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[Martin Blais <blais@xxxxxxxxx>]

I have had a similar problem, though I'm not sure it has to do with xorg.
I get kernel error messages in /var/log/messages every time this happens, something like this (not always the same stack trace):

Jun 30 05:47:41 tangerine kernel: [  608.220360] Pid: 7017, comm: pm-suspend Tainted: P           2.6.28-11-generic #42-Ubuntu
Jun 30 05:47:41 tangerine kernel: [  608.220361] Call Trace:
Jun 30 05:47:41 tangerine kernel: [  608.220364]  [<c0139ab0>] warn_slowpath+0x60/0x80
Jun 30 05:47:41 tangerine kernel: [  608.220367]  [<c01537fa>] ? down_trylock+0x2a/0x40
Jun 30 05:47:41 tangerine kernel: [  608.220369]  [<c013a10d>] ? try_acquire_console_sem+0xd/0x30
Jun 30 05:47:41 tangerine kernel: [  608.220373]  [<c02c7290>] ? kobject_put+0x20/0x50
Jun 30 05:47:41 tangerine kernel: [  608.220376]  [<c0500ac6>] ? printk+0x18/0x1a
Jun 30 05:47:41 tangerine kernel: [  608.220378]  [<c0164fd0>] suspend_test_finish+0x80/0x90
Jun 30 05:47:41 tangerine kernel: [  608.220380]  [<c01650a6>] suspend_devices_and_enter+0xc6/0x160
Jun 30 05:47:41 tangerine kernel: [  608.220382]  [<c0500ac6>] ? printk+0x18/0x1a
Jun 30 05:47:41 tangerine kernel: [  608.220384]  [<c0165329>] enter_state+0xc9/0x100
Jun 30 05:47:41 tangerine kernel: [  608.220386]  [<c01653dd>] state_store+0x7d/0xc0
Jun 30 05:47:41 tangerine kernel: [  608.220388]  [<c0165360>] ? state_store+0x0/0xc0
Jun 30 05:47:41 tangerine kernel: [  608.220390]  [<c02c7154>] kobj_attr_store+0x24/0x30
Jun 30 05:47:41 tangerine kernel: [  608.220393]  [<c020ab02>] sysfs_write_file+0x92/0xf0
Jun 30 05:47:41 tangerine kernel: [  608.220396]  [<c01bdab8>] vfs_write+0x98/0x110
Jun 30 05:47:41 tangerine kernel: [  608.220398]  [<c020aa70>] ? sysfs_write_file+0x0/0xf0
Jun 30 05:47:41 tangerine kernel: [  608.220399]  [<c01bdbed>] sys_write+0x3d/0x70
Jun 30 05:47:41 tangerine kernel: [  608.220402]  [<c0103f6b>] sysenter_do_call+0x12/0x2f
Jun 30 05:47:41 tangerine kernel: [  608.220403] ---[ end trace a50b6a42b0033182 ]---
Jun 30 05:47:41 tangerine kernel: [  608.220721] Restarting tasks ... done.
Jun 30 05:47:41 tangerine kernel: [  608.488524] usb 3-1: USB disconnect, address 4
Jun 30 05:47:41 tangerine kernel: [  608.728165] usb 3-1: new full speed USB device using uhci_hcd and address 5

-- 
Synaptic touchpad very slow after suspend/resume
https://bugs.launchpad.net/bugs/373690
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