I find that colord-sane fails on boot with the following output in journalctl
_pr 22 15:39:41 john-picasso systemd-coredump[822]: [🡕] Process 805 (colord-sane) of user 124 dumped core.
                                                Stack trace of thread 805:
                                                #0  0x00007f9db9650670 __pthread_mutex_lock@GLIBC_2.2.5 (libc.so.6 + 0x88670)
                                                #1  0x00007f9db90a9254 libusb_get_device_list (libusb-1.0.so.0 + 0x8254)
                                                #2  0x00007f9db803d014 n/a (libhpmud.so.0 + 0x16014)
                                                #3  0x00007f9db802d07c hpmud_probe_devices (libhpmud.so.0 + 0x607c)
                                                #4  0x00007f9db8b3667c n/a (libsane-hpaio.so.1 + 0x667c)
                                                #5  0x00007f9db8b36936 sane_hpaio_get_devices (libsane-hpaio.so.1 + 0x6936)
                                                #6  0x00007f9db97ab9c3 sane_dll_get_devices (libsane.so.1 + 0x79c3)
                                                #7  0x0000000000402829 n/a (colord-sane + 0x2829)
                                                #8  0x00007f9db94946c3 n/a (libgio-2.0.so.0 + 0xaf6c3)
                                                #9  0x00007f9db94952b3 n/a (libgio-2.0.so.0 + 0xb02b3)
                                                #10 0x00007f9db99c8a58 n/a (libcolord.so.2 + 0x15a58)
                                                #11 0x00007f9db94946c3 n/a (libgio-2.0.so.0 + 0xaf6c3)
                                                #12 0x00007f9db94952b3 n/a (libgio-2.0.so.0 + 0xb02b3)
                                                #13 0x00007f9db94f9604 n/a (libgio-2.0.so.0 + 0x114604)
                                                #14 0x00007f9db94946c3 n/a (libgio-2.0.so.0 + 0xaf6c3)
                                                #15 0x00007f9db94952b3 n/a (libgio-2.0.so.0 + 0xb02b3)
                                                #16 0x00007f9db94ed63a n/a (libgio-2.0.so.0 + 0x10863a)
                                                #17 0x00007f9db94946c3 n/a (libgio-2.0.so.0 + 0xaf6c3)
                                                #18 0x00007f9db94946f9 n/a (libgio-2.0.so.0 + 0xaf6f9)
                                                #19 0x00007f9db98136db n/a (libglib-2.0.so.0 + 0x556db)
                                                #20 0x00007f9db9816547 n/a (libglib-2.0.so.0 + 0x58547)
                                                #21 0x00007f9db9816d3f g_main_loop_run (libglib-2.0.so.0 + 0x58d3f)
                                                #22 0x0000000000402367 n/a (colord-sane + 0x2367)
                                                #23 0x00007f9db95edb37 __libc_start_call_main (libc.so.6 + 0x25b37)
                                                #24 0x00007f9db95edbf5 __libc_start_main@@GLIBC_2.34 (libc.so.6 + 0x25bf5)
                                                #25 0x00000000004023c1 n/a (colord-sane + 0x23c1)
                                                
                                                Stack trace of thread 818:
                                                #0  0x00007f9db96b888f __poll (libc.so.6 + 0xf088f)
                                                #1  0x00007f9db98164e7 n/a (libglib-2.0.so.0 + 0x584e7)
                                                #2  0x00007f9db9816d3f g_main_loop_run (libglib-2.0.so.0 + 0x58d3f)
                                                #3  0x00007f9db94fc286 n/a (libgio-2.0.so.0 + 0x117286)
                                                #4  0x00007f9db9841ded n/a (libglib-2.0.so.0 + 0x83ded)
                                                #5  0x00007f9db964d672 start_thread (libc.so.6 + 0x85672)
                                                #6  0x00007f9db96c5310 __clone (libc.so.6 + 0xfd310)
                                                
                                                Stack trace of thread 815:
                                                #0  0x00007f9db96b888f __poll (libc.so.6 + 0xf088f)
                                                #1  0x00007f9db98164e7 n/a (libglib-2.0.so.0 + 0x584e7)
                                                #2  0x00007f9db9816b1c g_main_context_iteration (libglib-2.0.so.0 + 0x58b1c)
                                                #3  0x00007f9db9816b61 n/a (libglib-2.0.so.0 + 0x58b61)
                                                #4  0x00007f9db9841ded n/a (libglib-2.0.so.0 + 0x83ded)
                                                #5  0x00007f9db964d672 start_thread (libc.so.6 + 0x85672)
                                                #6  0x00007f9db96c5310 __clone (libc.so.6 + 0xfd310)
                                                
                                                Stack trace of thread 816:
                                                #0  0x00007f9db96c3589 syscall (libc.so.6 + 0xfb589)
                                                #1  0x00007f9db986de9c g_cond_wait_until (libglib-2.0.so.0 + 0xafe9c)
                                                #2  0x00007f9db97e1fa1 n/a (libglib-2.0.so.0 + 0x23fa1)
                                                #3  0x00007f9db9842752 n/a (libglib-2.0.so.0 + 0x84752)
                                                #4  0x00007f9db9841ded n/a (libglib-2.0.so.0 + 0x83ded)
                                                #5  0x00007f9db964d672 start_thread (libc.so.6 + 0x85672)
                                                #6  0x00007f9db96c5310 __clone (libc.so.6 + 0xfd310)
                                                
                                                Stack trace of thread 814:
                                                #0  0x00007f9db96c3589 syscall (libc.so.6 + 0xfb589)
                                                #1  0x00007f9db986dd00 g_cond_wait (libglib-2.0.so.0 + 0xafd00)
                                                #2  0x00007f9db97e1fcb n/a (libglib-2.0.so.0 + 0x23fcb)
                                                #3  0x00007f9db98423f2 n/a (libglib-2.0.so.0 + 0x843f2)
                                                #4  0x00007f9db9841ded n/a (libglib-2.0.so.0 + 0x83ded)
                                                #5  0x00007f9db964d672 start_thread (libc.so.6 + 0x85672)
                                                #6  0x00007f9db96c5310 __clone (libc.so.6 + 0xfd310)
                                                ELF object binary architecture: AMD x86-64_
Can anyone help with this please.
Thanks,
JJ