The attached 20_wwan script placed in /etc/pm/sleep.d/ does seem to decrease the likeliness of the error to happen. I had a run of 102 suspend/resume cycles (timer got unwritable), a run of 74 cycles (gdm was shown instead of desktop) and a run of 150 cycles (modem disappeared and could not get back with rfkill). From my point of view, disabling the device with rfkill before the suspend and unblocking it during resume seems to improve the situation, albeit it does not solve it completely.
I will now test the new kernel provided by Kamal. ** Attachment added: "20_wwan" https://bugs.edge.launchpad.net/ubuntu/+source/linux/+bug/614274/+attachment/1533857/+files/20_wwan -- modem-manager fails to recognize 3G modem after suspend/resume https://bugs.launchpad.net/bugs/614274 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs