/etc/cups/cupsd.conf with LogLevel debug
debug log:
```
2024-05-10T21:37:29.451316+05:00 home systemd[1]: Started cups.path - CUPS Scheduler.
2024-05-10T21:37:29.451414+05:00 home systemd[1]: Listening on cups.socket - CUPS Scheduler.
2024-05-10T21:37:30.510367+05:00 home systemd[1]: Starting cups.service - CUPS Scheduler...
2024-05-10T21:37:30.514362+05:00 home systemd[1]: Started snap.cups.cups-browsed.service - Service for snap application cups.cups-browsed.
2024-05-10T21:37:30.515438+05:00 home systemd[1]: Started snap.cups.cupsd.service - Service for snap application cups.cupsd.
2024-05-10T21:37:30.569987+05:00 home systemd[1]: Started cups.service - CUPS Scheduler.
2024-05-10T21:37:30.804911+05:00 home cups.cups-browsed[1450]: + mkdir -p /var/snap/cups/1047/var/log
2024-05-10T21:37:30.805066+05:00 home cups.cupsd[1453]: + mkdir -p /var/snap/cups/1047/var/spool/tmp
2024-05-10T21:37:30.899651+05:00 home cups.cups-browsed[1450]: + mkdir -p /var/snap/cups/1047/var/cache
2024-05-10T21:37:30.899697+05:00 home cups.cupsd[1453]: + mkdir -p /var/snap/cups/1047/var/run/certs
2024-05-10T21:37:30.900751+05:00 home cups.cups-browsed[1450]: + mkdir -p /var/snap/cups/1047/var/run
2024-05-10T21:37:30.900871+05:00 home cups.cupsd[1453]: + mkdir -p /var/snap/cups/1047/var/log
2024-05-10T21:37:30.901845+05:00 home cups.cups-browsed[1450]: + mkdir -p /var/snap/cups/common/etc/cups
2024-05-10T21:37:30.901889+05:00 home cups.cupsd[1453]: + mkdir -p /var/snap/cups/1047/var/cache/fontconfig
2024-05-10T21:37:30.902908+05:00 home cups.cups-browsed[1450]: + CONF=/var/snap/cups/common/etc/cups/cups-browsed.conf
2024-05-10T21:37:30.902930+05:00 home cups.cups-browsed[1450]: + CLIENTCONF=/var/snap/cups/common/etc/cups/client.conf
2024-05-10T21:37:30.902945+05:00 home cups.cups-browsed[1450]: + DAEMON=cups-browsed
2024-05-10T21:37:30.902957+05:00 home cups.cups-browsed[1450]: + export LC_ALL=C.UTF-8
2024-05-10T21:37:30.902969+05:00 home cups.cups-browsed[1450]: + export LANG=C.UTF-8
2024-05-10T21:37:30.902980+05:00 home cups.cups-browsed[1450]: + TMPDIR=/var/snap/cups/1047/tmp
2024-05-10T21:37:30.902992+05:00 home cups.cups-browsed[1450]: + mkdir -p /var/snap/cups/1047/tmp
2024-05-10T21:37:30.903012+05:00 home cups.cupsd[1453]: + mkdir -p /var/snap/cups/common/etc/cups/ppd
2024-05-10T21:37:30.904170+05:00 home cups.cupsd[1453]: + mkdir -p /var/snap/cups/common/etc/cups/ssl
2024-05-10T21:37:30.905185+05:00 home cups.cupsd[1453]: + mkdir -p /var/snap/cups/common/run
2024-05-10T21:37:30.906250+05:00 home cups.cupsd[1453]: + mkdir -m 0755 -p /run/cups
2024-05-10T21:37:30.907276+05:00 home cups.cupsd[1453]: + export LC_ALL=C.UTF-8
2024-05-10T21:37:30.907298+05:00 home cups.cupsd[1453]: + export LANG=C.UTF-8
2024-05-10T21:37:30.907311+05:00 home cups.cupsd[1453]: + export TMPDIR=/var/snap/cups/1047/tmp
2024-05-10T21:37:30.907323+05:00 home cups.cupsd[1453]: + mkdir -p /var/snap/cups/1047/tmp
2024-05-10T21:37:30.911642+05:00 home cups.cups-browsed[1450]: + CUPSSTARTED=0
2024-05-10T21:37:30.911676+05:00 home cups.cupsd[1453]: + CUPSTMPDIR=/var/snap/cups/1047/var/spool/tmp
2024-05-10T21:37:30.911691+05:00 home cups.cupsd[1453]: + [ -d /var/snap/cups/1047/tmp ]
2024-05-10T21:37:30.911711+05:00 home cups.cupsd[1453]: + chown -R root.root /var/snap/cups/1047/tmp
2024-05-10T21:37:30.911894+05:00 home cups.cups-browsed[1575]: + seq 60
2024-05-10T21:37:30.920036+05:00 home cups.cups-browsed[1450]: + [ -r /var/snap/cups/1047/var/run/cupsd.pid ]
2024-05-10T21:37:30.920069+05:00 home cups.cups-browsed[1450]: + sleep 1
2024-05-10T21:37:30.930376+05:00 home cups.cupsd[1453]: + chmod -R u+rwX /var/snap/cups/1047/tmp
2024-05-10T21:37:30.933697+05:00 home cups.cupsd[1453]: + rm -rf /var/snap/cups/1047/tmp
2024-05-10T21:37:30.936872+05:00 home cups.cupsd[1453]: + [ -d /var/snap/cups/1047/tmp ]
2024-05-10T21:37:30.936892+05:00 home cups.cupsd[1453]: + [ -d /var/snap/cups/1047/var/spool/tmp ]
2024-05-10T21:37:30.936907+05:00 home cups.cupsd[1453]: + chown -R root.root /var/snap/cups/1047/var/spool/tmp
2024-05-10T21:37:30.938181+05:00 home cups.cupsd[1453]: + chmod -R u+rwX /var/snap/cups/1047/var/spool/tmp
2024-05-10T21:37:30.939052+05:00 home cups.cupsd[1453]: + rm -rf /var/snap/cups/1047/var/spool/tmp
2024-05-10T21:37:30.939940+05:00 home cups.cupsd[1453]: + [ -d /var/snap/cups/1047/var/spool/tmp ]
2024-05-10T21:37:30.939960+05:00 home cups.cupsd[1453]: + mkdir -p /var/snap/cups/1047/tmp
2024-05-10T21:37:30.941021+05:00 home cups.cupsd[1453]: + chown -R root.root /var/snap/cups/1047/tmp
2024-05-10T21:37:30.942216+05:00 home cups.cupsd[1453]: + chmod -R 1777 /var/snap/cups/1047/tmp
2024-05-10T21:37:30.943041+05:00 home cups.cupsd[1453]: + mkdir -p /var/snap/cups/1047/var/spool/tmp
2024-05-10T21:37:30.944072+05:00 home cups.cupsd[1453]: + chown -R root.snap_daemon /var/snap/cups/1047/var/spool/tmp
2024-05-10T21:37:30.945275+05:00 home cups.cupsd[1453]: + chmod -R 1770 /var/snap/cups/1047/var/spool/tmp
2024-05-10T21:37:30.946109+05:00 home cups.cupsd[1453]: + CUPSUSER=snap_daemon
2024-05-10T21:37:30.946129+05:00 home cups.cupsd[1453]: + ALTCUPSUSER=root
2024-05-10T21:37:30.946142+05:00 home cups.cupsd[1453]: + CUPSGROUP=snap_daemon
2024-05-10T21:37:30.946155+05:00 home cups.cupsd[1453]: + ALTCUPSGROUP=root
2024-05-10T21:37:30.946175+05:00 home cups.cupsd[1453]: + CUPSSYSTEMGROUP=lpadmin
2024-05-10T21:37:30.946188+05:00 home cups.cupsd[1453]: + ALTCUPSSYSTEMGROUP=adm
2024-05-10T21:37:30.946200+05:00 home cups.cupsd[1453]: + TESTFILE=/var/snap/cups/1047/tmp/testfile
2024-05-10T21:37:30.946211+05:00 home cups.cupsd[1453]: + touch /var/snap/cups/1047/tmp/testfile
2024-05-10T21:37:30.950626+05:00 home cups.cupsd[1453]: + chown snap_daemon /var/snap/cups/1047/tmp/testfile
2024-05-10T21:37:30.951584+05:00 home cups.cupsd[1453]: + chgrp snap_daemon /var/snap/cups/1047/tmp/testfile
2024-05-10T21:37:30.954279+05:00 home cups.cupsd[1453]: + rm -f /var/snap/cups/1047/tmp/testfile
2024-05-10T21:37:30.955144+05:00 home cups.cupsd[1453]: + getent group lpadmin
2024-05-10T21:37:30.957150+05:00 home cups.cupsd[1453]: + [ ! -f /var/snap/cups/common/etc/cups/cups-files.conf ]
2024-05-10T21:37:30.957254+05:00 home cups.cupsd[1453]: + perl -p -i -e s:^(\s*\#)?\s*User\s+\S+\s*$:User snap_daemon\n:; -e s:^(\s*\#)?\s*Group\s+.*$:Group snap_daemon:; -e s:^(\s*\#)?\s*SystemGroup\s+.*$:SystemGroup lpadmin root:; -e s:^(\s*\#)?\s*AccessLog\s+.*$:AccessLog /var/snap/cups/1047/var/log/access_log:; -e s:^(\s*\#)?\s*CacheDir\s+.*$:CacheDir /var/snap/cups/1047/var/cache:; -e s:^(\s*\#)?\s*DataDir\s+.*$:DataDir /snap/cups/1047/share/cups:; -e s:^(\s*\#)?\s*DocumentRoot\s+.*$:DocumentRoot /snap/cups/1047/share/cups/doc:; -e s:^(\s*\#)?\s*ErrorLog\s+.*$:ErrorLog /var/snap/cups/1047/var/log/error_log:; -e s:^(\s*\#)?\s*FontPath\s+.*$:\#FontPath (NOT SUPPORTED ANY MORE):; -e s:^(\s*\#)?\s*PageLog\s+.*$:PageLog /var/snap/cups/1047/var/log/page_log:; -e s:^(\s*\#)?\s*Printcap\s+.*$:Printcap /var/snap/cups/common/etc/printcap:; -e s:^(\s*\#)?\s*RequestRoot\s+.*$:RequestRoot /var/snap/cups/1047/var/spool:; -e s:^(\s*\#)?\s*ServerBin\s+.*$:ServerBin /snap/cups/1047/lib/cups:; -e s:^(\s*\#)?\s*ServerRoot\s+.*$:ServerRoot /var/snap/cups/common/etc/cups:; -e s:^(\s*\#)?\s*StateDir\s+.*$:StateDir /var/snap/cups/1047/var/run:; -e s:^(\s*\#)?\s*TempDir\s+.*$:TempDir /var/snap/cups/1047/var/spool/tmp:; /var/snap/cups/common/etc/cups/cups-files.conf
2024-05-10T21:37:31.065562+05:00 home cups.cupsd[1453]: + PROXY_MODE=NO
2024-05-10T21:37:31.065617+05:00 home cups.cupsd[1453]: + SYSTEM_CUPS_SERVER=
2024-05-10T21:37:31.065630+05:00 home cups.cupsd[1453]: + rm -f /var/snap/cups/1047/var/run/proxy-mode
2024-05-10T21:37:31.066568+05:00 home cups.cupsd[1453]: + [ ! -f /var/snap/cups/common/no-proxy ]
2024-05-10T21:37:31.066597+05:00 home cups.cupsd[1453]: + [ -r /etc/cups/cupsd.conf ]
2024-05-10T21:37:31.066611+05:00 home cups.cupsd[1453]: + touch /var/snap/cups/1047/var/run/proxy-mode
2024-05-10T21:37:31.067493+05:00 home cups.cupsd[1453]: + PROXY_MODE=YES
2024-05-10T21:37:31.067512+05:00 home cups.cupsd[1453]: + SYSTEM_CUPS_SERVER=localhost:631
2024-05-10T21:37:31.067780+05:00 home cups.cupsd[1597]: + grep -E ^[ \t]*Listen[ \t]+/ /etc/cups/cupsd.conf
2024-05-10T21:37:31.090414+05:00 home cups.cupsd[1453]: + LINE=Listen /run/cups/cups.sock
2024-05-10T21:37:31.090788+05:00 home cups.cupsd[1599]: + echo Listen /run/cups/cups.sock
2024-05-10T21:37:31.091528+05:00 home cups.cupsd[1600]: + head -1
2024-05-10T21:37:31.091657+05:00 home cups.cupsd[1601]: + perl -p -e s:^\s*Listen\s+(\S+)\s*$:\1:
2024-05-10T21:37:31.093909+05:00 home cups.cupsd[1453]: + SYSTEM_CUPS_SERVER=/run/cups/cups.sock
2024-05-10T21:37:31.093929+05:00 home cups.cupsd[1453]: + PORT=631
2024-05-10T21:37:31.093942+05:00 home cups.cupsd[1453]: + ALTPORT=10631
2024-05-10T21:37:31.093962+05:00 home cups.cupsd[1453]: + DOMAINSOCKET=/run/cups/cups.sock
2024-05-10T21:37:31.094010+05:00 home cups.cupsd[1453]: + [ ! -d /run/cups ]
2024-05-10T21:37:31.094040+05:00 home cups.cupsd[1453]: + ALTDOMAINSOCKET=/var/snap/cups/common/run/cups.sock
2024-05-10T21:37:31.094053+05:00 home cups.cupsd[1453]: + [ YES = YES ]
2024-05-10T21:37:31.094064+05:00 home cups.cupsd[1453]: + PORT=
2024-05-10T21:37:31.094075+05:00 home cups.cupsd[1453]: + DOMAINSOCKET=/var/snap/cups/common/run/cups.sock
2024-05-10T21:37:31.094109+05:00 home cups.cupsd[1453]: + [ ! -f /var/snap/cups/common/etc/cups/cupsd.conf ]
2024-05-10T21:37:31.094121+05:00 home cups.cupsd[1453]: + [ YES = YES ]
2024-05-10T21:37:31.094822+05:00 home cups.cupsd[1603]: + cat /var/snap/cups/common/etc/cups/cupsd.conf
2024-05-10T21:37:31.094982+05:00 home cups.cupsd[1604]: + grep -v Listen
2024-05-10T21:37:31.095143+05:00 home cups.cupsd[1605]: + grep -v Port
2024-05-10T21:37:31.097064+05:00 home cups.cupsd[1453]: + mv /var/snap/cups/common/etc/cups/cupsd.conf.new /var/snap/cups/common/etc/cups/cupsd.conf
2024-05-10T21:37:31.104482+05:00 home cups.cupsd[1453]: + LISTENLINES=
2024-05-10T21:37:31.104513+05:00 home cups.cupsd[1453]: + [ /var/snap/cups/common/run/cups.sock = /var/snap/cups/common/run/cups.sock ]
2024-05-10T21:37:31.104527+05:00 home cups.cupsd[1453]: + LISTENLINES=Listen /var/snap/cups/common/run/cups.sock
2024-05-10T21:37:31.104886+05:00 home cups.cupsd[1608]: + cat /var/snap/cups/common/etc/cups/cupsd.conf
2024-05-10T21:37:31.105013+05:00 home cups.cupsd[1609]: + grep -v Listen
2024-05-10T21:37:31.106119+05:00 home cups.cupsd[1453]: + echo Listen /var/snap/cups/common/run/cups.sock
2024-05-10T21:37:31.106147+05:00 home cups.cupsd[1453]: + cat /var/snap/cups/common/etc/cups/cupsd.conf.new
2024-05-10T21:37:31.107033+05:00 home cups.cupsd[1453]: + rm -f /var/snap/cups/common/etc/cups/cupsd.conf.new
2024-05-10T21:37:31.107908+05:00 home cups.cupsd[1453]: + touch /var/snap/cups/common/etc/cups/client.conf
2024-05-10T21:37:31.109159+05:00 home cups.cupsd[1614]: + cat /var/snap/cups/common/etc/cups/client.conf
2024-05-10T21:37:31.109281+05:00 home cups.cupsd[1615]: + grep -v ServerName
2024-05-10T21:37:31.110312+05:00 home cups.cupsd[1613]: + true
2024-05-10T21:37:31.110339+05:00 home cups.cupsd[1453]: + echo ServerName /var/snap/cups/common/run/cups.sock
2024-05-10T21:37:31.110428+05:00 home cups.cupsd[1453]: + cat /var/snap/cups/common/etc/cups/client.conf.new
2024-05-10T21:37:31.111278+05:00 home cups.cupsd[1453]: + rm -f /var/snap/cups/common/etc/cups/client.conf.new
2024-05-10T21:37:31.112167+05:00 home cups.cupsd[1453]: + [ ! -f /var/snap/cups/common/etc/cups/snmp.conf ]
2024-05-10T21:37:31.113156+05:00 home cups.cupsd[1618]: + yes n
2024-05-10T21:37:31.113291+05:00 home cups.cupsd[1619]: + cp -ri /snap/cups/1047/etc/cups/ppd /var/snap/cups/common/etc/cups/
2024-05-10T21:37:31.119258+05:00 home cups.cupsd[1620]: + yes n
2024-05-10T21:37:31.119386+05:00 home cups.cupsd[1621]: + cp -ri /snap/cups/1047/etc/cups/ssl /var/snap/cups/common/etc/cups/
2024-05-10T21:37:31.120470+05:00 home cups.cupsd[1453]: + SCHEDULER=cupsd
2024-05-10T21:37:31.120503+05:00 home cups.cupsd[1453]: + CUPS_PID=1622
2024-05-10T21:37:31.120579+05:00 home cups.cupsd[1453]: + echo 1622
2024-05-10T21:37:31.120724+05:00 home cups.cupsd[1622]: +
2024-05-10T21:37:31.120749+05:00 home cups.cupsd[1453]: +
2024-05-10T21:37:31.120776+05:00 home cups.cupsd[1622]: exec
2024-05-10T21:37:31.120795+05:00 home cups.cupsd[1453]: [
2024-05-10T21:37:31.120812+05:00 home cups.cupsd[1622]:  cupsd
2024-05-10T21:37:31.120828+05:00 home cups.cupsd[1453]:  YES
2024-05-10T21:37:31.120844+05:00 home cups.cupsd[1622]:  -f -s
2024-05-10T21:37:31.120860+05:00 home cups.cupsd[1453]:  =
2024-05-10T21:37:31.120903+05:00 home cups.cupsd[1622]:  /var/snap/cups/common/etc/cups/cups-files.conf
2024-05-10T21:37:31.120921+05:00 home cups.cupsd[1453]:  YES
2024-05-10T21:37:31.120938+05:00 home cups.cupsd[1622]:  -c
2024-05-10T21:37:31.120951+05:00 home cups.cupsd[1453]:  ]
2024-05-10T21:37:31.120968+05:00 home cups.cupsd[1622]:  /var/snap/cups/common/etc/cups/cupsd.conf
2024-05-10T21:37:31.120990+05:00 home cups.cupsd[1453]: + PROXY_DAEMON=cups-proxyd
2024-05-10T21:37:31.121003+05:00 home cups.cupsd[1453]: + PROXYD_PID=1623
2024-05-10T21:37:31.121018+05:00 home cups.cupsd[1453]: + echo 1623
2024-05-10T21:37:31.121033+05:00 home cups.cupsd[1453]: + wait 1622
2024-05-10T21:37:31.121187+05:00 home cups.cupsd[1623]: + exec cups-proxyd /var/snap/cups/common/run/cups.sock /run/cups/cups.sock -l --logdir /var/snap/cups/1047/var/log
2024-05-10T21:37:31.501137+05:00 home kernel: audit: type=1326 audit(1715359051.499:188): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=snap.cups.cupsd pid=1622 comm="cupsd" exe="/snap/cups/1047/sbin/cupsd" sig=0 arch=c000003e syscall=93 compat=0 ip=0x797177f86a9b code=0x50000
2024-05-10T21:37:31.929096+05:00 home cups.cups-browsed[1450]: + [ -r /var/snap/cups/1047/var/run/cupsd.pid ]
2024-05-10T21:37:31.929251+05:00 home cups.cups-browsed[1629]: + cat /var/snap/cups/1047/var/run/cupsd.pid
2024-05-10T21:37:31.930140+05:00 home cups.cups-browsed[1450]: + PID=1622
2024-05-10T21:37:31.930162+05:00 home cups.cups-browsed[1450]: + [ -n 1622 ]
2024-05-10T21:37:31.930192+05:00 home cups.cups-browsed[1450]: + kill -0 1622
2024-05-10T21:37:31.930215+05:00 home cups.cups-browsed[1450]: + CUPSSTARTED=1
2024-05-10T21:37:31.930229+05:00 home cups.cups-browsed[1450]: + break
2024-05-10T21:37:31.930241+05:00 home cups.cups-browsed[1450]: + [ 1 = 0 ]
2024-05-10T21:37:31.930254+05:00 home cups.cups-browsed[1450]: + PID=
2024-05-10T21:37:31.930274+05:00 home cups.cups-browsed[1450]: + [ ! -e /var/snap/cups/1047/var/run/proxy-mode ]
2024-05-10T21:37:31.930293+05:00 home cups.cups-browsed[1450]: + PID=1631
2024-05-10T21:37:31.930345+05:00 home cups.cups-browsed[1450]: + echo 1631
2024-05-10T21:37:31.930496+05:00 home cups.cups-browsed[1631]: +
2024-05-10T21:37:31.930515+05:00 home cups.cups-browsed[1450]: + wait 1631
2024-05-10T21:37:31.930537+05:00 home cups.cups-browsed[1631]: true
2024-05-10T21:37:31.930551+05:00 home cups.cups-browsed[1631]: + sleep 3600
2024-05-10T21:37:32.523168+05:00 home kernel: audit: type=1326 audit(1715359052.521:189): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=snap.cups.cupsd pid=1623 comm="cups-proxyd" exe="/snap/cups/1047/sbin/cups-proxyd" sig=0 arch=c000003e syscall=314 compat=0 ip=0x7755bbcf488d code=0x50000
2024-05-10T21:37:33.544165+05:00 home kernel: cups-proxyd[1623]: segfault at 18 ip 00005ce3d8591d75 sp 00007ffd26e33590 error 4 in cups-proxyd[5ce3d858e000+7000] likely on CPU 5 (core 5, socket 0)
2024-05-10T21:37:36.264592+05:00 home systemd[1]: Started cups-browsed.service - Make remote CUPS printers available locally.
```