lightdm crashes on pam_sm_authenticate

Bug #1746954 reported by Tony Beaumont
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
lightdm (Ubuntu)
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Bug Description

On logging in after reboot, my username and password are not recognized for several attempts (two or three) and after I log in I get the following report

lightdm crashed with SIGSEGV in pam_sm_authenticate

Segfault happened at: 0x7f5184e88d30 <pam_sm_authenticate+3392>: mov 0x8(%rbx),%r15
PC(0x7f5184e88d30) ok
source "0x8(%rbx)" (0x00000008) not located in a known VMA region (needed readable region)!
destination "%r15" ok

SegvReason: reading NULL VMA

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