** Description changed:

- My Xubuntu 26.04 graphical session suddenly crashed
+ My Xubuntu 26.04 graphical session suddenly crashed.
+ 
+ La trace montre exactement où le serveur graphique s'est effondré :
+ 
+ #4  0x00007c99c709dedd n/a (libgallium-26.0.3-1ubuntu1.so + 0x69dedd)
+ #5  0x00007c99c70538dc n/a (libgallium-26.0.3-1ubuntu1.so + 0x6538dc)
+ ...
+ Module iris_dri.so from deb mesa-26.0.3-1ubuntu1.amd64.
+ 
+ Les fils d'exécution (thread 5628, 5629, etc.) se sont bloqués sur des appels 
systèmes d'attente (__futex_abstimed_wait_common64), 
+ le pilote graphique s'est figé en attendant une ressource matérielle
+ avant que la fonction de sécurité d'Xorg (__syscall_cancel_arch) ne finisse 
par tuer le processus et générer le core dump
+ Juste avant le crash, les services d'arrière-plan d'XFCE (xfce4-notifyd, 
xdg-desktop-portal-gtk et xapp) ont tous renvoyé un code d'erreur (exit-code)
+ Celà fait penser à une fuite de mémoire vidéo (VRAM/RAM sharing) ou à un 
interblocage (deadlock) dans le pilote Intel Iris:
+ X connection to :0.0 broken.
+ 
  
  ProblemType: Bug
  DistroRelease: Ubuntu 26.04
  Package: xorg 1:7.7+26ubuntu1
  ProcVersionSignature: Ubuntu 7.0.0-22.22-generic 7.0.0
  Uname: Linux 7.0.0-22-generic x86_64
  ApportVersion: 2.34.0-0ubuntu2
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission non accordée: '/var/log/boot.log'
  CasperMD5CheckResult: pass
  CompositorRunning: None
  CurrentDesktop: XFCE
  Date: Thu Jun 18 23:20:02 2026
  DistUpgraded: Fresh install
  DistroCodename: resolute
  DistroVariant: ubuntu
  ExtraDebuggingInterest: No
  GraphicsCard:
-  Intel Corporation Kaby Lake-Y GT2 [HD Graphics 615] [8086:591e] (rev 02) 
(prog-if 00 [VGA controller])
-    Subsystem: Intel Corporation Kaby Lake-Y GT2 [HD Graphics 615] [8086:591e]
+  Intel Corporation Kaby Lake-Y GT2 [HD Graphics 615] [8086:591e] (rev 02) 
(prog-if 00 [VGA controller])
+    Subsystem: Intel Corporation Kaby Lake-Y GT2 [HD Graphics 615] [8086:591e]
  InstallationDate: Installed on 2023-06-04 (1110 days ago)
  InstallationMedia: Xubuntu 23.04 "Lunar Lobster" - Release amd64 (20230417)
  LightdmDisplayLog: (EE) event10 - Compx 2.4G Receiver Mouse: client bug: 
event processing lagging behind by 40ms, your system is too slow
  MachineType: CHUWI Innovation And Technology(ShenZhen)co.,Ltd UBook XPro
  ProcEnviron:
-  LANG=fr_FR.UTF-8
-  PATH=(custom, no user)
-  SHELL=/bin/bash
-  TERM=xterm-256color
-  XDG_RUNTIME_DIR=<set>
+  LANG=fr_FR.UTF-8
+  PATH=(custom, no user)
+  SHELL=/bin/bash
+  TERM=xterm-256color
+  XDG_RUNTIME_DIR=<set>
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-22-generic 
root=UUID=e347abff-820e-406b-a8f7-db18c8f87257 ro 
cryptdevice=UUID=b1b3e7ac-0210-4e10-a27b-159bcc5cc898:root splash
  SourcePackage: xorg
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/05/2021
  dmi.bios.release: 5.12
  dmi.bios.vendor: American Megatrends
  dmi.bios.version: ZW-BI-13-SF133KR300-KB60C-066-E
  dmi.board.asset.tag: Default string
  dmi.board.name: UBook XPro
  dmi.board.vendor: CHUWI Innovation And Technology(ShenZhen)co.,Ltd
  dmi.board.version: Default string
  dmi.chassis.asset.tag: Default string
  dmi.chassis.type: 10
  dmi.chassis.vendor: CHUWI Innovation And Technology(ShenZhen)co.,Ltd
  dmi.chassis.version: Default string
  dmi.ec.firmware.release: 3.2
  dmi.modalias: 
dmi:bvnAmericanMegatrends:bvrZW-BI-13-SF133KR300-KB60C-066-E:bd11/05/2021:br5.12:efr3.2:svnCHUWIInnovationAndTechnology(ShenZhen)co.,Ltd:pnUBookXPro:pvrDefaultstring:rvnCHUWIInnovationAndTechnology(ShenZhen)co.,Ltd:rnUBookXPro:rvrDefaultstring:cvnCHUWIInnovationAndTechnology(ShenZhen)co.,Ltd:ct10:cvrDefaultstring:skuS5K3_A1:pfaTablet:
  dmi.product.family: Tablet
  dmi.product.name: UBook XPro
  dmi.product.sku: S5K3_A1
  dmi.product.version: Default string
  dmi.sys.vendor: CHUWI Innovation And Technology(ShenZhen)co.,Ltd
  version.compiz: compiz 1:0.9.14.2+25.10.20250930-0ubuntu3
  version.libdrm2: libdrm2 2.4.131-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 26.0.3-1ubuntu1
  version.libgl1-mesa-glx: libgl1-mesa-glx N/A
  version.xserver-xorg-core: xserver-xorg-core 2:21.1.22-1ubuntu1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:22.0.0-1build2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20210115-1build2
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:1.0.18-1build1

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https://bugs.launchpad.net/bugs/2157554

Title:
  Xubuntu 26.04 Graphical session Xorg Crash

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