Same laptop (w530): Driver: nvidia binary With dGPU active: f8 With dGPU inactive: 70
Method for switching: bbswitch Newer versions of ubuntu try to do the prime-select switching in a different way (i.e. not bbswitch) when the nvidia driver is in use. This new method doesn't work on these laptops. The old bbswitch method does work reliably. Also, nouveau is able to reliably turn the dgpu on and off. Ubuntu bug report: https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1778011 On Fri, Apr 5, 2019 at 3:13 PM Zaolin <[email protected]> wrote: > Sup, > > -> f8 on my Thinkpad W530 > > On 05.04.19 20:21, Patrick Rudolph wrote: > > Hi folks, > > In order to add Nvidia Optimus support on Lenovo laptops, I'm trying > > to fix the last issues on [1], but I need your help to do some test on > > Lenovo's firmware. > > On Lenovo Sandy Bridge / Ivy Bridge series the PMH7 register 0x50 > > controls dGPU power. > > Comments on Gerrit show that different bits on different generations > > are used. > > > > Please use util/pmh7tool on vendor firmware with Optimus enabled and > > graphics driver loaded: > > > > $ ./pmh7tool -r 0x50 > > > > To wake the GPU from sleep, you can simply run lspci, or a graphical > > 3D application. > > It will go back to sleep after a few seconds of idle. > > > > Please report which bits toggle and the device you run tests on. > > It will help to add proper Nvidia Optimus support to all Lenovo laptops. > > > > > > 1: https://review.coreboot.org/#/c/coreboot/+/28380/ > > > > Regards, > > Patrick > > _______________________________________________ > > coreboot mailing list -- [email protected] > > To unsubscribe send an email to [email protected] > > _______________________________________________ > coreboot mailing list -- [email protected] > To unsubscribe send an email to [email protected] >
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