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[Launchpad Bug Tracker <2115574@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package libpciaccess - 0.17-3ubuntu0.24.04.2

---------------
libpciaccess (0.17-3ubuntu0.24.04.2) noble; urgency=medium

  * Revert to 0.17-3build1 since the previous update appears to cause
    inability to log in to the desktop on some systems (LP: #2115574)

 -- Jeremy Bícha <jbicha@xxxxxxxxxx>  Mon, 30 Jun 2025 11:55:17 -0400

** Changed in: libpciaccess (Ubuntu Noble)
       Status: Fix Committed => Fix Released

** Changed in: libpciaccess (Ubuntu Plucky)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/2115574

Title:
  Upgrade of libpciaccess0 to 0.17-3ubuntu0.25.04.1 causes black screen
  on boot with AMD Radeon GPU

Status in libpciaccess package in Ubuntu:
  Invalid
Status in libpciaccess source package in Noble:
  Fix Released
Status in libpciaccess source package in Plucky:
  Fix Released
Status in libpciaccess source package in Questing:
  Invalid

Bug description:
  [ Impact ]

  This is fixing a regression introduced by LP: #2111684.

  After the upgrade, the system fails to boot into the graphical user
  interface.

  This was reported here, and LP: #2115605 and LP: #2115598, and also in
  forums like https://forums.linuxmint.com/viewtopic.php?t=448655.

  One report says that the login prompt (gdm) is there, and it's just
  the monitor that is off. Blindly typing the credentials seems to work
  and get into the GUI, provided the credentials are correct.

  In all the reported cases, reverting to the previous version of this
  package fixed the problem.

  
  [ Test Plan ]

  Update to the proposed package.
  Reboot, and confirm that the GUI login prompt shows up as normal, and allows login to the system.

  
  [ Where problems could occur ]
  This update is an exact revert of LP: #2111684. It's not expected for the revert to introduce new problems, since it doesn't involve any postinst actions or something else that would not be idempotent. One obvious regression, though, is that bug LP: #2111684 will be reintroduced to those systems that were affected by it.

  
  [ Original Description ]

  1) The release of Ubuntu you are using:
  Kubuntu 25.04 "Plucky Puffin"

  2) The version of the package you are using:
  The issue is caused by upgrading libpciaccess0.
      Working version: 0.17-3build1
      Problematic version: 0.17-3ubuntu0.25.04.1

  3) What you expected to happen:
  After a standard system upgrade via sudo apt upgrade and a reboot, I expected the system to boot normally into the Kubuntu Plasma desktop environment, just as it did before the upgrade.

  4. What happened instead:
  After the upgrade, the system fails to boot into the graphical user interface. The boot process shows the Kubuntu logo, but immediately after, the screen turns black. My primary monitor shows a black screen, and my secondary monitor loses its signal entirely.

  Troubleshooting and Workaround:
      Booting into Recovery Mode works.
      Restoring a system snapshot (via Timeshift) to the state before the apt upgrade resolves the issue, and the system boots normally again.
      By isolating the packages, I have confirmed that the problem is specifically caused by the upgrade of the libpciaccess0 package.
      The issue is consistently reproducible by upgrading only this package.
      The current workaround is to prevent the package from being upgraded by using the command: sudo apt-mark hold libpciaccess0. With this package held back, all other system updates can be installed without causing the boot issue.

  This issue seems to be related to how the new version of libpciaccess0
  interacts with the AMD Radeon graphics driver during the system's
  startup sequence. My hardware includes an AMD Radeon GPU. My GPU is an
  AMD Radeon RX 7700 XT.

  ProblemType: Bug
  DistroRelease: Ubuntu 25.04
  Package: libpciaccess0 0.17-3build1
  ProcVersionSignature: Ubuntu 6.14.0-22.22-generic 6.14.5
  Uname: Linux 6.14.0-22-generic x86_64
  ApportVersion: 2.32.0-0ubuntu5.2
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  CasperMD5CheckResult: unknown
  CompositorRunning: None
  CurrentDesktop: KDE
  Date: Sun Jun 29 05:18:20 2025
  DistUpgraded: Fresh install
  DistroCodename: plucky
  DistroVariant: ubuntu
  DkmsStatus:
   virtualbox/7.0.20, 6.14.0-15-generic, x86_64: installed
   virtualbox/7.0.20, 6.14.0-22-generic, x86_64: installed
  GraphicsCard:
   Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:7d98]
   Advanced Micro Devices, Inc. [AMD/ATI] Navi 32 [Radeon RX 7700 XT / 7800 XT] [1002:747e] (rev ff) (prog-if 00 [VGA controller])
     Subsystem: ASUSTeK Computer Inc. Device [1043:0516]
  InstallationDate: Installed on 2025-05-08 (51 days ago)
  InstallationMedia: Kubuntu 25.04 "Plucky Puffin" - Release amd64 (20250417)
  MachineType: Micro-Star International Co., Ltd. MS-7D98
  ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-6.14.0-22-generic root=UUID=8ebad1b8-eda6-47da-acf8-78af15e5f55b ro rootflags=subvol=@ quiet splash vt.handoff=7
  SourcePackage: libpciaccess
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/30/2024
  dmi.bios.release: 5.27
  dmi.bios.vendor: American Megatrends International, LLC.
  dmi.bios.version: H.A0
  dmi.board.asset.tag: Default string
  dmi.board.name: B760 GAMING PLUS WIFI (MS-7D98)
  dmi.board.vendor: Micro-Star International Co., Ltd.
  dmi.board.version: 3.0
  dmi.chassis.asset.tag: Default string
  dmi.chassis.type: 3
  dmi.chassis.vendor: Micro-Star International Co., Ltd.
  dmi.chassis.version: 3.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInternational,LLC.:bvrH.A0:bd09/30/2024:br5.27:svnMicro-StarInternationalCo.,Ltd.:pnMS-7D98:pvr3.0:rvnMicro-StarInternationalCo.,Ltd.:rnB760GAMINGPLUSWIFI(MS-7D98):rvr3.0:cvnMicro-StarInternationalCo.,Ltd.:ct3:cvr3.0:skuDefaultstring:
  dmi.product.family: Default string
  dmi.product.name: MS-7D98
  dmi.product.sku: Default string
  dmi.product.version: 3.0
  dmi.sys.vendor: Micro-Star International Co., Ltd.
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.124-2
  version.libgl1-mesa-dri: libgl1-mesa-dri 25.0.3-1ubuntu2
  version.libgl1-mesa-glx: libgl1-mesa-glx N/A
  version.xserver-xorg-core: xserver-xorg-core 2:21.1.16-1ubuntu1.1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:22.0.0-1build1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20210115-1build1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.18-1

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