I've got a raspberry pi 5 with the latest bookworm os. I cannot get the system to recognize my digi2 pro. I have read everything I could find in the knowledgebase, the forums, and followed the instructions to the letter.
I've booted into hifiberry os (changed the "dac" to "digi-pro" in config.txt) and the digi-pro is recognized, so I know it's not the pi 5 or the digi-pro.
Please note that I've used both dtoverlay=hifiberry-digi-pro and dtoverlay=hifiberry-digi2-pro.
Here's my config.txt:
# For more options and information see
# Some settings may impact device functionality. See link above for details
# Uncomment some or all of these to enable the optional hardware interfaces
#dtparam=i2c_arm=on
#dtparam=i2s=on
#dtparam=spi=on
# Enable audio (loads snd_bcm2835)
# dtparam=audio=on
# Additional overlays and parameters are documented
# /boot/firmware/overlays/README
# Automatically load overlays for detected cameras
camera_auto_detect=1
# Automatically load overlays for detected DSI displays
display_auto_detect=1
# Automatically load initramfs files, if found
auto_initramfs=1
# Enable DRM VC4 V3D driver
# dtoverlay=vc4-kms-v3d
max_framebuffers=2
# Don't have the firmware create an initial video= setting in cmdline.txt.
# Use the kernel's default instead.
disable_fw_kms_setup=1
# Run in 64-bit mode
arm_64bit=1
# Disable compensation for displays with overscan
disable_overscan=1
# Run as fast as firmware / board allows
arm_boost=1
[cm4]
# Enable host mode on the 2711 built-in XHCI USB controller.
# This line should be removed if the legacy DWC2 controller is required
# (e.g. for USB device mode) or if USB support is not required.
otg_mode=1
[all]
force_eeprom_read=0
dtoverlay=vc4-fkms-v3d,audio=off
dtoverlay=vc4-kms-v3d,noaudio
dtoverlay=hifiberry-digi2-pro