** Description changed:

  Hello,
  
- I am experiencing a 100% reproducible kernel regression that causes an
- instant system reboot when launching a specific Flatpak application. The
- system was previously experiencing random kernel panics, which were
- thought to have been resolved by purging a conflicting system-wide ROCm
- installation.
+ I am experiencing a 100% reproducible kernel regression (on my machine)
+ that causes an instant system reboot when launching a specific Flatpak
+ application. The system was previously experiencing random kernel
+ panics, which were thought to have been resolved by purging a
+ conflicting system-wide ROCm installation.
  
  What I expected to happen:
  
  The Flatpak application 'Supercell WX' should launch normally.
  
  What happened instead:
  
  The moment the application is launched, the system instantly reboots
  without displaying a visual kernel panic message on screen. No "Kernel
  Panic" or "BUG" messages are written to the journalctl logs from the
  crashed boot; the log simply cuts off.
  
  ---
  
  CRITICAL EVIDENCE OF REGRESSION:
  
  ---
  
  This crash ONLY occurs on the newer kernel. The application runs
  perfectly on the older kernel.
  
  *   BAD KERNEL (crashes): 6.14.0-24-generic
  
  *   GOOD KERNEL (works mostly perfectly): 6.11.0-29-generic
  
  g30@g30-Z690-AORUS-MASTER:~$ uname -r
  
  6.11.0-29-generic
  
  ---
  
  SYSTEM AND APPLICATION DETAILS:
  
  ---
  
  1. Release of Ubuntu:
  
  g30@g30-Z690-AORUS-MASTER:~$ lsb_release -rd
  
  No LSB modules are available.
  
  Description:    Ubuntu 24.04.2 LTS
  
  Release:        24.04
  
  2. Trigger Application Information (Flatpak):
  
  The crash is triggered by launching the Flatpak application
  net.supercellwx.app.
  
  Runtime: org.freedesktop.Platform/x86_64/23.08
  
  3. Graphics Hardware Information:
  
  g30@g30-Z690-AORUS-MASTER:~$ sudo lshw -C display
  
  [sudo] password for g30:
  
-   *-display
+   *-display
  
-        description: VGA compatible controller
+        description: VGA compatible controller
  
-        product: Navi 21 [Radeon RX 6800/6800 XT / 6900 XT]
+        product: Navi 21 [Radeon RX 6800/6800 XT / 6900 XT]
  
-        vendor: Advanced Micro Devices, Inc. [AMD/ATI]
+        vendor: Advanced Micro Devices, Inc. [AMD/ATI]
  
-        physical id: 0
+        physical id: 0
  
-        bus info: pci@0000:03:00.0
+        bus info: pci@0000:03:00.0
  
-        logical name: /dev/fb0
+        logical name: /dev/fb0
  
-        version: c1
+        version: c1
  
-        width: 64 bits
+        width: 64 bits
  
-        clock: 33MHz
+        clock: 33MHz
  
-        capabilities: pm pciexpress msi vga_controller bus_master
+        capabilities: pm pciexpress msi vga_controller bus_master
  cap_list rom fb
  
-        configuration: depth=32 driver=amdgpu latency=0
+        configuration: depth=32 driver=amdgpu latency=0
  resolution=2560,1440
  
-        resources: irq:238 memory:60000000-6fffffff
+        resources: irq:238 memory:60000000-6fffffff
  memory:70000000-701fffff ioport:4000(size=256) memory:43000000-430fffff
  memory:43100000-4311ffff
  
-   *-display
+   *-display
  
-        description: VGA compatible controller
+        description: VGA compatible controller
  
-        product: AlderLake-S GT1
+        product: AlderLake-S GT1
  
-        vendor: Intel Corporation
+        vendor: Intel Corporation
  
-        physical id: 2
+        physical id: 2
  
-        bus info: pci@0000:00:02.0
+        bus info: pci@0000:00:02.0
  
-        version: 0c
+        version: 0c
  
-        width: 64 bits
+        width: 64 bits
  
-        clock: 33MHz
+        clock: 33MHz
  
-        capabilities: pciexpress msi pm vga_controller bus_master
+        capabilities: pciexpress msi pm vga_controller bus_master
  cap_list rom
  
-        configuration: driver=i915 latency=0
+        configuration: driver=i915 latency=0
  
-        resources: irq:235 memory:41000000-41ffffff
+        resources: irq:235 memory:41000000-41ffffff
  memory:50000000-5fffffff ioport:5000(size=64) memory:c0000-dffff
  memory:44000000-4affffff
  
  ---
  
  LOGS:
  
  ---
  
  I have attached the required logs version.log and lspci-vnvn.log
  (generated while booted into the problematic kernel 6.14.0-24-generic).
  
  version.log file content: Ubuntu 6.14.0-24.24~24.04.3-generic 6.14.6
  
  Due to the nature of the instant reboot, a full crash log is not
  available in journalctl. The log from the previous boot journalctl -b
  -1) simply ends without any specific error messages related to the crash
  itself, showing only normal system activity up to the point of the
  reboot.
  
  Thank you for your time.

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https://bugs.launchpad.net/bugs/2117328

Title:
  Kernel Regression in 6.14.0-24-generic causes instant reboot with
  amdgpu when launching specific Flatpak app

Status in linux package in Ubuntu:
  New

Bug description:
  Hello,

  I am experiencing a 100% reproducible kernel regression (on my
  machine) that causes an instant system reboot when launching a
  specific Flatpak application. The system was previously experiencing
  random kernel panics, which were thought to have been resolved by
  purging a conflicting system-wide ROCm installation.

  What I expected to happen:

  The Flatpak application 'Supercell WX' should launch normally.

  What happened instead:

  The moment the application is launched, the system instantly reboots
  without displaying a visual kernel panic message on screen. No "Kernel
  Panic" or "BUG" messages are written to the journalctl logs from the
  crashed boot; the log simply cuts off.

  ---

  CRITICAL EVIDENCE OF REGRESSION:

  ---

  This crash ONLY occurs on the newer kernel. The application runs
  perfectly on the older kernel.

  *   BAD KERNEL (crashes): 6.14.0-24-generic

  *   GOOD KERNEL (works mostly perfectly): 6.11.0-29-generic

  g30@g30-Z690-AORUS-MASTER:~$ uname -r

  6.11.0-29-generic

  ---

  SYSTEM AND APPLICATION DETAILS:

  ---

  1. Release of Ubuntu:

  g30@g30-Z690-AORUS-MASTER:~$ lsb_release -rd

  No LSB modules are available.

  Description:    Ubuntu 24.04.2 LTS

  Release:        24.04

  2. Trigger Application Information (Flatpak):

  The crash is triggered by launching the Flatpak application
  net.supercellwx.app.

  Runtime: org.freedesktop.Platform/x86_64/23.08

  3. Graphics Hardware Information:

  g30@g30-Z690-AORUS-MASTER:~$ sudo lshw -C display

  [sudo] password for g30:

    *-display

         description: VGA compatible controller

         product: Navi 21 [Radeon RX 6800/6800 XT / 6900 XT]

         vendor: Advanced Micro Devices, Inc. [AMD/ATI]

         physical id: 0

         bus info: pci@0000:03:00.0

         logical name: /dev/fb0

         version: c1

         width: 64 bits

         clock: 33MHz

         capabilities: pm pciexpress msi vga_controller bus_master
  cap_list rom fb

         configuration: depth=32 driver=amdgpu latency=0
  resolution=2560,1440

         resources: irq:238 memory:60000000-6fffffff
  memory:70000000-701fffff ioport:4000(size=256)
  memory:43000000-430fffff memory:43100000-4311ffff

    *-display

         description: VGA compatible controller

         product: AlderLake-S GT1

         vendor: Intel Corporation

         physical id: 2

         bus info: pci@0000:00:02.0

         version: 0c

         width: 64 bits

         clock: 33MHz

         capabilities: pciexpress msi pm vga_controller bus_master
  cap_list rom

         configuration: driver=i915 latency=0

         resources: irq:235 memory:41000000-41ffffff
  memory:50000000-5fffffff ioport:5000(size=64) memory:c0000-dffff
  memory:44000000-4affffff

  ---

  LOGS:

  ---

  I have attached the required logs version.log and lspci-vnvn.log
  (generated while booted into the problematic kernel
  6.14.0-24-generic).

  version.log file content: Ubuntu 6.14.0-24.24~24.04.3-generic 6.14.6

  Due to the nature of the instant reboot, a full crash log is not
  available in journalctl. The log from the previous boot journalctl -b
  -1) simply ends without any specific error messages related to the
  crash itself, showing only normal system activity up to the point of
  the reboot.

  Thank you for your time.

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