Re: [coreboot] high-pitched whine on x60/t60
On https://wiki.archlinux.org/index.php/TLP: tp-smapi is needed for battery charge thresholds That would be something interesting to tweak - without tp-smapi, which is not supported at the moment On Tue, Jul 22, 2014 at 9:37 AM, The Gluglug i...@gluglug.org.uk wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 So far we have workarounds (idle=halt or processor.max_cstate=2 kernel parameter, or 'powertop --auto-tune'). I am fully aware that these are workarounds, not solutions. A libreboot user also reported that the following programme can be used (in the same way as powertop): https://wiki.archlinux.org/index.php/TLP Might be worth looking into. -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJTzmktAAoJEP9Ft0z50c+UhT8H/2xXUdcJANCmZkauI6iy5ZeO DGdPp5aDoDIDP5MOkju4dMQG4tziMkdiRUcA+ZwIDND4wB3s3rmt4Q+B/h2wyF9L hCXR2u5Zv5CjXntcoNbBxO7Lcl8zyc/f9o4o1JopKkO5e1W1TTCk0bDyegD7zqAy pLQXHOhFBhbtIFkfgi8XTUVqMy0+8umXn/NcHpRxrw9s85ntY372DIbYnoVq6Gz9 Pt1b9+VtQ+ERCaaJa7nZCsSuS3FYv594FRnDLkIJiSf5hViBOQqe7JIYNca4cvi6 5phTpYp0aSeRuyOWcKneiP5/wCGRB0OYzBGfxi8gMsz4Y2QtiGs3A2HqmUz3BIo= =t9yl -END PGP SIGNATURE- -- coreboot mailing list: coreboot@coreboot.org http://www.coreboot.org/mailman/listinfo/coreboot -- coreboot mailing list: coreboot@coreboot.org http://www.coreboot.org/mailman/listinfo/coreboot
Re: [coreboot] high-pitched whine on x60/t60
Hi folks, I haven't followed the previous discussion on this matter, so one question: Is this a coreboot issue? If this noise doesn't occur with the vendor firmware, has anybody checked if coreboot uses the same power management timing settings? (e.g. C4-TIMING_CNT, see [1], there might be more such settings not mentioned in the public datasheet) Regards, Nico [1] Intel I/O Controller Hub 7 (ICH7) Family Datasheet Document Number: 307013-003 -- coreboot mailing list: coreboot@coreboot.org http://www.coreboot.org/mailman/listinfo/coreboot
Re: [coreboot] high-pitched whine on x60/t60
Nico Huber wrote: Is this a coreboot issue? Partially. has anybody checked if coreboot uses the same power management timing settings? No, but I'm quite sure that it does not. //Peter -- coreboot mailing list: coreboot@coreboot.org http://www.coreboot.org/mailman/listinfo/coreboot
Re: [coreboot] high-pitched whine on x60/t60
These power supply issues are quite fun, like other things. The mistake would be to say that, because there is noise, coreboot is wrong and vendor firmware is right. It can be far more subtle than that. It could even be the case that coreboot is right, the vendor code is wrong, and the correction is eliciting noise because coreboot has revealed some other problem. I can't tell you how many times we've looked at, e.g., u-boot for some ARM, realized we had no idea why the code in question (vendor code) ever worked, and fixed it. And found some other issue, somewhere else, because of the fix. ron -- coreboot mailing list: coreboot@coreboot.org http://www.coreboot.org/mailman/listinfo/coreboot
Re: [coreboot] high-pitched whine on x60/t60
ron minnich wrote: wrong right It's way too early for that Ron. At this point nobody even understands wtf is causing the problem. Someone competent needs to research that before a discussion about the solution. //Peter -- coreboot mailing list: coreboot@coreboot.org http://www.coreboot.org/mailman/listinfo/coreboot
Re: [coreboot] high-pitched whine on x60/t60
On Tue, Jul 22, 2014 at 10:55 AM, Peter Stuge pe...@stuge.se wrote: ron minnich wrote: wrong right It's way too early for that Ron. At this point nobody even understands wtf is causing the problem. Someone competent needs to research that before a discussion about the solution. I'm not discussing a solution. Read my note. I'm saying that it's way to early to connect noise/lack of noise with coreboot being wrong or vendor firmware being right, as one writer said. These are not simple issues. ron -- coreboot mailing list: coreboot@coreboot.org http://www.coreboot.org/mailman/listinfo/coreboot
