Resending my previous mail again, because I haven't sent it as
text/plain and it was rejected by the kernel mailing list. See below.
On Wed, Sep 27, 2023 at 3:43 PM Kamil Paral <kparal@xxxxxxxxxx> wrote:
>
> On Wed, Sep 27, 2023 at 7:16 AM Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx> wrote:
>>
>> I would also try to change all the BIOS settings back to defaults, see
>> that it works (it is probably in "user" security level then), then
>> switch back to "secure" (only change this one option) and try if it now
>> works. It could be that some setting just did not get commited properly.
>
>
> Hello, I have some interesting findings.
>
> I reset the BIOS ("load BIOS defaults"), however that doesn't reset the TB security level option - whatever is set is kept. So I can't really find out what the default value is and whether I changed it. However, to my surprise, the resume was suddenly fast even with the Secure Connect security level. So I went through options one by one and finally discovered that the "Wake by Thunderbolt 3" option makes the difference. It has the following description:
> "Enable/Disable Wake Feature with Thunderbolt 3 ports. If Enabled, the battery life during low power state may become shorter."
>
> It is enabled by default, I had it disabled before. When I enable it, I have a 5 sec resume even with Secure Connect TB security level. The dmesg for such a resume is here:
> https://bugzilla-attachments.redhat.com/attachment.cgi?id=1990815
>
> I'm sorry I haven't spotted and tested such an obviously named option earlier. My understanding was that this option either wakes up my laptop when I connect the cable (tested now, it doesn't appear to do so), or that it wakes it up when I move/click my dock-connected mouse (tested, doesn't appear to do so). So originally I wanted this disabled (and I had no kernel issues with it disabled, prior to e8b908146d44), but it seems I misunderstood what it does. And I'm still unsure what exactly it's supposed to do and why it should kill my battery life in the process, according to its description.
>
> Hopefully this helps to bring more light into this?
>
> However, I also discovered that even though Wake by TB3 + Secure Connect gives me a fast resume in a normal case, I still see a 60+ sec resume delay when I disconnect and then reconnect the TB cable while the laptop is suspended (which is a frequent use case for me). That doesn't happen with the User Authorization level (regardless of Wake by TB value). So I'm staying with User Authorization for the moment.
>
> Cheers,
> Kamil Páral
