-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 On Fri, Mar 23, 2018 at 10:55:54PM -0700, Elias Mårtenson wrote: > (tested on a Dell Latitude E7470) > > If I enable Intel Speedstep in the BIOS settings and boot the machine without > power plugged in, the CPU is incredibly slow (as in: It takes minutes to > start a VM). If I boot the computer with power plugged in, the machine is as > fast as I expect it to be. > > Disabling Speedstep makes this problem go away. I'm guessing this is caused > by the Speedstep drivers are not loaded in dom0, preventing the system from > increasing the CPU speed (which is set to the slowest possible when booting > on battery). > > There doesn't seem to be any packages that contain the Speedstep drivers. Is > there a way to get this to work?
I'm not sure how "Intel Speedstep" works, but regardless of this, Xen already do handle power management, including adjusting CPU frequency and C-states. There is also xenpm tool, you can use in dom0 to adjust Xen power management settings. - -- Best Regards, Marek Marczykowski-Górecki Invisible Things Lab A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEhrpukzGPukRmQqkK24/THMrX1ywFAlqtzPMACgkQ24/THMrX 1ywBmwf+KnoOewYXPUONF4BbkDqEdskYpFreFG7eYLUS5Wh+8bna/eFXNQHiIaGl 4s4tYHUZDzFs5kzjbkmSK0CY120Y9rg0edRXD0wFY/hndMCWV65C6UZaRz9ZEhfF D7BduofFVV/rEComWBiAuunJvUSze3W6832kccObjBfumZHb4qN3KZK2x6aU3OuG TwEPrBCZOPx69RKoGm3Fdg7/8AwKsT86pvVXOQ/RNJR0h3tN4PqkIXTZYF/GVlUn gi52ogaLanIaHltgn1mzbe1neFl1IJL4GpUTuH5BGsLUGmnQMO7NnQt9Y3gymbxt jEa01hRh2ZKEINHJiR5htgx+rN6v9Q== =HesT -----END PGP SIGNATURE----- -- You received this message because you are subscribed to the Google Groups "qubes-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-devel+unsubscr...@googlegroups.com. To post to this group, send email to qubes-devel@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-devel/20180324133328.GK8343%40mail-itl. For more options, visit https://groups.google.com/d/optout.
