It appears this a result of hyperthreading being enabled, see conversation in https://github.com/QubesOS/qubes-issues/issues/5210
On Friday, July 26, 2019 at 10:15:31 PM UTC-7, [email protected] wrote: > > Ok, this wasn't expected but I actually see similar behavior on my T470 - > power consumption is roughly 2X on the T470 after suspend/resume, and 3-4x > on the T490. Can someone else try measuring power consumption before and > after the first suspend/resume cycle and report back? I have a feeling this > could be impacting more people. > > On Friday, July 26, 2019 at 5:36:58 PM UTC-7, Andrew Sorensen wrote: >> >> I didn't see any reports of Qubes on the T490, so I figured I'd start >> one: I just got a T490 (i7 model with 32GB of ram), and was able to get >> Qubes 4.0.2rc1 installed and usable (after excluding the network card from >> FLR). For the most part, it appears it will be as usable as Qubes on my >> T470 with one problem: power consumption. On a cold boot, everything seems >> acceptable and I get a good number of hours of battery life, however after >> suspending the laptop and resuming, power consumption spikes from 4W to >> 15W+, reducing battery life down to a few hours and keeping the fan pegged. >> >> I've tried upgrading to kernel-latest (e.g. 5.x) and using >> tlp/powertop/xenpm to troubleshoot further, but nothing stuck out. I also >> downloaded Fedora 30 and was able to suspend and resume without seeing the >> additional power increase. My understanding is that power management is >> handled by Xen, and not Dom0 so I think I'm pretty much out of options, but >> figured I'd drop a note in case anyone else runs into this. I don't plan to >> investigate much further since I also have the T470, but look forward to >> trying again when Qubes 4.1 is available in some form. >> >> Also - if someone else wants to test/play around - make sure to use the >> latest qubes release. I first tried with the version I used to setup my >> T470 since I didn't have a lot of time, but there were graphical issues >> (*very* slow painting of the installer/desktop UI), and wireless and wired >> networking were unavailable. >> > -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/5b5d11d5-0db8-426c-89d0-4b8f30ca4136%40googlegroups.com.
