Re: Linux 3.1-rc9

[Stefan Berger]

On 10/10/2011 01:05 PM, Arkadiusz MiÅkiewicz wrote:
> On Monday 10 of October 2011, Rajiv Andrade wrote:
> > On 09/10/11 23:29, Stefan Berger wrote:
> > > On 10/09/2011 04:51 PM, Arkadiusz MiÅkiewicz wrote:
> > > > On Wednesday 05 of October 2011, Linus Torvalds wrote:
> > > > > Another week, another -rc.
> > > > suspend to ram regression is annoying (still visible on rc9;
> > > > https://lkml.org/lkml/2011/9/24/76) but unfortunately maintainers are
> > > > silent.
> > > I tried -rc9 on my Lenovo W500 with that same TPM. I cannot reproduce
> > > the 'scheduling while atomic' problem you had reported earlier. I also
> > > could suspend / resume fine as long as I did the following:
> > >
> > > - suspended with the tpm_tis driver as module in the kernel
> > > - once a suspend was done without the tpm_tis driver the subsequent
> > > suspends were all done without the tpm_tis driver
> > >
> > > Once I had done a suspend/resume with the tpm_tis driver *not* in the
> > > kernel and then again a suspend with the tpm_tis driver in the kernel,
> > > it did not resume anymore. I believe previously (previous version of
> > > kernel and/or Fedora) it refused to even suspend. The reason why this
> > > doesn't work properly is that the driver has to send a command to the
> > > TPM upon suspend and the BIOS then sends the corresponding wakeup
> > > command.
> > >
> > > Did you maybe previously suspend/resume without a tpm_tis driver and
> > > then try to suspend with it ?
> > >
> > > Also, my Lenovo W500 shows particularly odd behavior when I switch
> > > from Windows to Linux. The first suspend with a Linux booted after
> > > Windows (with or without tpm_tis driver) does *not* resume (reboot
> > > required). A subsequently rebooted Linux makes the suspend/resume work
> > > fine.
> > >
> > >     Stefan
> > Arkadiusz,
> >
> > Do you still see the issue with this patch [1][2] applied?
> The issue doesn't happen with this patch but error condition with "Could not
> read PCR 0. TPM is not working correctly." is triggered immediately at boot,
> even before suspend is used.
>
> $ dmesg|grep -iE "(tpm|suspend)"
> [   12.640039] tpm_tis 00:0a: 1.2 TPM (device-id 0x1020, rev-id 6)
> [   12.640048] tpm_tis 00:0a: Intel iTPM workaround enabled
> [   12.768057] tpm_tis 00:0a: Could not read PCR 0. TPM is not working
> correctly.
> [   12.768066] tpm_tis 00:0a: Was machine previously suspended without TPM
> driver present?
> [   88.512117] Suspending console(s) (use no_console_suspend to debug)
Though I suppose that now your suspend/resume cycles always work?
I guess the BIOS seems not to be initializing the TPM correctly. Any 
chance you can get a hold of a BIOS update for your machine?

   Stefan

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