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    SubjectRe: [linux-usb-devel] 2.6.20-rc5: BUG: lock held at task exit time! (pm_mutex){--..}, at: [<c013bfff>] enter_state+0x3f/0x170
    Date
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    On Tuesday 16 January 2007 23:31, Alan Stern wrote:
    > On Tue, 16 Jan 2007, Andrey Borzenkov wrote:
    > > I have Toshiba Portege 4000 that almost always hangs dead resuming from
    > > STR. This was better before 2.6.18, since then STR is unusable. Sometimes
    > > it manages to resume; yesterday I got on console and in dmesg:
    > >
    > > =====================================
    > > [ BUG: lock held at task exit time! ]
    > > - -------------------------------------
    > > echo/28793 is exiting with locks still held!
    > > 1 lock held by echo/28793:
    > > #0: (pm_mutex){--..}, at: [<c013bfff>] enter_state+0x3f/0x170
    > >
    > > stack backtrace:
    > > [<c0103fea>] show_trace_log_lvl+0x1a/0x30
    > > [<c01045f2>] show_trace+0x12/0x20
    > > [<c01046a6>] dump_stack+0x16/0x20
    > > [<c0132377>] debug_check_no_locks_held+0x87/0x90
    > > [<c011c8bb>] do_exit+0x4db/0x820
    > > [<c011cc29>] do_group_exit+0x29/0x70
    > > [<c011cc7f>] sys_exit_group+0xf/0x20
    > > [<c010300e>] sysenter_past_esp+0x5f/0x99
    > > =======================
    >
    > Have you tried using 2.6.19? There was a bug which got fixed in that
    > release.
    >

    Yes I did. It had the same problem.

    Sorry for posting to wrong list, but I hit USB pm_mutex before other one.

    - -andrey
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