On Tue, Jan 31, 2017 at 1:47 PM, Ritesh Raj Sarraf <rrs@xxxxxxxxxx> wrote: > Hello Andy, > > On Mon, 2017-01-30 at 22:25 +0200, Andy Shevchenko wrote: >> On Mon, Jan 30, 2017 at 12:57 PM, Ritesh Raj Sarraf <rrs@xxxxxxxxxx> wrote: >> > Lenovo Yoga (many variants: Yoga, Yoga2 Pro, Yoga2 13, Yoga3 Pro, Yoga 3 >> > 14 etc) has multiple modles that are a hybrid laptop, working in laptop >> > mode as well as tablet mode. >> >> The main question is who is the initiator of the mode change? Do you >> need to do anything in UI to prepare OS for such switch? >> > > The human user is the only initiator. The hardware has 360 degree rotation. > There is nothing special needed in the UI, or the OS, to get into tablet mode. > Just flip the hardware 360 degree into tablet mode. > > More details on the hardware series can be found at: > http://shop.lenovo.com/us/en/laptops/lenovo/yoga-laptop-series/yoga-laptop-2-13/ We have Yoga 900 here and I just played with it. So, can you do the following: 1. Boot system to a text mode (no X). 2. Be sure that ideapad_lenovo module is loaded 3. By looking into output of % ls -l /sys/class/input find VPC2004 related *event* number (/.../eventX/...) 4. Run % od -x /dev/input/eventX 5. Ensure that you get events (hex dump) when you bend the cover. We can continue after you try the above. > Sorry about that. I am no kernel developer, just wanting to fix my hardware. > > I looked into the doc. The documentation mentions the sysfs path: > '/sys/devices/platform/ideapad/fan_mode', which is what we would also want to > use. > > But the driver only shows the interface through: > '/sys/devices/platform/devices/VPC2004:00/' > > Is this an expected behavior ? Driver is old, perhaps it's not fixed part, perhaps it's by design. > Please find attached revised patch along with write support and ABI > Documentation changes. Next time please avoid attachments here. -- With Best Regards, Andy Shevchenko
