Re: [tpmdd-devel] Linux 3.1-rc9

[Stefan Berger <stefanb@linux.vnet.ibm.com>]

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