Updating the xorg-server and xorg-server-common packages from 1.20.8-3 to 1.20.9-1 (Aarch64) breaks the X-server on my pinebook pro. I've tried both mesa and mesa-git and the failure is the same. Here is the log :
cat /var/log/Xorg.0.log.old
[ 20.830] (WW) Failed to open protocol names file lib/xorg/protocol.txt
[ 20.831]
X.Org X Server 1.20.9
X Protocol Version 11, Revision 0
[ 20.831] Build Operating System: Linux Arch Linux
[ 20.832] Current Operating System: Linux bucephale 5.7.0-3-ARCH #1 SMP Wed Jul 8 13:04:03 UTC 2020 aarch64
[ 20.832] Kernel command line: initrd=../initramfs-linux.img console=tty1 root=UUID=ed9bd825-64ff-445e-a16b-bfb7775acaae rw rootwait video=eDP-1:1920x1080@60 video=HDMI-A-1:1920x1080@60 bootsplash.bootfile=bootsplash-themes/manjaro/bootsplash
[ 20.832] Build Date: 26 August 2020 06:52:14AM
[ 20.832]
[ 20.832] Current version of pixman: 0.40.0
[ 20.833] Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
[ 20.833] Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 20.834] (==) Log file: "/var/log/Xorg.0.log", Time: Wed Aug 26 20:31:35 2020
[ 20.838] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[ 20.839] (==) No Layout section. Using the first Screen section.
[ 20.839] (==) No screen section available. Using defaults.
[ 20.839] (**) |-->Screen "Default Screen Section" (0)
[ 20.840] (**) | |-->Monitor "<default monitor>"
[ 20.841] (==) No monitor specified for screen "Default Screen Section".
Using a default monitor configuration.
[ 20.841] (==) Automatically adding devices
[ 20.841] (==) Automatically enabling devices
[ 20.841] (==) Automatically adding GPU devices
[ 20.841] (==) Automatically binding GPU devices
[ 20.841] (==) Max clients allowed: 256, resource mask: 0x1fffff
[ 20.844] (WW) The directory "/usr/share/fonts/misc" does not exist.
[ 20.844] Entry deleted from font path.
[ 20.847] (WW) The directory "/usr/share/fonts/OTF" does not exist.
[ 20.847] Entry deleted from font path.
[ 20.847] (WW) The directory "/usr/share/fonts/Type1" does not exist.
[ 20.847] Entry deleted from font path.
[ 20.847] (WW) The directory "/usr/share/fonts/100dpi" does not exist.
[ 20.847] Entry deleted from font path.
[ 20.847] (WW) The directory "/usr/share/fonts/75dpi" does not exist.
[ 20.847] Entry deleted from font path.
[ 20.847] (==) FontPath set to:
/usr/share/fonts/TTF
[ 20.847] (==) ModulePath set to "/usr/lib/xorg/modules"
[ 20.847] (II) The server relies on udev to provide the list of input devices.
If no devices become available, reconfigure udev or disable AutoAddDevices.
[ 20.848] (II) Module ABI versions:
[ 20.848] X.Org ANSI C Emulation: 0.4
[ 20.848] X.Org Video Driver: 24.1
[ 20.848] X.Org XInput driver : 24.1
[ 20.848] X.Org Server Extension : 10.0
[ 20.851] (++) using VT number 1
[ 20.851] (--) controlling tty is VT number 1, auto-enabling KeepTty
[ 20.859] (II) systemd-logind: took control of session /org/freedesktop/login1/session/_31
[ 20.862] (II) xfree86: Adding drm device (/dev/dri/card0)
[ 20.862] (II) Platform probe for /sys/devices/platform/display-subsystem/drm/card0
[ 20.865] (II) systemd-logind: got fd for /dev/dri/card0 226:0 fd 10 paused 0
[ 20.866] (II) xfree86: Adding drm device (/dev/dri/card1)
[ 20.866] (II) Platform probe for /sys/devices/platform/ff9a0000.gpu/drm/card1
[ 20.869] (II) systemd-logind: got fd for /dev/dri/card1 226:1 fd 11 paused 0
[ 20.870] (EE)
[ 20.870] (EE) Backtrace:
[ 20.871] (EE) 0: /usr/lib/Xorg (xorg_backtrace+0x5c) [0xaaaacf713f0c]
[ 20.871] (EE) 1: /usr/lib/Xorg (0xaaaacf5d3000+0x144428) [0xaaaacf717428]
[ 20.871] (EE) 2: linux-vdso.so.1 (__kernel_rt_sigreturn+0x0) [0xffffb2a5a578]
[ 20.871] (EE) 3: /usr/lib/libc.so.6 (strncmp+0x20) [0xffffb25d3104]
[ 20.872] (EE) 4: /usr/lib/Xorg (0xaaaacf5d3000+0x179d20) [0xaaaacf74cd20]
[ 20.872] (EE) 5: /usr/lib/Xorg (xf86BusProbe+0xc) [0xaaaacf72b3ac]
[ 20.872] (EE) 6: /usr/lib/Xorg (InitOutput+0x720) [0xaaaacf735e34]
[ 20.872] (EE) 7: /usr/lib/Xorg (0xaaaacf5d3000+0x77268) [0xaaaacf64a268]
[ 20.873] (EE) 8: /usr/lib/libc.so.6 (__libc_start_main+0xe8) [0xffffb2576538]
[ 20.873] (EE) 9: /usr/lib/Xorg (0xaaaacf5d3000+0x4024c) [0xaaaacf61324c]
[ 20.873] (EE)
[ 20.873] (EE) Segmentation fault at address 0x0
[ 20.873] (EE)
Fatal server error:
[ 20.873] (EE) Caught signal 11 (Segmentation fault). Server aborting
[ 20.873] (EE)
[ 20.873] (EE)
Please consult the The X.Org Foundation support
at http://wiki.x.org
for help.
[ 20.874] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[ 20.874] (EE)
Edit Septembre, 3rd, 2020 : 1.20.9-2 solves that issue. Thanks to whoever did that !