this amount of data gets out to syslog just with single "su -"

login, telnet etc. works fine.

can PAM be disabled? (i don't feel any need of using pam, even prefer no 
pam)

Jul 30 17:26:44 chylonia su: in pam_setcred(): entering
Jul 30 17:26:44 chylonia su: in openpam_dispatch(): entering
Jul 30 17:26:44 chylonia su: in openpam_get_option(): entering: 'debug'
Jul 30 17:26:44 chylonia su: in openpam_get_option(): returning NULL
Jul 30 17:26:44 chylonia su: in openpam_dispatch(): calling pam_sm_setcred() in pam_rootok.so
Jul 30 17:26:44 chylonia su: in openpam_dispatch(): pam_rootok.so: pam_sm_setcred(): success
Jul 30 17:26:44 chylonia su: in openpam_get_option(): entering: 'debug'
Jul 30 17:26:44 chylonia su: in openpam_get_option(): returning NULL
Jul 30 17:26:44 chylonia su: in openpam_dispatch(): calling pam_sm_setcred() in pam_self.so
Jul 30 17:26:48 chylonia su: in pam_start(): entering
Jul 30 17:26:48 chylonia su: in pam_set_item(): entering: PAM_SERVICE
Jul 30 17:26:48 chylonia su: in pam_set_item(): returning PAM_SUCCESS
Jul 30 17:26:48 chylonia su: in pam_set_item(): entering: PAM_USER
Jul 30 17:26:48 chylonia su: in pam_set_item(): returning PAM_SUCCESS
Jul 30 17:26:48 chylonia su: in pam_set_item(): entering: PAM_CONV
Jul 30 17:26:48 chylonia su: in pam_set_item(): returning PAM_SUCCESS
Jul 30 17:26:48 chylonia su: in openpam_dynamic(): pam_rootok.so: pam_sm_acct_mgmt(): Undefined symbol "pam_sm_acct_mgmt"
Jul 30 17:26:48 chylonia su: in openpam_dynamic(): pam_rootok.so: pam_sm_open_session(): Undefined symbol "pam_sm_open_session"
Jul 30 17:26:48 chylonia su: in openpam_dynamic(): pam_ksu.so: pam_sm_acct_mgmt(): Undefined symbol "pam_sm_acct_mgmt"
Jul 30 17:26:48 chylonia su: in openpam_dynamic(): pam_ksu.so: pam_sm_open_session(): Undefined symbol "pam_sm_open_session"
Jul 30 17:26:48 chylonia su: in openpam_dynamic(): pam_ksu.so: pam_sm_close_session(): Undefined symbol "pam_sm_close_session"
Jul 30 17:26:48 chylonia su: in openpam_dynamic(): pam_ksu.so: pam_sm_chauthtok(): Undefined symbol "pam_sm_chauthtok"
Jul 30 17:26:48 chylonia su: in openpam_load_module(): using dynamic pam_ksu.so
Jul 30 17:26:48 chylonia su: in openpam_load_module(): adding pam_ksu.so to cache
Jul 30 17:26:48 chylonia su: in openpam_dynamic(): pam_group.so: pam_sm_acct_mgmt(): Undefined symbol "pam_sm_acct_mgmt"
Jul 30 17:26:48 chylonia su: in openpam_dynamic(): pam_group.so: pam_sm_open_session(): Undefined symbol "pam_sm_open_session"
Jul 30 17:26:48 chylonia su: in openpam_dynamic(): pam_group.so: pam_sm_close_session(): Undefined symbol "pam_sm_close_session"
Jul 30 17:26:48 chylonia su: in openpam_dynamic(): pam_unix.so: pam_sm_open_session(): Undefined symbol "pam_sm_open_session"
Jul 30 17:26:48 chylonia su: in openpam_dynamic(): pam_unix.so: pam_sm_close_session(): Undefined symbol "pam_sm_close_session"
Jul 30 17:26:48 chylonia su: in openpam_load_module(): using dynamic pam_unix.so
Jul 30 17:26:48 chylonia su: in openpam_load_module(): adding pam_unix.so to cache
Jul 30 17:26:48 chylonia su: in openpam_dynamic(): pam_login_access.so: pam_sm_authenticate(): Undefined symbol "pam_sm_authenticate"
Jul 30 17:26:48 chylonia su: in openpam_dynamic(): pam_login_access.so: pam_sm_setcred(): Undefined symbol "pam_sm_setcred"
Jul 30 17:26:48 chylonia su: in openpam_dynamic(): pam_login_access.so: pam_sm_open_session(): Undefined symbol "pam_sm_open_session"
Jul 30 17:26:48 chylonia su: in openpam_dynamic(): pam_login_access.so: pam_sm_close_session(): Undefined symbol "pam_sm_close_session"
Jul 30 17:26:48 chylonia su: in openpam_dynamic(): pam_login_access.so: pam_sm_chauthtok(): Undefined symbol "pam_sm_chauthtok"
Jul 30 17:26:48 chylonia su: in openpam_load_module(): using dynamic pam_login_access.so
Jul 30 17:26:48 chylonia su: in openpam_load_module(): adding pam_login_access.so to cache
Jul 30 17:26:48 chylonia su: in openpam_dynamic(): pam_krb5.so: pam_sm_open_session(): Undefined symbol "pam_sm_open_session"
Jul 30 17:26:48 chylonia su: in pam_start(): pam_start("su") succeeded
Jul 30 17:26:48 chylonia su: in openpam_dispatch(): calling pam_sm_authenticate() in pam_unix.so
Jul 30 17:26:48 chylonia su: in pam_vprompt(): entering
Jul 30 17:26:49 chylonia su: in openpam_ttyconv(): returning PAM_SUCCESS
Jul 30 17:26:49 chylonia su: in pam_vprompt(): returning PAM_SUCCESS
Jul 30 17:26:49 chylonia su: in pam_set_item(): entering: PAM_AUTHTOK
Jul 30 17:26:49 chylonia su: in pam_set_item(): returning PAM_SUCCESS
Jul 30 17:26:49 chylonia su: in pam_get_item(): entering: PAM_AUTHTOK
Jul 30 17:26:49 chylonia su: in pam_get_item(): returning PAM_SUCCESS
Jul 30 17:26:49 chylonia su: in pam_get_authtok(): returning PAM_SUCCESS
Jul 30 17:26:49 chylonia su: in pam_sm_authenticate(): Got password
Jul 30 17:26:49 chylonia su: in openpam_dispatch(): pam_unix.so: pam_sm_authenticate(): success