Workaround for Lexmark x2650 not working in Ubuntu:
sudo aa-complain cupsd
Without it, AppArmor will stop the third party cupsd driver (lxm08) to work properly:
Excerpt from /var/log/syslog :
... Sep 3 13:53:05 adevaraciune kernel: [ 2646.795015] type=1400 audit(1315047185.373:121): apparmor="DENIED" operation="exec" parent=1208 profile="/usr/sbin/cupsd" name="/usr/local/lexmark/lxk08/bin/printdriver" pid=5107 comm="cupsd" requested_mask="x" denied_mask="x" fsuid=7 ouid=0 Sep 3 13:53:05 adevaraciune kernel: [ 2646.795465] type=1400 audit(1315047185.373:122): apparmor="DENIED" operation="exec" parent=1208 profile="/usr/sbin/cupsd" name="/usr/local/lexmark/lxk08/bin/lxkusb" pid=5108 comm="cupsd" requested_mask="x" denied_mask="x" fsuid=7 ouid=0 ....
I don’t really like where Ubuntu is heading. The most stable version seemed version 9 with broken pulse audio. Updating to 10 did not fix pulseaudio and printer issues appeared. Ubuntu 11.04 does not fix pulseaudio, does not fix printer, and breaks the UI since now you have to wait one second more for the “dock bar” to appear before doing task switching …
I’m sure there’s someone out there working on its distro thinking “this should not be like Ubuntu”…
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