I'm a bit confused on what happened to my debian strech the other day, and how come that I can only use Gnome Wayland to access my display manager, to be clear if I choose Gnome I've got Login Loop triggered.

Simple inspection of my graphic card gives me this output.

 ➜  ~ lspci | grep VGA

00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 0b)



➜  ~ find /dev -group video

/dev/video1

/dev/video0

find: ‘/dev/vboxusb’: Permission denied

/dev/fb0

/dev/dri/card0

/dev/dri/renderD128

➜  ~ glxinfo | grep -i vendor

server glx vendor string: SGI

client glx vendor string: Mesa Project and SGI

    Vendor: Intel Open Source Technology Center (0x8086)

OpenGL vendor string: Intel Open Source Technology Center

Now inspecting /var/log/Xorg.0.log will trow

➜  ~ cat /var/log/Xorg.0.log 

[   643.622] 

X.Org X Server 1.19.2

Release Date: 2017-03-02

[   643.622] X Protocol Version 11, Revision 0

[   643.622] Build Operating System: Linux 4.9.0-8-amd64 x86_64 Debian

[   643.622] Current Operating System: Linux copser 4.9.0-8-amd64 #1 SMP Debian 4.9.130-2 (2018-10-27) x86_64

[   643.622] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.9.0-8-amd64 root=UUID=4570a77b-2b71-4db8-815b-99dd3f651a7b ro quiet

[   643.622] Build Date: 03 November 2018  03:09:11AM

[   643.623] xorg-server 2:1.19.2-1+deb9u5 (https://www.debian.org/support) 

[   643.623] Current version of pixman: 0.34.0

[   643.623]    Before reporting problems, check http://wiki.x.org

    to make sure that you have the latest version.

[   643.623] Markers: (--) probed, (**) from config file, (==) default setting,

    (++) from command line, (!!) notice, (II) informational,

    (WW) warning, (EE) error, (NI) not implemented, (??) unknown.

[   643.624] (==) Log file: "/var/log/Xorg.0.log", Time: Fri Jan 11 19:23:59 2019

[   643.624] (II) Loader magic: 0x562a30492e00

[   643.624] (II) Module ABI versions:

[   643.624]    X.Org ANSI C Emulation: 0.4

[   643.624]    X.Org Video Driver: 23.0

[   643.624]    X.Org XInput driver : 24.1

[   643.624]    X.Org Server Extension : 10.0

[   643.625] (--) using VT number 1



[   643.625] (II) systemd-logind: logind integration requires -keeptty and -keeptty was not provided, disabling logind integration

[   643.626] (II) xfree86: Adding drm device (/dev/dri/card0)

[   643.631] (--) PCI:*(0:0:2:0) 8086:0a16:17aa:2218 rev 11, Mem @ 0xe0000000/4194304, 0xc0000000/536870912, I/O @ 0x00003000/64, BIOS @ 0x????????/131072

[   643.632] List of video drivers:

[   643.632]    amdgpu

[   643.632]    ati

[   643.632]    nouveau

[   643.632]    qxl

[   643.632]    radeon

[   643.632]    vmware

[   643.632]    vesa

[   643.632]    modesetting

[   643.632]    fbdev

[   643.632]    intel

[   643.632] (II) LoadModule: "amdgpu"

[   643.632] (II) Loading /usr/lib/xorg/modules/drivers/amdgpu_drv.so

[   643.637] (II) Module amdgpu: vendor="X.Org Foundation"

[   643.637]    compiled for 1.19.0, module version = 1.2.0

[   643.637]    Module class: X.Org Video Driver

[   643.637]    ABI class: X.Org Video Driver, version 23.0

[   643.637] (II) LoadModule: "ati"

[   643.637] (II) Loading /usr/lib/xorg/modules/drivers/ati_drv.so

[   643.637] (II) Module ati: vendor="X.Org Foundation"

[   643.637]    compiled for 1.19.0, module version = 7.8.0

[   643.637]    Module class: X.Org Video Driver

[   643.637]    ABI class: X.Org Video Driver, version 23.0

[   643.637] (II) LoadModule: "nouveau"

[   643.638] (II) Loading /usr/lib/xorg/modules/drivers/nouveau_drv.so

[   643.640] (II) Module nouveau: vendor="X.Org Foundation"

[   643.640]    compiled for 1.19.3, module version = 1.0.13

[   643.640]    Module class: X.Org Video Driver

[   643.640]    ABI class: X.Org Video Driver, version 23.0

[   643.640] (II) LoadModule: "qxl"

[   643.640] (II) Loading /usr/lib/xorg/modules/drivers/qxl_drv.so

[   643.641] (II) Module qxl: vendor="X.Org Foundation"

[   643.641]    compiled for 1.19.0, module version = 0.1.4

[   643.641]    Module class: X.Org Video Driver

[   643.641]    ABI class: X.Org Video Driver, version 23.0

[   643.641] (II) LoadModule: "radeon"

[   643.641] (II) Loading /usr/lib/xorg/modules/drivers/radeon_drv.so

[   643.644] (II) Module radeon: vendor="X.Org Foundation"

[   643.644]    compiled for 1.19.0, module version = 7.8.0

[   643.644]    Module class: X.Org Video Driver

[   643.644]    ABI class: X.Org Video Driver, version 23.0

[   643.644] (II) LoadModule: "vmware"

[   643.644] (II) Loading /usr/lib/xorg/modules/drivers/vmware_drv.so

[   643.672] (II) Module vmware: vendor="X.Org Foundation"

[   643.672]    compiled for 1.19.0, module version = 13.2.1

[   643.672]    Module class: X.Org Video Driver

[   643.672]    ABI class: X.Org Video Driver, version 23.0

[   643.672] (II) LoadModule: "vesa"

[   643.672] (II) Loading /usr/lib/xorg/modules/drivers/vesa_drv.so

[   643.672] (II) Module vesa: vendor="X.Org Foundation"

[   643.672]    compiled for 1.19.0, module version = 2.3.4

[   643.672]    Module class: X.Org Video Driver

[   643.672]    ABI class: X.Org Video Driver, version 23.0

[   643.672] (II) LoadModule: "modesetting"

[   643.672] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so

[   643.672] (II) Module modesetting: vendor="X.Org Foundation"

[   643.672]    compiled for 1.19.2, module version = 1.19.2

[   643.672]    Module class: X.Org Video Driver

[   643.672]    ABI class: X.Org Video Driver, version 23.0

[   643.672] (II) LoadModule: "fbdev"

[   643.673] (II) Loading /usr/lib/xorg/modules/drivers/fbdev_drv.so

[   643.673] (II) Module fbdev: vendor="X.Org Foundation"

[   643.673]    compiled for 1.19.0, module version = 0.4.4

[   643.673]    Module class: X.Org Video Driver

[   643.673]    ABI class: X.Org Video Driver, version 23.0

[   643.673] (II) LoadModule: "intel"

[   643.673] (II) Loading /usr/lib/xorg/modules/drivers/intel_drv.so

[   643.676] (II) Module intel: vendor="X.Org Foundation"

[   643.676]    compiled for 1.19.0, module version = 2.99.917

[   643.676]    Module class: X.Org Video Driver

[   643.676]    ABI class: X.Org Video Driver, version 23.0

[   643.676] (II) VESA: driver for VESA chipsets: vesa

[   643.676] (II) modesetting: Driver for Modesetting Kernel Drivers: kms

[   643.676] (II) FBDEV: driver for framebuffer: fbdev

[   643.676] (II) intel: Driver for Intel(R) Integrated Graphics Chipsets:

    i810, i810-dc100, i810e, i815, i830M, 845G, 854, 852GM/855GM, 865G,

    915G, E7221 (i915), 915GM, 945G, 945GM, 945GME, Pineview GM,

    Pineview G, 965G, G35, 965Q, 946GZ, 965GM, 965GME/GLE, G33, Q35, Q33,

    GM45, 4 Series, G45/G43, Q45/Q43, G41, B43

[   643.676] (II) intel: Driver for Intel(R) HD Graphics

[   643.676] (II) intel: Driver for Intel(R) Iris(TM) Graphics

[   643.676] (II) intel: Driver for Intel(R) Iris(TM) Pro Graphics

[   643.811] (++) Using config file: "/root/xorg.conf.new"

[   643.811] (==) Using system config directory "/usr/share/X11/xorg.conf.d"

[   643.811] (==) ServerLayout "X.org Configured"

[   643.811] (**) |-->Screen "Screen0" (0)

[   643.811] (**) |   |-->Monitor "Monitor0"

[   643.811] (**) |   |-->Device "Card0"

[   643.811] (**) |-->Input Device "Mouse0"

[   643.811] (**) |-->Input Device "Keyboard0"

[   643.811] (==) Automatically adding devices

[   643.811] (==) Automatically enabling devices

[   643.812] (==) Automatically adding GPU devices

[   643.812] (==) Max clients allowed: 256, resource mask: 0x1fffff

[   643.812] (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.

[   643.812]    Entry deleted from font path.

[   643.812] (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.

[   643.812]    Entry deleted from font path.

[   643.812] (**) FontPath set to:

    /usr/share/fonts/X11/misc,

    /usr/share/fonts/X11/100dpi/:unscaled,

    /usr/share/fonts/X11/75dpi/:unscaled,

    /usr/share/fonts/X11/Type1,

    /usr/share/fonts/X11/100dpi,

    /usr/share/fonts/X11/75dpi,

    built-ins,

    /usr/share/fonts/X11/misc,

    /usr/share/fonts/X11/100dpi/:unscaled,

    /usr/share/fonts/X11/75dpi/:unscaled,

    /usr/share/fonts/X11/Type1,

    /usr/share/fonts/X11/100dpi,

    /usr/share/fonts/X11/75dpi,

    built-ins

[   643.812] (**) ModulePath set to "/usr/lib/xorg/modules"

[   643.812] (WW) Hotplugging is on, devices using drivers 'kbd', 'mouse' or 'vmmouse' will be disabled.

[   643.812] (WW) Disabling Mouse0

[   643.812] (WW) Disabling Keyboard0

[   643.812] vesa: Ignoring device with a bound kernel driver

[   643.812] (WW) Falling back to old probe method for vesa

[   643.812] (EE) 

[   643.812] (EE) Backtrace:

[   643.813] (EE) 0: /usr/lib/xorg/Xorg (xorg_backtrace+0x4a) [0x562a3020566a]

[   643.814] (EE) 1: /usr/lib/xorg/Xorg (0x562a3004c000+0x1bd3f9) [0x562a302093f9]

[   643.815] (EE) 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7f7ce7fe3000+0x110c0) [0x7f7ce7ff40c0]

[   643.816] (EE) 

[   643.817] (EE) Segmentation fault at address 0x0

[   643.818] (EE) 

Fatal server error:

[   643.820] (EE) Caught signal 11 (Segmentation fault). Server aborting

[   643.821] (EE) 

[   643.822] (EE) 

Please consult the The X.Org Foundation support 

     at http://wiki.x.org

 for help. 

[   643.826] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.

[   643.827] (EE) 

[   643.828] (EE) Server terminated with error (1). Closing log file.

I did try to read the xorg docs and do the configuration part because I was missing xorg.conf file, so the above output is generated from trying to

What if I do not have a xorg config file? If xorg.conf is missing for
some reason, Xorg will probe your hardware on every startup. Though
this works fine in most cases, some settings remain inaccessible. To
create a starting point for customization, do the following.

Switch to a console as root (not a terminal emulator in X), then run:

/etc/init.d/gdm stop || /etc/init.d/gdm3 stop || /etc/init.d/kdm stop || /etc/init.d/xdm stop || /etc/init.d/lightdm stop $ cd

/etc/X11/

Xorg -configure Alternatively, reboot the machine in single user mode, then run: $ cd /etc/X11/

Xorg -configure Follow the on-screen instructions. This should give you something to work with.

Because this is the first time I'm seeing this I'm not sure what is happening, so can anyone explain me what is going on and how can I fix this, thanks.