Hi Jonathan Am 17.06.2016 um 01:46 schrieb Jonathan Woithe: > On Tue, Jun 14, 2016 at 10:48:32AM +0200, Jan-Marek Glogowski wrote: >> I recently got new Skylake hardware (e7x6) from Fujitsu. Compared to >> previous Haswell generation (e7x4), some of the Fn+X key combination >> stopped working. This includes the brightness and "touchpad dis-/enable" >> key combinations. >> >> For the brightness control it's understandable, as this was handled by a >> ACPI device FUJ02B1, which is no longer available. > > I see. Perhaps they've rolled this functionality into FUJ02E3 (which > previously has handled everything except brightness control). > >> I don't know how the touchpad disable key was actually working, as I don't >> get any scan codes or ACPI events in userspace - probably I'm missing >> something here. > > Maybe on the previous hardware generation the touchpad keys were controlled > solely in hardware, and for some reason they've moved them to software in > the latest generation. Just to make this clear. It's not "touchpad keys" but the "Fn + F4", which should toggle the touchpad functionality (is broken on Windows too). >> I compiled the git fujitsu-notebook driver ... > > I assume this was "fujitsu-laptop". Yup >> ... can see ACPI notifications when any of the non-working combination is >> pressed like: >> >> [ 408.997023] FUJ02B1: call_fext_func: FUNC 0x1000 (args 0x4, 0x0, 0x0) >> returned 0x100 >> [ 408.997072] FUJ02B1: call_fext_func: FUNC 0x1002 (args 0x1, 0x0, 0x0) >> returned 0x0 >> >> so these button states seems to be handled differently then all the >> other buttons. (FUNC 0x1002 is used to check the special button states). > > For clarity, which buttons are the "non-working combinations"? Is it just > the brightness/touchpad buttons, or are there others which are behaving > similarly? I'm just talking about Fn + Brightness (Fn + (F6|F7)) and "touchpad dis-/enable" (Fn + F4) key events. Not those real extra buttons, like ECO, RFkill, etc. >> BTW: the debug message is a little misleading, as all of them are prefixed >> 'FUJ02B1', even if the ACPI event is handled by the FUJ02E3 device. > > Yes, good point. The use of "FUJ02B1" (via ACPI_FUJITSU_HID) would have > been for convenience and possibly dates from before FUJ02E3 support was > included in the driver. A case can certainly be made for a more generic > descriptor. > >> I checked the DSTD from the old and new HW. The size has more then >> duplicated (414k => 955k) with a 43k diff. The diff for the FUJ02E3 >> device is just 356 lines, but I couldn't identify anything, which might >> relate to the keys. 43k = lines. (I didn't find a way to normalize the DSTD to catch moved objects). > Perhaps they've introduced a new backlight control device with a different > HID (except you mentioned that only FUJ02E3 was listed even on other OSes, > so I guess this is unlikely). The diff of the sorted device list is also 230 lines. I checked the devices, which start with F, but these don't seem interesting. >> Any help would be appreciated to get this fixed. > > I don't have access to any of the newer Fujitsu hardware so I can't do much > in relation to debugging the problem. Obviously the buttons concerned > generate ACPI notifications. Without a FUJ02B1 and any obvious extension > to FUJ02E3, my only thought at present is that they've taken backlight > control out of ACPI (that is, based on the ACPI button notification they > poke other hardware to effect the brightness control). It does seem a bit > odd though. > > In any case, we'd have to identify what is meant to be done (and what is > done under other OSes) in reponse to these buttons. > > I assume that the brightness buttons don't do anything when fujitsu-laptop > is unloaded? I'm wondering whether the standard backlight driver might be > operational on this hardware. Unloading doesn't help. A backlight device is available via /sys/class/backlight/intel_backlight and you can change brightness manually. AFAIK this device is provided by the i915 driver. We'll use the KDE battery applet as a workaround, so users have a way to change the backlight. OTOH a colleague told me our vendor has opened a service call with Fujitsu and was told Fujitsu is working on a fix - at least for the Touchpad button (quite probably a BIOS update). If you don't have an additional ideas for me to check, I'll wait for a reply from Fujitsu. Thanks for your input Regards, Jan-Marek -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
