Fwd: Intel 7560 LTE Modem stops working after resuming from standby

Fwd: Intel 7560 LTE Modem stops working after resuming from standby

[Bagas Sanjaya]

Hi,

I notice a regression report on Bugzilla [1]. Quoting from it:

> I noticed a few days ago, after Fedora moved to Kernel 6.5, that my Intel LTE Modem was not working anymore after resuming from standby. 
> 
> The journal listed this error message multiple times:
> kernel: iosm 0000:01:00.0: msg timeout
> 
> It took me a while to determine the root cause of the problem, since the modem did not work either in the following warm reboots. 
> Only a shutdown revived the modem.
> 
> I did a bisection of the error and I was able to find the culprit:
> 
> [e4f5073d53be6cec0c654fac98372047efb66947] net: wwan: iosm: enable runtime pm support for 7560

See Bugzilla for the full thread.

Anyway, I'm adding this regression to regzbot:

#regzbot introduced: e4f5073d53be6c https://bugzilla.kernel.org/show_bug.cgi?id=217996
#regzbot title: pm support for Intel 7560 makes the modem stops working after resume

Thanks.

[1]: https://bugzilla.kernel.org/show_bug.cgi?id=217996

-- 
An old man doll... just what I always wanted! - Clara

Re: Intel 7560 LTE Modem stops working after resuming from standby

[Loic Poulain]

Hi Chetan,

On Thu, 12 Oct 2023 at 11:52, Bagas Sanjaya <bagasdotme@gmail.com> wrote:
> I notice a regression report on Bugzilla [1]. Quoting from it:
>
> > I noticed a few days ago, after Fedora moved to Kernel 6.5, that my Intel LTE Modem was not working anymore after resuming from standby.
> >
> > The journal listed this error message multiple times:
> > kernel: iosm 0000:01:00.0: msg timeout
> >
> > It took me a while to determine the root cause of the problem, since the modem did not work either in the following warm reboots.
> > Only a shutdown revived the modem.
> >
> > I did a bisection of the error and I was able to find the culprit:
> >
> > [e4f5073d53be6cec0c654fac98372047efb66947] net: wwan: iosm: enable runtime pm support for 7560

Any quick fix for this issue? alternatively we will probably revert e4f5073d53.

Regards,
Loic

Re: Intel 7560 LTE Modem stops working after resuming from standby

[Bagas Sanjaya]

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On Thu, Oct 12, 2023 at 06:54:11PM +0200, Loic Poulain wrote:
> Hi Chetan,
> 
> On Thu, 12 Oct 2023 at 11:52, Bagas Sanjaya <bagasdotme@gmail.com> wrote:
> > I notice a regression report on Bugzilla [1]. Quoting from it:
> >
> > > I noticed a few days ago, after Fedora moved to Kernel 6.5, that my Intel LTE Modem was not working anymore after resuming from standby.
> > >
> > > The journal listed this error message multiple times:
> > > kernel: iosm 0000:01:00.0: msg timeout
> > >
> > > It took me a while to determine the root cause of the problem, since the modem did not work either in the following warm reboots.
> > > Only a shutdown revived the modem.
> > >
> > > I did a bisection of the error and I was able to find the culprit:
> > >
> > > [e4f5073d53be6cec0c654fac98372047efb66947] net: wwan: iosm: enable runtime pm support for 7560
> 
> Any quick fix for this issue? alternatively we will probably revert e4f5073d53.

Chetan can't be contacted as sending to his address bounces (error 550)
(had he left Intel?). Last message on LKML is this culprit patch [1].
Hence, revert for now.

Thanks.

[1]: https://lore.kernel.org/all/1b0829943267c30de27f271666cb7ce897f5b54a.1686218573.git.m.chetan.kumar@linux.intel.com/

-- 
An old man doll... just what I always wanted! - Clara

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Re: Intel 7560 LTE Modem stops working after resuming from standby

[Loic Poulain]

Hi Bagas,

On Fri, 13 Oct 2023 at 02:04, Bagas Sanjaya <bagasdotme@gmail.com> wrote:
>
> On Thu, Oct 12, 2023 at 06:54:11PM +0200, Loic Poulain wrote:
> > Hi Chetan,
> >
> > On Thu, 12 Oct 2023 at 11:52, Bagas Sanjaya <bagasdotme@gmail.com> wrote:
> > > I notice a regression report on Bugzilla [1]. Quoting from it:
> > >
> > > > I noticed a few days ago, after Fedora moved to Kernel 6.5, that my Intel LTE Modem was not working anymore after resuming from standby.
> > > >
> > > > The journal listed this error message multiple times:
> > > > kernel: iosm 0000:01:00.0: msg timeout
> > > >
> > > > It took me a while to determine the root cause of the problem, since the modem did not work either in the following warm reboots.
> > > > Only a shutdown revived the modem.
> > > >
> > > > I did a bisection of the error and I was able to find the culprit:
> > > >
> > > > [e4f5073d53be6cec0c654fac98372047efb66947] net: wwan: iosm: enable runtime pm support for 7560
> >
> > Any quick fix for this issue? alternatively we will probably revert e4f5073d53.
>
> Chetan can't be contacted as sending to his address bounces (error 550)
> (had he left Intel?). Last message on LKML is this culprit patch [1].
> Hence, revert for now.

Could you please submit the revert fix?

Regards,
Loic

Re: Intel 7560 LTE Modem stops working after resuming from standby

[Bagas Sanjaya]

On 16/10/2023 20:18, Loic Poulain wrote:
> Hi Bagas,
> 
> On Fri, 13 Oct 2023 at 02:04, Bagas Sanjaya <bagasdotme@gmail.com> wrote:
>>
>> On Thu, Oct 12, 2023 at 06:54:11PM +0200, Loic Poulain wrote:
>>> Hi Chetan,
>>>
>>> On Thu, 12 Oct 2023 at 11:52, Bagas Sanjaya <bagasdotme@gmail.com> wrote:
>>>> I notice a regression report on Bugzilla [1]. Quoting from it:
>>>>
>>>>> I noticed a few days ago, after Fedora moved to Kernel 6.5, that my Intel LTE Modem was not working anymore after resuming from standby.
>>>>>
>>>>> The journal listed this error message multiple times:
>>>>> kernel: iosm 0000:01:00.0: msg timeout
>>>>>
>>>>> It took me a while to determine the root cause of the problem, since the modem did not work either in the following warm reboots.
>>>>> Only a shutdown revived the modem.
>>>>>
>>>>> I did a bisection of the error and I was able to find the culprit:
>>>>>
>>>>> [e4f5073d53be6cec0c654fac98372047efb66947] net: wwan: iosm: enable runtime pm support for 7560
>>>
>>> Any quick fix for this issue? alternatively we will probably revert e4f5073d53.
>>
>> Chetan can't be contacted as sending to his address bounces (error 550)
>> (had he left Intel?). Last message on LKML is this culprit patch [1].
>> Hence, revert for now.
> 
> Could you please submit the revert fix?
> 

OK, will do.

-- 
An old man doll... just what I always wanted! - Clara

Re: Fwd: Intel 7560 LTE Modem stops working after resuming from standby

[Bagas Sanjaya]

On 12/10/2023 16:52, Bagas Sanjaya wrote:
> Hi,
> 
> I notice a regression report on Bugzilla [1]. Quoting from it:
> 
>> I noticed a few days ago, after Fedora moved to Kernel 6.5, that my Intel LTE Modem was not working anymore after resuming from standby. 
>>
>> The journal listed this error message multiple times:
>> kernel: iosm 0000:01:00.0: msg timeout
>>
>> It took me a while to determine the root cause of the problem, since the modem did not work either in the following warm reboots. 
>> Only a shutdown revived the modem.
>>
>> I did a bisection of the error and I was able to find the culprit:
>>
>> [e4f5073d53be6cec0c654fac98372047efb66947] net: wwan: iosm: enable runtime pm support for 7560
> 
> See Bugzilla for the full thread.
> 
> Anyway, I'm adding this regression to regzbot:
> 
> #regzbot introduced: e4f5073d53be6c https://bugzilla.kernel.org/show_bug.cgi?id=217996
> #regzbot title: pm support for Intel 7560 makes the modem stops working after resume
> 

FYI, the reporter had uploaded full dmesg output on Bugzilla.
Also, he noted shutdown abnormality:

> also I should mention, that if this error occurs, I am unable to shutdown my system anymore. "poweroff" does not turn the laptop off, it simply triggers a reboot, where the modem is still not functional. Only pressing the powerbutton >4 secs "resets" the device.

Thanks.

-- 
An old man doll... just what I always wanted! - Clara