Hello,
for the reason my usb_modeswitch did not work anymore on my samsung nc10, I decided today to upgrade to 5.2 (from 4.7).
At boot, during the load of the tczs, 2 similar errors appear
"umount: cant umount /tmp/tcloop/Xorg-7.7-lib:operation not permitted" and later
"umount.. .. Xorg-7.7: operation not permitted"
And xorg is not working. My xorg.conf should be perhaps deleted from the backup?
Is something special to be done for the upgrade from xorg7.6 to 7.7 ?