$ cat Xorg.0.log
[ 425.827]
X.Org X Server 1.20.10
X Protocol Version 11, Revision 0
[ 425.829] Build Operating System: Linux 5.4.48-gentoo-noram aarch64 Gentoo
[ 425.830] Current Operating System: Linux tx9s 5.10.27-gentoo #1 SMP PREEMPT Sat May 8 09:58:59 MSK 2021 aarch64
[ 425.830] Kernel command line: root=/dev/mmcblk1p2 rootwait rootfstype=ext4 rootflags=data=writeback console=ttyAML0,115200n8 console=tty0,38400
[ 425.831] Build Date: 10 April 2021 01:54:47AM
[ 425.831]
[ 425.832] Current version of pixman: 0.40.0
[ 425.833] Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
[ 425.833] Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 425.836] (==) Log file: "/var/log/Xorg.0.log", Time: Sat May 8 15:07:27 2021
[ 425.837] (==) Using config directory: "/etc/X11/xorg.conf.d"
[ 425.837] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[ 425.838] (==) No Layout section. Using the first Screen section.
[ 425.838] (==) No screen section available. Using defaults.
[ 425.838] (**) |-->Screen "Default Screen Section" (0)
[ 425.838] (**) | |-->Monitor "<default monitor>"
[ 425.839] (==) No monitor specified for screen "Default Screen Section".
Using a default monitor configuration.
[ 425.839] (**) Option "BlankTime" "0"
[ 425.839] (**) Option "StandbyTime" "0"
[ 425.839] (**) Option "OffTime" "0"
[ 425.839] (==) Automatically adding devices
[ 425.839] (==) Automatically enabling devices
[ 425.839] (==) Automatically adding GPU devices
[ 425.839] (==) Max clients allowed: 256, resource mask: 0x1fffff
[ 425.839] (WW) The directory "/usr/share/fonts/TTF/" does not exist.
[ 425.839] Entry deleted from font path.
[ 425.839] (WW) The directory "/usr/share/fonts/OTF/" does not exist.
[ 425.839] Entry deleted from font path.
[ 425.839] (WW) The directory "/usr/share/fonts/Type1/" does not exist.
[ 425.839] Entry deleted from font path.
[ 425.839] (WW) `fonts.dir' not found (or not valid) in "/usr/share/fonts/100dpi/".
[ 425.839] Entry deleted from font path.
[ 425.839] (Run 'mkfontdir' on "/usr/share/fonts/100dpi/").
[ 425.839] (WW) `fonts.dir' not found (or not valid) in "/usr/share/fonts/75dpi/".
[ 425.839] Entry deleted from font path.
[ 425.839] (Run 'mkfontdir' on "/usr/share/fonts/75dpi/").
[ 425.839] (==) FontPath set to:
/usr/share/fonts/misc/
[ 425.839] (==) ModulePath set to "/usr/lib64/xorg/modules"
[ 425.840] (II) The server relies on udev to provide the list of input devices.
If no devices become available, reconfigure udev or disable AutoAddDevices.
[ 425.840] (II) Loader magic: 0xaaaaca995c10
[ 425.840] (II) Module ABI versions:
[ 425.840] X.Org ANSI C Emulation: 0.4
[ 425.840] X.Org Video Driver: 24.1
[ 425.840] X.Org XInput driver : 24.1
[ 425.840] X.Org Server Extension : 10.0
[ 425.841] (II) xfree86: Adding drm device (/dev/dri/card1)
[ 425.842] (II) xfree86: Adding drm device (/dev/dri/card0)
[ 425.847] (II) no primary bus or device found
[ 425.847] falling back to /sys/devices/platform/soc/d0000000.apb/d00c0000.gpu/drm/card1
[ 425.847] (II) LoadModule: "glx"
[ 425.848] (II) Loading /usr/lib64/xorg/modules/extensions/libglx.so
[ 425.854] (II) Module glx: vendor="X.Org Foundation"
[ 425.854] compiled for 1.20.10, module version = 1.0.0
[ 425.854] ABI class: X.Org Server Extension, version 10.0
[ 425.854] (==) Matched modesetting as autoconfigured driver 0
[ 425.854] (==) Matched fbdev as autoconfigured driver 1
[ 425.854] (==) Assigned the driver to the xf86ConfigLayout
[ 425.854] (II) LoadModule: "modesetting"
[ 425.855] (II) Loading /usr/lib64/xorg/modules/drivers/modesetting_drv.so
[ 425.856] (II) Module modesetting: vendor="X.Org Foundation"
[ 425.856] compiled for 1.20.10, module version = 1.20.10
[ 425.856] Module class: X.Org Video Driver
[ 425.856] ABI class: X.Org Video Driver, version 24.1
[ 425.856] (II) LoadModule: "fbdev"
[ 425.857] (WW) Warning, couldn't open module fbdev
[ 425.857] (EE) Failed to load module "fbdev" (module does not exist, 0)
[ 425.857] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
[ 425.857] (--) using VT number 12
[ 425.891] (WW) Falling back to old probe method for modesetting
[ 425.896] (II) modeset(0): using default device
[ 425.913] (II) modeset(G0): using drv /dev/dri/card0
[ 425.914] (EE)
Fatal server error:
[ 425.914] (EE) Cannot run in framebuffer mode. Please specify busIDs for all framebuffer devices
[ 425.914] (EE)
[ 425.915] (EE)
Please consult the The X.Org Foundation support
at http://wiki.x.org
for help.
[ 425.915] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[ 425.916] (EE)
[ 426.041] (EE) Server terminated with error (1). Closing log file.
До этого не видел ничего подобного, что значит фреймбуфферная сессия?
