Hi Vitaly and Peter > From: Peter Robinson <pbrobinson@xxxxxxxxx> > Sent: Friday, May 1, 2020 6:53 AM > > > > Hello, Mark. > > > > When Lenovo will fix major throttling issues[1] on all supported > > ThinkPad models? > > > > When running on GNU/Linux, due to overheating, my T480/T580 throttle up > > to 400 MHz (much more slower, than Pentium III from 1999). > > I bet this is actually the Intel Dynamic Platform and Thermal > Framework (DPTF) that's at fault here [1] and so while I'm sure Lenovo > can approach Intel and assist I'm not sure it's something they can fix > directly, on the plus side it looks like it's being reverse engineered > in general. > > https://mjg59.dreamwidth.org/54923.html > > > We are waiting the fix for more than one year and this is not good. > > Original thread on Lenovo forum: [2]. > > > > [1]: https://bugzilla.redhat.com/show_bug.cgi?id=1598615 > > [2]: > > https://forums.lenovo.com/t5/Other-Linux-Discussions/X1C6-T480s-low- > cTDP-and-trip-temperature-in-Linux/m-p/4028489 > > The thermal throttling issue is definitely another big pain point. Here I'm really tied in what I can and can't say - I need permission from the thermal team to share full details and they haven't given that yet. But there is work still ongoing so I'll try and give you what little I can. As an aside - I know that forum thread well, and I completely get the frustration for users. I should add - all our 2020 Linux support platforms will have the thermal firmware solution implemented - Yes, it's all tied in to DPTF and I personally (Lenovo hat off) think what Matthew is doing is really cool. I've been supporting the exercise where I can to make sure that solution works well on Lenovo platforms (you can check the merge request thread and issues on his fork as proof 😉). I'm hoping he gets it figured for the good of the community. I think it's a real shame Intel aren't giving open source support for DPTF - The thermal team spent a long time trying to find a solution that didn't involve new FW. From our point of view it's actually quite a complicated and expensive thing to do and there are some technical limitations that mean it isn't back-portable to all platforms. One big frustration I have is that some platforms are getting the fix - really quite soon - and others aren't and I've not been allowed to share which it is. There are technical reasons for this - it's not just us being difficult. I think Lenovo's thermal firmware implementation is actually pretty cool and a very nice solution and it should have been a really good story on how we had this Linux related issue and provided a solution for our customers and instead it's turned into a big source of frustration for people. We need to improve how we communicate on issues like this but communicating in an open source way doesn't come naturally to everyone yet... Obviously as a T480 user the above is useless....I do expect to be able to share the details of which platforms are in and out in the next month (I really hope!) Genuinely sorry I can't do it earlier (or 6 months ago). Mark _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx
