On Sat, Jul 29, 2023 at 9:49 PM Karol Herbst <kher...@redhat.com> wrote: > > On Sat, Jul 29, 2023 at 7:54 PM Ferenc Wágner <wf...@niif.hu> wrote: > > > > Karol Herbst <kher...@redhat.com> writes: > > > > > On Fri, Jun 23, 2023 at 12:12 AM Ferenc Wágner <wf...@niif.hu> wrote: > > > > > >> Ferenc Wágner <wf...@niif.hu> writes: > > >> > > >>> Sorry if I'm reaching the wrong forum, please advise if so. My question > > >>> is not about the main focus of this community, but I had no better idea > > >>> about where to look for the relevant expertise. > > >>> > > >>> So: this Dell Precision 5560 laptop is built with a "T1200 Laptop GPU", > > >>> and I suspect it draws power even though I don't ever use it, heating > > >>> the computer and shortening battery life. Is there a way to shut it > > >>> down for good? (Or to make sure it isn't causing my problems?) > > >> > > >> Looks like I chose the wrong forum after all. Shall I try the linux-pm > > >> list instead, or can you recommend a more approriate one for the above > > >> question? > > > > > > The GPU should be getting powered down automatically as long as > > > nouveau is loaded and nothing actively uses the GPU. > > > > Thanks for the tip, Karol! Letting the nouveau module load doubled my > > estimated battery time. Online PC10 residency is still low, but that > > must be a different issue. > > yeah.. the Intel stuff from that time is a bit buggy and even plugging > in USB devices can disable PC10. You should probably try enabling > runtime power management on all pcie devices (write "auto" into all > /sys/bus/pci/devices/*/power/control files, each device also has a > "status" file to tell if they are suspended or not) And maybe same > with USB devices or something... There are also tools like tlp who > automate that stuff, but they usually set less optimal settings when > on power. > > Anyway, enabling runtime power management usually helps a bit here. >
I think there was also some sata/nvme stuff to toggle, but can't remember the details here. Might want to search for that. > > -- > > Thanks again, > > Feri. > >
