
- z3: no
occures during:
- homing: no
- QGL: yes
- bed mesh: yes
- printing: no
commit 7f4f696
#########################################
Tested by printing without filament Test-Körper.step (print time ~1h20m).
bad events in klippy.log: yes
type: phase change
frequency: 1 time
steppers:
- x: no
- y: no
- z: no
- z1: no
- z2: yes
- z3: no
occures during:
- homing: no
- QGL: no
- bed mesh: yes
- printing: no
precautionary marked as bisect bad
commit 42faa96
#########################################
Tested by printing without filament Test-Körper.step (print time ~1h20m).
bad events in klippy.log: no
commit c352617
#########################################
Tested by printing without filament Test-Körper.step (print time ~1h20m).
bad events in klippy.log: yes
type: phase change
frequency: 1 time
steppers:
- x: no
- y: no
- z: no
- z1: no
- z2: yes
- z3: no
occures during:
- homing: no
- QGL: yes
- bed mesh: no
- printing: no
precautionary marked as bisect bad
commit 5d1f773
#########################################
Tested by printing without filament Test-Körper.step (print time ~1h20m).
bad events in klippy.log: no
#########################################
final bisect result
#########################################
c352617c30ea71198b332233cea0e3de1d85c4a8 is the first bad commit
commit c352617c30ea71198b332233cea0e3de1d85c4a8
Author: Kevin O’Connor kevin@koconnor.net
Date: Tue Apr 22 10:52:43 2025 -0400
stm32: Use enable_pclock() in stm32h7 clock_setup()
Use the helper functions to enable the peripheral clock instead of
directly manipulating the clock enable bits.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
src/stm32/stm32h7.c | 9 +++±----
1 file changed, 4 insertions(+), 5 deletions(-)
I hope that helps 
klippy(bisect).zip (1.6 MB)