I have had a similar issue with my T500 since upgrading to the same kernel release. I noticed in your boot dmesg the errors that I've been focusing on...
[ 4.531330] tpm_tis 00:0a: 1.2 TPM (device-id 0x1020, rev-id 6) [ 4.551294] tpm_tis 00:0a: tpm_transmit: tpm_send: error -5 [ 4.571865] tpm_tis 00:0a: tpm_transmit: tpm_send: error -5 [ 4.598088] tpm_tis 00:0a: tpm_transmit: tpm_send: error -5 To test if tpm_tis is the culprit you can unload the tpm_tis kernel module for the current session with: $ sudo modprobe -r tpm_tis After this I was able to suspend successfully from the session menu (icon looks like a power button in the upper right panel in the default gnome desktop UI). Here's a related post that suggests the source of the bug and recommends a solution: http://us.generation-nt.com/answer/2-6-36-2-regression-suspend-lenovo-x200s-broken-due-tpm-help-201488272.html -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/709827 Title: Suspend broke in 2.6.35-25 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
