On Mon, 2014-04-21 at 10:30 -0400, Benjamin Tissoires wrote: > On Mon, Apr 21, 2014 at 9:28 AM, Jin, Yao <yao....@linux.intel.com> wrote: > > > > > > On 2014/4/21 14:27, Jin, Yao wrote: > >> > >> > >> On 2014/4/20 23:28, Adam Williamson wrote: > >>> On Sun, 2014-04-20 at 20:08 +0800, Jin, Yao wrote: > >>>> For the issue that touch screen doesn't work, could you check power > >>>> state of LPSS devices? For example: > >>>> > >>>> cd /sys/bus/acpi/devices > >>>> grep -H . */power_state > >>>> > >>>> If they are D3cold, it should be the reason why touch screen doesn't > >>>> work. That's another issue, unrelated to this gpio patch. > >>> > >>> The touch screen worked fine with kernel 3.14, and Benjamin looked at > >>> debug output from the attempt to load the touchscreen driver when > >>> diagnosing the problem, he's not just guessing. I am building a kernel > >>> without your patch to confirm that fixes it. > >>> > >> > >> I tried the clean kernel 3.14 with the boot option "nomodeset text" on > >> Dell Venue 11 Pro (If without "nomodeset",my ubuntu is being "black > >> screen", but that should be another i915 issue). > >> > >> After system starup, I executed the "startx" to launch the xwindow. In > >> xwindow, the touchscreen work. > >> > >> I tried the kernel 3.14 again with my gpio patch applied, the result was > >> the same, the touchscreen work. > >> > >> I also check the DSDT table of Dell Venue 11 Pro by searching the > >> keyword "Interrupt", I can't find any clue for the irq conflict. > >> > >> I'm sorry I don't have a Dell Venue 8 for testing, but I guess it's > >> similar to Dell Venue 11 Pro. > > Sorry, my bad. Actually, this patch does not break the touchscreen, > but the other Adam applied does: > https://github.com/AdamWill/baytrail-m/blob/master/kernel/baytrail_gpio_quirk.patch > > This one was to enable wifi, but it actually breaks the touchscreen. > I'll try to figure out which part of the patch breaks the touchscreen. > > The good point is that I have a reproducer now on the Lenovo Miix 2, > so I'll be able to spot the pb easily. > > Sorry for having been rude, and thanks for the tests.
Cool, thanks for checking, Ben - my test build failed as I was trying to apply the display detection fix in i915 as well, but it doesn't apply against stock 3.15, and I didn't have time to fix it and fire again. I'll try and confirm your findings today. I'll let Doug know on https://bugzilla.kernel.org/show_bug.cgi?id=67921 that his patch appears to break touchscreen for us. -- Adam Williamson Fedora QA Community Monkey IRC: adamw | Twitter: AdamW_Fedora | XMPP: adamw AT happyassassin . net http://www.happyassassin.net -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/