*** This bug is a duplicate of bug 1861609 ***
    https://bugs.launchpad.net/bugs/1861609

Hi,

The latest version of glibc in the Plucky release pocket was released on
December 16th, it's not that new.

Furthermore, looking at the stack trace, you can see that the code
reenters glibc on __assert_fail, which indicates that the crash is due
to an assertion failure in the calling code, from Xorg. I'm assigning
that package to the bug.

The stack frames before the assert fail are related to DRI, so it might
be an issue in mesa or the kernel. Could you provide us with the full
system logs in the few seconds leading up to the the crash?

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https://bugs.launchpad.net/bugs/2098588

Title:
  After recent libc update my login screen goes "something bad happened"
  screen is shown

Status in xorg-server package in Ubuntu:
  New

Bug description:
  $lsb_release -rd
  Description:  Ubuntu Plucky Puffin (development branch)
  Release:      25.04

  
  $ apt-cache policy libc6
  libc6:
    Installed: 2.40-4ubuntu1
    Candidate: 2.40-4ubuntu1
    Version table:
   *** 2.40-4ubuntu1 500
          500 http://archive.ubuntu.com/ubuntu plucky/main amd64 Packages
          100 /var/lib/dpkg/status


  After recent libc update my login screen shows for couple seconds and
  then a white "something bad happened" screen is shown.

  I'm still able to use recovery, su - user, startx, but it fails with this 
backtrace:
  [   293.987] (EE) Backtrace:
  [   293.989] (EE) 0: /usr/lib/xorg/Xorg (OsLookupColor+0x14c) [0x5676b4eca6dc]
  [   293.990] (EE) 1: /lib/x86_64-linux-gnu/libc.so.6 (__sigaction+0x50) 
[0x7dd9c3645650]
  [   293.990] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (pthread_kill+0x11c) 
[0x7dd9c36a3f5c]
  [   293.991] (EE) 3: /lib/x86_64-linux-gnu/libc.so.6 (gsignal+0x1e) 
[0x7dd9c364559e]
  [   293.992] (EE) 4: /lib/x86_64-linux-gnu/libc.so.6 (abort+0xdf) 
[0x7dd9c3628902]
  [   293.993] (EE) unw_get_proc_name failed: no unwind info found [-10]
  [   293.993] (EE) 5: /lib/x86_64-linux-gnu/libc.so.6 (?+0x0) [0x7dd9c362881e]
  [   293.994] (EE) 6: /lib/x86_64-linux-gnu/libc.so.6 (__assert_fail+0x47) 
[0x7dd9c363bb87]
  [   293.994] (EE) 7: /usr/lib/xorg/Xorg (DRIMoveBuffersHelper+0xb13) 
[0x5676b4e6fe23]
  [   293.994] (EE) 8: /usr/lib/xorg/Xorg (DRI2Authenticate+0xce) 
[0x5676b4e728de]
  [   293.994] (EE) 9: /usr/lib/xorg/Xorg (DRI2GetParam+0x6d9) [0x5676b4e736f9]
  [   293.995] (EE) 10: /usr/lib/xorg/Xorg (SendErrorToClient+0x3fc) 
[0x5676b4d0204c]
  [   293.995] (EE) 11: /usr/lib/xorg/Xorg (InitFonts+0x3b3) [0x5676b4d07623]
  [   293.996] (EE) 12: /lib/x86_64-linux-gnu/libc.so.6 
(__libc_init_first+0x88) [0x7dd9c362a3b8]
  [   293.997] (EE) 13: /lib/x86_64-linux-gnu/libc.so.6 
(__libc_start_main+0x8b) [0x7dd9c362a47b]
  [   293.997] (EE) 14: /usr/lib/xorg/Xorg (_start+0x25) [0x5676b4ceb685]

  ProblemType: Bug
  DistroRelease: Ubuntu 25.04
  Package: libc6 2.40-4ubuntu1
  ProcVersionSignature: Ubuntu 6.12.0-15.15-generic 6.12.11
  Uname: Linux 6.12.0-15-generic x86_64
  ApportVersion: 2.31.0-0ubuntu5
  Architecture: amd64
  CasperMD5CheckResult: pass
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Feb 16 09:16:56 2025
  Dependencies:
   gcc-14-base 14.2.0-17ubuntu1
   libc6 2.40-4ubuntu1
   libgcc-s1 14.2.0-17ubuntu1
   libidn2-0 2.3.7-2build2
   libunistring5 1.3-1
  InstallationDate: Installed on 2021-09-14 (1250 days ago)
  InstallationMedia: Ubuntu 21.10 "Impish Indri" - Alpha amd64 (20210910)
  SourcePackage: glibc
  UpgradeStatus: No upgrade log present (probably fresh install)

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