linux-kernel - Re: Linux 3.1-rc9

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Date:	Mon, 10 Oct 2011 13:23:18 -0300
From:	Rajiv Andrade <srajiv@...ux.vnet.ibm.com>
To:	Stefan Berger <stefanb@...ux.vnet.ibm.com>
CC:	Arkadiusz Miśkiewicz <a.miskiewicz@...il.com>,
	linux-kernel@...r.kernel.org, tpmdd-devel@...ts.sourceforge.net,
	Debora Velarde <debora@...ux.vnet.ibm.com>,
	Marcel Selhorst <m.selhorst@...rix.com>
Subject: Re: Linux 3.1-rc9

On 09/10/11 23:29, Stefan Berger wrote:
> On 10/09/2011 04:51 PM, Arkadiusz Miśkiewicz 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?

[1] - http://marc.info/?l=linux-kernel&m=131824905826280&w=2
[2] - github.com/srajiv/tpm.git for-james

Thanks,
Rajiv

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