I have the same problem on Ubuntu 19.10, with HPLIP 3.19.11 using HP-Laserjet-CP-1025 pritner.
When printing test page, the colors are OK, but the text part of the test page is printed with color ink.
Turning the printer output to grayscale nothing printed and the job is stopped, and in job properties:
job-printer-state-message: Filter failed
job-state: 6
job-state-reasons: cups-filter-crashed
syslog:
Dec 9 10:16:48 apugepe2 hpcups[8632]: prnt/hpcups/HPCupsFilter.cpp 647: DEBUG: imageProcessorStartPage failed result = 2
Dec 9 10:16:48 apugepe2 kernel: [ 4401.556799] hpcups[8632]: segfault at 562ff1daa000 ip 00007f63057c39cd sp 00007fff9e9408c0 error 6 in libImageProcessor-x86_64.so[7f63057bc000+6e000]
Dec 9 10:16:48 apugepe2 kernel: [ 4401.556805] Code: 95 55 1a 8f 5e 90 2a 71 09 fd 73 9c fd 27 c2 64 56 cc aa 41 8d 54 3d 00 4c 01 f2 48 89 94 f3 38 01 00 00 41 8d 14 3b 4c 01 f2 <48> 89 94 f3 40 01 00 00 41 8d 14 3a 4c 01 f2 e9 30 aa 01 00 83 7d
I have the same problem on Ubuntu 19.10, with HPLIP 3.19.11 using HP-Laserjet-CP-1025 pritner.
When printing test page, the colors are OK, but the text part of the test page is printed with color ink. state-message: Filter failed
Turning the printer output to grayscale nothing printed and the job is stopped, and in job properties:
job-printer-
job-state: 6
job-state-reasons: cups-filter-crashed
syslog: HPCupsFilter. cpp 647: DEBUG: imageProcessorS tartPage failed result = 2 or-x86_ 64.so[7f63057bc 000+6e000]
Dec 9 10:16:48 apugepe2 hpcups[8632]: prnt/hpcups/
Dec 9 10:16:48 apugepe2 kernel: [ 4401.556799] hpcups[8632]: segfault at 562ff1daa000 ip 00007f63057c39cd sp 00007fff9e9408c0 error 6 in libImageProcess
Dec 9 10:16:48 apugepe2 kernel: [ 4401.556805] Code: 95 55 1a 8f 5e 90 2a 71 09 fd 73 9c fd 27 c2 64 56 cc aa 41 8d 54 3d 00 4c 01 f2 48 89 94 f3 38 01 00 00 41 8d 14 3b 4c 01 f2 <48> 89 94 f3 40 01 00 00 41 8d 14 3a 4c 01 f2 e9 30 aa 01 00 83 7d