Arch Linux

Description:

Updates to packages xorg-server and nvidia published after 16/02/2017 cause loading of wrong GLX module when starting X server. This was detected when trying to start kodi-standalone service at boot by means of systemd kodi.service file provided by kodi-standalone-service.

By using ALA to restore system package versions available on 16/02/2017, correct functionality was restored. By selectively upgrading packages to current versions, problems were traced to upgrading of xorg-server & xorg-server-common:

At 16/02/2017, package versions were (appropriate kernel version is required for the nvidia module):
xorg-server 1.19-2
xorg-server-common 1.19-2
nvidia 375.26-2
nvidia-utils 375.26-6
nvidia-libgl 375.26-6
linux 4.9.8-1
linux-headers 4.9.8-1

By upgrading nvidia packages to version 1.19-5 (which requires kernel 4.9.11-1) , and/or xorg-server to version 378.13-2, X server gets broken, by loading the wrong GLX module.

First sign of trouble can be detected close to the start of the Xorg.0.log file:

[ 31.070] (II) systemd-logind: got fd for /dev/dri/card0 226:0 fd 11 paused 1
[ 31.070] (EE) Error systemd-logind returned paused fd for drm node

After that, it can be seen that the nvidia config file "nvidia-drm-outputclass.conf" is ignored, and ModulePath is not correctly set to load the nvidia module. Instead, default GLX module libglx.so in /usr/lib/xorg/modules/extensions/, provided by xorg, is loaded. As this file is not appropriate for the nvidia card, more errors can be seen in the Xorg.0.log:

[ 31.351] (EE) NVIDIA(0): Failed to initialize the GLX module; please check in your X
[ 31.351] (EE) NVIDIA(0): log file that the GLX module has been loaded in your X
[ 31.351] (EE) NVIDIA(0): server, and that the module is the NVIDIA GLX module. If
[ 31.351] (EE) NVIDIA(0): you continue to encounter problems, Please try
[ 31.351] (EE) NVIDIA(0): reinstalling the NVIDIA driver.

And soon after,

[ 32.280] (II) AIGLX: Screen 0 is not DRI2 capable
[ 32.280] (EE) AIGLX: reverting to software rendering
[ 32.544] (EE) AIGLX error: dlopen of /usr/lib/xorg/modules/dri/swrast_dri.so failed (/usr/lib/xorg/modules/dri/swrast_dri.so: undefined symbol: _glapi_tls_Dispatch)
[ 32.544] (EE) GLX: could not load software renderer
[ 32.544] (II) GLX: no usable GL providers found for screen 0

all of which results in a black screen, and kodi generating a crashlog file each few seconds.

As soon as mentioned packages are downgraded to 16/02 versions, problems disappears and kodi-standalone starts normally.

Some more information available in forum thread https://bbs.archlinux.org/viewtopic.php?pid=1693540.