Hello,
after a du on monday (last has been 10 weeks before) the desktop manager (lightdm in my case) does not start automatically anymore. I reinstalled it, I even installed another one but none of this worked out. However if I start the dm amnually once I"m logged in as root it works out.
Looking into the Xorg logfile shows before the manual start of lighdm
[ 17.661] drmOpenByBusid: Searching for BusID pci:0000:01:00.0
[ 17.661] drmOpenDevice: node name is /dev/dri/card0 [ 17.661] drmOpenDevice: open result is 9, (OK)
[ 17.661] drmOpenByBusid: drmOpenMinor returns 9 [ 17.661] drmOpenByBusid: drmGetBusid reports pci:0000:01:00.0
[ 17.661] (EE) RADEON(0):
[dri] RADEONDRIGetVersion failed because of a version mismatch.
[dri] This chipset requires a kernel module version of 1.17.0,
[dri] but the kernel reports a version of 2.15.0.
[dri] Make sure your module is loaded prior to starting X, and
[dri] that this driver was built with support for KMS.
[dri] Aborting.
[ 17.661] (II) UnloadModule: "radeon"
[ 17.661] (II) UnloadSubModule: "int10"
[ 17.661] (II) Unloading int10 [ 17.662] (II) UnloadSubModule: "vgahw"
[ 17.662] (II) Unloading vgahw [ 17.662] (EE) Screen(s) found, but none have a usable configuration.
[ 17.662] Fatal server error:
[ 17.662] no screens found
Once I manually start the dm everything has been identified correctly.
Please tell me if you need further system infos.
Thanks
rasa
Edit by holgerw: Marked as solved