Comment 12 for bug 395819

Still the same on Ubuntu 11.04. Any progress would be greatly appreciated. Some output of dmesg after turning on pm_trace (echo 1 > /sys/power/pm-trace):

[ 1168.500933] PM: Syncing filesystems ... done.
[ 1168.503670] PM: Preparing system for mem sleep
[ 1168.715991] Freezing user space processes ...
[ 1188.725230] Freezing of tasks failed after 20.01 seconds (1 tasks refusing to freeze, wq_busy=0):
[ 1188.725274] gnome-do D c10665ab 0 1699 1467 0x00800004
[ 1188.725278] efea1d9c 00200086 efea1d2c c10665ab f74c8000 efea1d2c ed039bcc c1879680
[ 1188.725282] 948dec8c 0000010f ed039bc8 c1879680 c1879680 f7807680 ed039940 c1766f60
[ 1188.725285] edf64a64 efea1d74 fa84d6a3 edf64800 f6d14004 efea1d88 fa84b52d 00200246
[ 1188.725288] Call Trace:
[ 1188.725294] [<c10665ab>] ? lock_timer_base.clone.21+0x2b/0x50
[ 1188.725303] [<fa84d6a3>] ? __rpc_sleep_on+0x93/0x110 [sunrpc]
[ 1188.725309] [<fa84b52d>] ? xs_tcp_send_request+0x4d/0x140 [sunrpc]
[ 1188.725312] [<c10359b8>] ? default_spin_lock_flags+0x8/0x10
[ 1188.725315] [<c15325ef>] ? _raw_spin_lock_irqsave+0x2f/0x50
[ 1188.725321] [<fa84ce9e>] rpc_wait_bit_killable+0x1e/0x40 [sunrpc]
[ 1188.725323] [<c1530ecd>] __wait_on_bit+0x4d/0x70
[ 1188.725327] [<fa84ce80>] ? rpc_wait_bit_killable+0x0/0x40 [sunrpc]
[ 1188.725332] [<fa84ce80>] ? rpc_wait_bit_killable+0x0/0x40 [sunrpc]
[ 1188.725334] [<c1530f51>] out_of_line_wait_on_bit+0x61/0x70
[ 1188.725337] [<c1076e20>] ? wake_bit_function+0x0/0x60
[ 1188.725341] [<fa84d515>] __rpc_execute+0xd5/0x1b0 [sunrpc]
[ 1188.725346] [<fa84d9e8>] rpc_execute+0x38/0x40 [sunrpc]
[ 1188.725350] [<fa847314>] rpc_run_task+0xa4/0xe0 [sunrpc]
[ 1188.725355] [<fa84744c>] rpc_call_sync+0x3c/0x60 [sunrpc]
[ 1188.725362] [<fb0f8c67>] nfs3_rpc_wrapper.clone.7+0x37/0x60 [nfs]
[ 1188.725367] [<fb0f9c9d>] nfs3_proc_getattr+0x3d/0x80 [nfs]
[ 1188.725372] [<fb0ea269>] __nfs_revalidate_inode+0xa9/0x200 [nfs]
[ 1188.725375] [<c113efda>] ? user_path_at+0x4a/0x80
[ 1188.725380] [<fb0ea50f>] nfs_revalidate_inode+0x2f/0x50 [nfs]
[ 1188.725384] [<fb0ea5d6>] nfs_getattr+0x56/0x110 [nfs]
[ 1188.725387] [<c1136a32>] vfs_getattr+0x42/0x70
[ 1188.725391] [<fb0ea580>] ? nfs_getattr+0x0/0x110 [nfs]
[ 1188.725393] [<c1136acd>] vfs_fstatat+0x6d/0x90
[ 1188.725395] [<c1136b40>] vfs_stat+0x20/0x30
[ 1188.725397] [<c1136eb6>] sys_stat64+0x16/0x30
[ 1188.725399] [<c1133ccd>] ? fput+0x1d/0x30
[ 1188.725401] [<c1130a0e>] ? filp_close+0x4e/0x70
[ 1188.725403] [<c105e29e>] ? sys_time+0x1e/0x60
[ 1188.725405] [<c100ab5f>] sysenter_do_call+0x12/0x28