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I have a Raspberry Pi running Raspbian. Towards the end of the startup log, I see this error. I believe it has been there a while, and I'm not sure what it may imply. 

kernel: bcm2708_fb soc:fb: Unknown ioctl 0x40187a22

It is included around the launch of lightdm. Here is the log section:

Nov 27 13:20:30 raspberrypi lightdm[619]: ** (lightdm:619): WARNING **: Error getting user list from org.freedesktop.Accounts: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedeskt
Nov 27 13:20:30 raspberrypi systemd[1]: Started Light Display Manager.
Nov 27 13:20:31 raspberrypi kernel: bcm2708_fb soc:fb: Unknown ioctl 0x40187a22
Nov 27 13:20:31 raspberrypi kernel: cfg80211: Calling CRDA to update world regulatory domain
Nov 27 13:20:32 raspberrypi lightdm[619]: ** (process:670): WARNING **: Error getting user list from org.freedesktop.Accounts: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedeskt
Nov 27 13:20:32 raspberrypi lightdm[670]: pam_unix(lightdm-autologin:session): session opened for user XX by (uid=0)

I should perhaps note that the default user pi doesn't exist anymore, why lightdm may be complaining about doing stuff for uid=0.

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  • Can you log in to a graphical session? After a reboot I no longer can, and "bcm2708_fb soc:fb: Unknown ioctl 0x40187a22" is the only error I see in logs. My pi has a destroyed i2c interface, but that did not prevent graphical login. And the default user pi is unchanged. – MKaama Jan 17 '16 at 5:34
  • @MKaama Yes, startx for Raspbian GUI OS works for me. I'm still not sure what this iotcl error designates. – PAN Jan 17 '16 at 9:35

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