Hi, Using linux-3.13.6, I observed the following output from the pppd kernel thread. This happened when I tried to suspend my computer and it *stops* the computer from suspending. Before going to suspend, I had used ppp to connect via my bluetooth modem and I later found that the connection was broken abruptly with a similar trace output. Trace: [22735.115313] PM: Syncing filesystems ... done. [22735.665613] PM: Preparing system for mem sleep [22735.665829] Freezing user space processes ... [22755.659538] Freezing of tasks failed after 20.004 seconds (1 tasks refusing to freeze, wq_ busy=0): [22755.659555] pppd D ffff8800376c9a58 0 16801 1 0x00000006 [22755.659557] ffff8800376c9750 0000000000000046 0000000000012e80 0000000000012e80 [22755.659560] ffff8802a1c1dfd8 ffff8800376c9750 0000000000000009 ffff8802a1c1dd78 [22755.659562] 0000000000000046 ffff8800376c9750 0000000000000028 ffff8800376c9750 [22755.659564] Call Trace: [22755.659569] [<ffffffff81048507>] ? do_exit+0x937/0xa50 [22755.659573] [<ffffffff814bb6e1>] ? oops_end+0x91/0xd0 [22755.659575] [<ffffffff814b1f4f>] ? no_context+0x1f3/0x1ff [22755.659577] [<ffffffff814bdb69>] ? __do_page_fault+0x89/0x500 [22755.659581] [<ffffffff811017dc>] ? free_pcppages_bulk+0x17c/0x3b0 [22755.659584] [<ffffffff81101cce>] ? free_hot_cold_page_list+0x3e/0x90 [22755.659586] [<ffffffff814babf8>] ? page_fault+0x28/0x30 [22755.659591] [<ffffffffa06fd5a3>] ? ppp_register_channel+0x13/0x20 [ppp_generic] [22755.659594] [<ffffffffa07062ab>] ? ppp_asynctty_open+0x12b/0x170 [ppp_async] [22755.659596] [<ffffffff812ec907>] ? tty_ldisc_open.isra.2+0x27/0x60 [22755.659598] [<ffffffff812ed1d3>] ? tty_ldisc_hangup+0x1e3/0x220 [22755.659601] [<ffffffff812e4614>] ? __tty_hangup+0x2c4/0x440 [22755.659603] [<ffffffff812e56a1>] ? disassociate_ctty+0x61/0x270 [22755.659605] [<ffffffff810483c2>] ? do_exit+0x7f2/0xa50 [22755.659607] [<ffffffff81053ad2>] ? recalc_sigpending+0x12/0x50 [22755.659609] [<ffffffff81054308>] ? __set_task_blocked+0x28/0x70 [22755.659611] [<ffffffff81048684>] ? do_group_exit+0x34/0xa0 [22755.659613] [<ffffffff810486fb>] ? SyS_exit_group+0xb/0x10 [22755.659615] [<ffffffff814c1eb9>] ? system_call_fastpath+0x16/0x1b [22755.659618] [22755.659619] Restarting tasks ... done. Regards, Sree -- To unsubscribe from this list: send the line "unsubscribe linux-ppp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
