I'm running a trixie main contrib non-free non-free-firmware.
Context : 6.12.74+deb13+1-amd64 to 6.12.85+deb13-amd64
An update, upgrade, dist-upgrade have changed my 6.12.74+deb13+1-amd64 to 6.12.85+deb13-amd64.
from /var/log/apt/term.log.1:
Log started: 2026-04-30 23:54:14
(Lecture de la base de données... [...]
(Lecture de la base de données... 100%
(Lecture de la base de données... 867391 fichiers et répertoires déjà installés.)
Préparation du dépaquetage de .../linux-libc-dev_6.12.85-1_all.deb ...
Dépaquetage de linux-libc-dev (6.12.85-1) sur (6.12.74-2) ...
Paramétrage de linux-libc-dev (6.12.85-1) ...
Log ended: 2026-04-30 23:54:15
Log started: 2026-04-30 23:54:24
Sélection du paquet linux-image-6.12.85+deb13-amd64 précédemment désélectionné.
(Lecture de la base de données... [...]
(Lecture de la base de données... 100%
(Lecture de la base de données... 867391 fichiers et répertoires déjà installés.)
Préparation du dépaquetage de .../linux-image-6.12.85+deb13-amd64_6.12.85-1_amd64.deb ...
Dépaquetage de linux-image-6.12.85+deb13-amd64 (6.12.85-1) ...
Préparation du dépaquetage de .../linux-image-amd64_6.12.85-1_amd64.deb ...
Dépaquetage de linux-image-amd64 (6.12.85-1) sur (6.12.74-2) ...
Paramétrage de linux-image-6.12.85+deb13-amd64 (6.12.85-1) ...
I: /vmlinuz.old is now a symlink to boot/vmlinuz-6.12.74+deb13+1-amd64
I: /initrd.img.old is now a symlink to boot/initrd.img-6.12.74+deb13+1-amd64
I: /vmlinuz is now a symlink to boot/vmlinuz-6.12.85+deb13-amd64
I: /initrd.img is now a symlink to boot/initrd.img-6.12.85+deb13-amd64
/etc/kernel/postinst.d/dkms:
Automatic installation of modules for kernel 6.12.85+deb13-amd64 was skipped since the kernel headers for this kernel do not seem to be installed.
/etc/kernel/postinst.d/initramfs-tools:
update-initramfs: Generating /boot/initrd.img-6.12.85+deb13-amd64
/etc/kernel/postinst.d/zz-update-grub:
Generating grub configuration file ...
Found background image: /usr/share/images/desktop-base/desktop-grub.png
Found linux image: /boot/vmlinuz-6.12.85+deb13-amd64
Found initrd image: /boot/initrd.img-6.12.85+deb13-amd64
Found linux image: /boot/vmlinuz-6.12.74+deb13+1-amd64
Found initrd image: /boot/initrd.img-6.12.74+deb13+1-amd64
Found linux image: /boot/vmlinuz-6.1.0-44-amd64
Found initrd image: /boot/initrd.img-6.1.0-44-amd64
Warning: os-prober will not be executed to detect other bootable partitions.
Systems on them will not be added to the GRUB boot configuration.
Check GRUB_DISABLE_OS_PROBER documentation entry.
Adding boot menu entry for UEFI Firmware Settings ...
done
Paramétrage de linux-image-amd64 (6.12.85-1) ...
Log ended: 2026-04-30 23:54:41
A jump from
74to85? Is it normal?is "Automatic installation of modules for kernel 6.12.85+deb13-amd64 was skipped since the kernel headers for this kernel do not seem to be installed." a normal message?
I was a bit alarmed reading it.
But dist-update didn't look alarmed itself, so I don't now if it's important...
At reboot gdm-x-session fails on munmap_chunk(): invalid pointer
In short, at reboot time gdm-x-session fails on:
(on screen at boot time: after the Starting gdm.service... message coming, the screen turns black with a single blinking cursor)
munmap_chunk(): invalid pointer
Backtrace:
unw_get_proc_name failed: no unwind info found [-10]
0: /usr/lib/xorg/Xorg (?+0x0) [0x55e3aeec4c6d]
unw_get_proc_name failed: no unwind info found [-10]
1: /lib/x86_64-linux-gnu/libc.so.6 (?+0x0) [0x7f76f203adf0]
2: /lib/x86_64-linux-gnu/libc.so.6 (__pthread_kill_implementation+0x10c) [0x7f76f208f95c]
3: /lib/x86_64-linux-gnu/libc.so.6 (__GI_raise+0x12) [0x7f76f203acc2]
4: /lib/x86_64-linux-gnu/libc.so.6 (__GI_abort+0x22) [0x7f76f20234ac]
5: /lib/x86_64-linux-gnu/libc.so.6 (__libc_message_impl.cold+0x5) [0x7f76f2024291]
6: /lib/x86_64-linux-gnu/libc.so.6 (malloc_printerr+0x15) [0x7f76f2099465]
7: /lib/x86_64-linux-gnu/libc.so.6 (munmap_chunk+0x7c) [0x7f76f20996ec]
8: /lib/x86_64-linux-gnu/libc.so.6 (__free+0x158) [0x7f76f209e3d8]
9: /lib/x86_64-linux-gnu/libdrm.so.2 (drmFreeDevice+0x7d) [0x7f76f252913d]
10: /lib/x86_64-linux-gnu/libdrm.so.2 (drmFreeDevices+0x2e) [0x7f76f25292ae]
unw_get_proc_name failed: no unwind info found [-10]
11: /lib/x86_64-linux-gnu/libnvidia-egl-gbm.so.1 (?+0x0) [0x7f76f0df9f38]
unw_get_proc_name failed: no unwind info found [-10]
12: /lib/x86_64-linux-gnu/libEGL_nvidia.so.0 (?+0x0) [0x7f76f0eadcb0]
unw_get_proc_name failed: no unwind info found [-10]
13: /lib/x86_64-linux-gnu/libEGL_nvidia.so.0 (?+0x0) [0x7f76f0e4cd9c]
unw_get_proc_name failed: no unwind info found [-10]
14: /lib/x86_64-linux-gnu/libEGL.so.1 (?+0x0) [0x7f76f1291ad5]
unw_get_proc_name failed: no unwind info found [-10]
15: /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so (?+0x0) [0x7f76f13043f3]
unw_get_proc_name failed: no unwind info found [-10]
16: /usr/lib/xorg/modules/extensions/libglx.so (?+0x0) [0x7f76f1cdbc73]
unw_get_proc_name failed: no unwind info found [-10]
17: /usr/lib/xorg/modules/extensions/libglx.so (?+0x0) [0x7f76f1cdaadf]
18: /usr/lib/xorg/Xorg (_CallCallbacks+0x3c) [0x55e3aed4d1cc]
unw_get_proc_name failed: no unwind info found [-10]
19: /usr/lib/xorg/Xorg (?+0x0) [0x55e3aee7f16f]
20: /usr/lib/xorg/Xorg (InitExtensions+0x89) [0x55e3aedbac69]
unw_get_proc_name failed: no unwind info found [-10]
21: /usr/lib/xorg/Xorg (?+0x0) [0x55e3aed4bae8]
22: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_call_main+0x78) [0x7f76f2024ca8]
23: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main_alias_2+0x85) [0x7f76f2024d65]
24: /usr/lib/xorg/Xorg (_start+0x21) [0x55e3aed34641]
Fatal server error:
(EE) Caught signal 6 (Aborted). Server aborting
(EE)
(EE)
Please consult the The X.Org Foundation support
#011 at http://wiki.x.org
for help.
(EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
(EE)
(EE) Server terminated with error (1). Closing log file.
Unable to run X server
debian gdm3: Gdm: GdmDisplay: Session never registered, failing
debian systemd[1]: session-c5.scope: Deactivated successfully.
debian gdm3: Gdm: Child process -2894 was already dead.
debian gdm3: Gdm: GdmDisplay: Session never registered, failing
debian gdm3: Gdm: Child process -2894 was already dead.
Is there something I can check?
Or should I only wait for a patch, because I might not be the only one affected by such problem?
Longer logs
Unless otherwise mentioned, all the logs are from debian /usr/libexec/gdm-x-session[2896], removed at the beginning of each line to improve readability.
(--) Log file renamed from "/var/log/Xorg.pid-2896.log" to "/var/log/Xorg.0.log"
X.Org X Server 1.21.1.16
X Protocol Version 11, Revision 0
Current Operating System: Linux debian 6.12.85+deb13-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.85-1 (2026-04-30) x86_64
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-6.12.85+deb13-amd64 root=UUID=26f4213d-da74-4635-9328-b1223ecb8183 ro quiet
xorg-server 2:21.1.16-1.3+deb13u1 (https://www.debian.org/support)
Current version of pixman: 0.44.0
#011Before reporting problems, check http://wiki.x.org
#011to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
#011(++) from command line, (!!) notice, (II) informational,
#011(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Thu Apr 30 23:59:51 2026
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
(==) No Layout section. Using the first Screen section.
(==) No screen section available. Using defaults.
(**) |-->Screen "Default Screen Section" (0)
(**) | |-->Monitor "<default monitor>"
(==) No monitor specified for screen "Default Screen Section".
#011Using a default monitor configuration.
(**) Allowing byte-swapped clients
(==) Automatically adding devices
(==) Automatically enabling devices
(==) Automatically adding GPU devices
(==) Automatically binding GPU devices
(==) Max clients allowed: 256, resource mask: 0x1fffff
(WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
#011Entry deleted from font path.
(==) FontPath set to:
#011/usr/share/fonts/X11/misc,
#011/usr/share/fonts/X11/100dpi/:unscaled,
#011/usr/share/fonts/X11/75dpi/:unscaled,
#011/usr/share/fonts/X11/Type1,
#011/usr/share/fonts/X11/100dpi,
#011/usr/share/fonts/X11/75dpi,
#011built-ins
(==) ModulePath set to "/usr/lib/xorg/modules"
(II) The server relies on udev to provide the list of input devices.
#011If no devices become available, reconfigure udev or disable AutoAddDevices.
(II) Loader magic: 0x55e3aef59f00
(II) Module ABI versions:
#011X.Org ANSI C Emulation: 0.4
#011X.Org Video Driver: 25.2
#011X.Org XInput driver : 24.4
#011X.Org Server Extension : 10.0
(++) using VT number 1
(II) systemd-logind: took control of session /org/freedesktop/login1/session/c5
(--) PCI:*(6@0:0:0) 10de:1c03:1462:3283 rev 161, Mem @ 0xfb000000/16777216, 0xd0000000/268435456, 0xe0000000/33554432, I/O @ 0x0000e000/128, BIOS @ 0x????????/131072
(II) LoadModule: "glx"
(II) Loading /usr/lib/xorg/modules/extensions/libglx.so
(II) Module glx: vendor="X.Org Foundation"
#011compiled for 1.21.1.16, module version = 1.0.0
#011ABI class: X.Org Server Extension, version 10.0
to get percentage from UPower: org.freedesktop.DBus.Error.NameHasNoOwner
(==) Matched nouveau as autoconfigured driver 0
(==) Matched nv as autoconfigured driver 1
(==) Matched modesetting as autoconfigured driver 2
(==) Matched fbdev as autoconfigured driver 3
(==) Matched vesa as autoconfigured driver 4
(==) Assigned the driver to the xf86ConfigLayout
(II) LoadModule: "nouveau"
(II) Loading /usr/lib/xorg/modules/drivers/nouveau_drv.so
(II) Module nouveau: vendor="X.Org Foundation"
#011compiled for 1.21.1.15, module version = 1.0.18
#011Module class: X.Org Video Driver
#011ABI class: X.Org Video Driver, version 25.2
(II) LoadModule: "nv"
(WW) Warning, couldn't open module nv
(EE) Failed to load module "nv" (module does not exist, 0)
(II) LoadModule: "modesetting"
(II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so
(II) Module modesetting: vendor="X.Org Foundation"
#011compiled for 1.21.1.16, module version = 1.21.1
#011Module class: X.Org Video Driver
#011ABI class: X.Org Video Driver, version 25.2
(II) LoadModule: "fbdev"
(II) Loading /usr/lib/xorg/modules/drivers/fbdev_drv.so
(II) Module fbdev: vendor="X.Org Foundation"
#011compiled for 1.21.1.3, module version = 0.5.0
#011Module class: X.Org Video Driver
#011ABI class: X.Org Video Driver, version 25.2
(II) LoadModule: "vesa"
(II) Loading /usr/lib/xorg/modules/drivers/vesa_drv.so
(II) Module vesa: vendor="X.Org Foundation"
#011compiled for 1.21.1.15, module version = 2.6.0
#011Module class: X.Org Video Driver
#011ABI class: X.Org Video Driver, version 25.2
(II) NOUVEAU driver Date: Thu Nov 7 13:15:35 2024 -0500
(II) NOUVEAU driver for NVIDIA chipset families :
#011RIVA TNT (NV04)
#011RIVA TNT2 (NV05)
#011GeForce 256 (NV10)
#011GeForce 2 (NV11, NV15)
#011GeForce 4MX (NV17, NV18)
#011GeForce 3 (NV20)
#011GeForce 4Ti (NV25, NV28)
#011GeForce FX (NV3x)
#011GeForce 6 (NV4x)
#011GeForce 7 (G7x)
#011GeForce 8 (G8x)
#011GeForce 9 (G9x)
#011GeForce GTX 2xx/3xx (GT2xx)
#011GeForce GTX 4xx/5xx (GFxxx)
#011GeForce GTX 6xx/7xx (GKxxx)
#011GeForce GTX 9xx (GMxxx)
#011GeForce GTX 10xx (GPxxx)
(II) modesetting: Driver for Modesetting Kernel Drivers: kms
(II) FBDEV: driver for framebuffer: fbdev
(II) VESA: driver for VESA chipsets: vesa
(EE) [drm] Failed to open DRM device for pci:0000:06:00.0: -19
(EE) open /dev/dri/card0: No such file or directory
(WW) Falling back to old probe method for modesetting
(EE) open /dev/dri/card0: No such file or directory
(II) Loading sub module "fbdevhw"
(II) LoadModule: "fbdevhw"
(II) Loading /usr/lib/xorg/modules/libfbdevhw.so
(II) Module fbdevhw: vendor="X.Org Foundation"
#011compiled for 1.21.1.16, module version = 0.0.2
#011ABI class: X.Org Video Driver, version 25.2
(EE) Unable to find a valid framebuffer device
(WW) Falling back to old probe method for fbdev
(II) Loading sub module "fbdevhw"
(II) LoadModule: "fbdevhw"
(II) Loading /usr/lib/xorg/modules/libfbdevhw.so
(II) Module fbdevhw: vendor="X.Org Foundation"
#011compiled for 1.21.1.16, module version = 0.0.2
#011ABI class: X.Org Video Driver, version 25.2
(II) FBDEV(2): using default device
vesa: Refusing to run, Framebuffer or dri device present
(EE) Screen 0 deleted because of no matching config section.
(II) UnloadModule: "modesetting"
(EE) Screen 0 deleted because of no matching config section.
(II) UnloadModule: "fbdev"
(II) UnloadSubModule: "fbdevhw"
(II) FBDEV(0): Creating default Display subsection in Screen section
#011"Default Screen Section" for depth/fbbpp 24/32
(==) FBDEV(0): Depth 24, (==) framebuffer bpp 32
(==) FBDEV(0): RGB weight 888
(==) FBDEV(0): Default visual is TrueColor
(==) FBDEV(0): Using gamma correction (1.0, 1.0, 1.0)
(II) FBDEV(0): hardware: EFI VGA (video memory: 3072kB)
(DB) xf86MergeOutputClassOptions unsupported bus type 0
(II) FBDEV(0): checking modes against framebuffer device...
(II) FBDEV(0): checking modes against monitor...
(II) FBDEV(0): Virtual size is 1024x768 (pitch 1024)
(**) FBDEV(0): Built-in mode "current": 78.7 MHz, 59.9 kHz, 75.7 Hz
(II) FBDEV(0): Modeline "current"x0.0 78.65 1024 1056 1184 1312 768 772 776 792 -hsync -vsync -csync (59.9 kHz b)
(==) FBDEV(0): DPI set to (96, 96)
(II) Loading sub module "fb"
(II) LoadModule: "fb"
(II) Module "fb" already built-in
(**) FBDEV(0): using shadow framebuffer
(II) Loading sub module "shadow"
(II) LoadModule: "shadow"
(II) Loading /usr/lib/xorg/modules/libshadow.so
(II) Module shadow: vendor="X.Org Foundation"
#011compiled for 1.21.1.16, module version = 1.1.0
#011ABI class: X.Org ANSI C Emulation, version 0.4
(II) FBDEV(0): FBIOBLANK: Invalid argument (Screen blanking not supported by kernel - disabling)
(==) FBDEV(0): Backing store enabled
(==) FBDEV(0): DPMS enabled
(II) Initializing extension Generic Event Extension
(II) Initializing extension SHAPE
(II) Initializing extension MIT-SHM
(II) Initializing extension XInputExtension
(II) Initializing extension XTEST
(II) Initializing extension BIG-REQUESTS
(II) Initializing extension SYNC
(II) Initializing extension XKEYBOARD
(II) Initializing extension XC-MISC
(II) Initializing extension SECURITY
backs suppressed
7586392.736:171): apparmor="ALLOWED" operation="open" class="file" profile="Xorg" name="/dev/" pid=2896 comm="Xorg" requested_mask="r" denied_mask="r" fsuid=0 ouid=0
(II) Initializing extension XFIXES
(II) Initializing extension RENDER
(II) Initializing extension RANDR
(II) Initializing extension COMPOSITE
(II) Initializing extension DAMAGE
(II) Initializing extension MIT-SCREEN-SAVER
(II) Initializing extension DOUBLE-BUFFER
(II) Initializing extension RECORD
(II) Initializing extension DPMS
(II) Initializing extension Present
(II) Initializing extension DRI3
(II) Initializing extension X-Resource
(II) Initializing extension XVideo
(II) Initializing extension XVideo-MotionCompensation
(II) Initializing extension SELinux
(II) SELinux: Disabled on system
(II) Initializing extension GLX
(II) AIGLX: Screen 0 is not DRI2 capable
7586392.744:172): apparmor="ALLOWED" operation="open" class="file" profile="Xorg" name="/proc/2896/comm" pid=2896 comm="Xorg" requested_mask="r" denied_mask="r" fsuid=0 ouid=0
munmap_chunk(): invalid pointer
(EE)
(EE) Backtrace:
(EE) unw_get_proc_name failed: no unwind info found [-10]
(EE) 0: /usr/lib/xorg/Xorg (?+0x0) [0x55e3aeec4c6d]
(EE) unw_get_proc_name failed: no unwind info found [-10]
(EE) 1: /lib/x86_64-linux-gnu/libc.so.6 (?+0x0) [0x7f76f203adf0]
(EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (__pthread_kill_implementation+0x10c) [0x7f76f208f95c]
(EE) 3: /lib/x86_64-linux-gnu/libc.so.6 (__GI_raise+0x12) [0x7f76f203acc2]
(EE) 4: /lib/x86_64-linux-gnu/libc.so.6 (__GI_abort+0x22) [0x7f76f20234ac]
(EE) 5: /lib/x86_64-linux-gnu/libc.so.6 (__libc_message_impl.cold+0x5) [0x7f76f2024291]
(EE) 6: /lib/x86_64-linux-gnu/libc.so.6 (malloc_printerr+0x15) [0x7f76f2099465]
(EE) 7: /lib/x86_64-linux-gnu/libc.so.6 (munmap_chunk+0x7c) [0x7f76f20996ec]
(EE) 8: /lib/x86_64-linux-gnu/libc.so.6 (__free+0x158) [0x7f76f209e3d8]
(EE) 9: /lib/x86_64-linux-gnu/libdrm.so.2 (drmFreeDevice+0x7d) [0x7f76f252913d]
(EE) 10: /lib/x86_64-linux-gnu/libdrm.so.2 (drmFreeDevices+0x2e) [0x7f76f25292ae]
(EE) unw_get_proc_name failed: no unwind info found [-10]
(EE) 11: /lib/x86_64-linux-gnu/libnvidia-egl-gbm.so.1 (?+0x0) [0x7f76f0df9f38]
(EE) unw_get_proc_name failed: no unwind info found [-10]
(EE) 12: /lib/x86_64-linux-gnu/libEGL_nvidia.so.0 (?+0x0) [0x7f76f0eadcb0]
(EE) unw_get_proc_name failed: no unwind info found [-10]
(EE) 13: /lib/x86_64-linux-gnu/libEGL_nvidia.so.0 (?+0x0) [0x7f76f0e4cd9c]
(EE) unw_get_proc_name failed: no unwind info found [-10]
(EE) 14: /lib/x86_64-linux-gnu/libEGL.so.1 (?+0x0) [0x7f76f1291ad5]
(EE) unw_get_proc_name failed: no unwind info found [-10]
(EE) 15: /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so (?+0x0) [0x7f76f13043f3]
(EE) unw_get_proc_name failed: no unwind info found [-10]
(EE) 16: /usr/lib/xorg/modules/extensions/libglx.so (?+0x0) [0x7f76f1cdbc73]
(EE) unw_get_proc_name failed: no unwind info found [-10]
(EE) 17: /usr/lib/xorg/modules/extensions/libglx.so (?+0x0) [0x7f76f1cdaadf]
(EE) 18: /usr/lib/xorg/Xorg (_CallCallbacks+0x3c) [0x55e3aed4d1cc]
(EE) unw_get_proc_name failed: no unwind info found [-10]
(EE) 19: /usr/lib/xorg/Xorg (?+0x0) [0x55e3aee7f16f]
(EE) 20: /usr/lib/xorg/Xorg (InitExtensions+0x89) [0x55e3aedbac69]
(EE) unw_get_proc_name failed: no unwind info found [-10]
(EE) 21: /usr/lib/xorg/Xorg (?+0x0) [0x55e3aed4bae8]
(EE) 22: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_call_main+0x78) [0x7f76f2024ca8]
(EE) 23: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main_alias_2+0x85) [0x7f76f2024d65]
(EE) 24: /usr/lib/xorg/Xorg (_start+0x21) [0x55e3aed34641]
(EE)
(EE)
Fatal server error:
(EE) Caught signal 6 (Aborted). Server aborting
(EE)
(EE)
Please consult the The X.Org Foundation support
#011 at http://wiki.x.org
for help.
(EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
(EE)
(EE) Server terminated with error (1). Closing log file.
Unable to run X server
debian gdm3: Gdm: GdmDisplay: Session never registered, failing
debian systemd[1]: session-c5.scope: Deactivated successfully.
debian gdm3: Gdm: Child process -2894 was already dead.
debian gdm3: Gdm: GdmDisplay: Session never registered, failing
debian gdm3: Gdm: Child process -2894 was already dead.
debian systemd[1]: Started session-c6.scope - Session c6 of User Debian-gdm.
