> On Wed, Feb 15, 2017 at 9:54 PM, Michał Kępień <kernel@xxxxxxxxxx> wrote:
> > Alex,
> >
> >> I tested the patches with the following setup. Please note I tested
> >> the microphone mute led by GUI, as the hotkey does not work on this
> >> system.
> >
> > Thank you for taking the time to test this series, it is appreciated. I
> > would not expect the switching method (GUI/hotkey) to matter here, as
> > long as we can compare behavior of two kernel versions by consistently
> > using one of them.
> >
> >>
> >> 1. Downloaded the below patches from patchwork
> >>
> >> 9518737 Awaiting Upstream [v2,1/6] dell-led: remove GUID check from
> >> dell_micmute_led_set()
> >> 9518761 Awaiting Upstream [v2,2/6] ALSA: hda - use
> >> dell_micmute_led_set() instead of dell_app_wmi_led_set()
> >> 9518741 Awaiting Upstream [v2,3/6] ALSA: hda - rename
> >> dell_led_set_func to dell_micmute_led_set_func
> >> 9518725 Awaiting Upstream [v2,4/6] platform/x86: dell-laptop: import
> >> dell_micmute_led_set() from drivers/leds/dell-led.c
> >> 9518727 Awaiting Upstream [v2,5/6] dell-led: remove code related to mic mute LED
> >> 9518735 Awaiting Upstream [v2,6/6] dell-led: move driver to
> >> drivers/platform/x86/dell-wmi-led.c
> >> 9520053 Awaiting Upstream [v2,6+/6] platform/x86: dell-wmi-led: fix
> >> coding style issues
> >>
> >> 2. Installed Ubuntu 16.10 (Linux kernel 4.8) on Dell Latitude 7180
> >
> > Just to be sure, I assume you meant 7280?
>
> This is a typo, and it should be 7480, which should be the same as 7280.
>
> >
> >>
> >> -> Microphone mute led works as expected
> >>
> >> 3. Applied downloaded patches to kernel 4.8 without any conflicts, but
> >> kernel will not compile successfully.
> >
> > I am confused. This patch series should apply cleanly to 4.9 and its
> > surroundings. Between 4.8 and 4.9, commit 4875a5f72180 ("ALSA: hda -
> > Fix a failure of micmute led when having multi adcs") happened. This
> > makes it impossible to apply this patch series cleanly on top of 4.8
> > without reducing context to one line.
> >
> > Moreover, I applied this patch series (with reduced context) to 4.8 and
> > successfully compiled the kernel. Could you shed some light on where
> > exactly did your build crash?
>
> The error messages such as below, so it is probably not "fails to
> compile". Since 4.9 works better, I probably will focus on 4.9 & 4.10,
> though.
I agree as I see no reason for this patch series to be backported.
>
> find /home/alexhung/src/kernel/ubuntu-yakkety/debian/build/build-generic/
> -name \*.ko | \
> sed -e 's/.*\/\([^\/]*\)\.ko/\1/' | sort >
> /home/alexhung/src/kernel/ubuntu-yakkety/debian.master/abi/4.8.0-37.39/amd64/generic.modules
> II: Checking modules for generic...
> reading new modules...read 4821 modules.
> reading old modules...
> MISS: dell-led
> NEW : dell-wmi-led
> read 4821 modules : new(1) missing(1)
> EE: Missing modules (start begging for mercy)
> debian/rules.d/4-checks.mk:12: recipe for target 'module-check-generic' failed
> make: *** [module-check-generic] Error 1
Ah, okay, so you are using the Debian/Ubuntu build method. The messages
it spits out are correct as the purpose of this series is to remove
dell-led and create dell-wmi-led. However, I have never compiled a
kernel using the Debian/Ubuntu way, so I am unable to give you any tips
for getting rid of the "Missing modules" error message.
>
>
> >
> >>
> >> 4. Installed Ubuntu Zesty kernel (Linux kernel 4.9)
> >>
> >> -> Microphone mute led works as expected
> >>
> >> 5. Applied and compiled downloaded patches to kernel 4.9
> >>
> >> -> Microphone mute led does not work
> >
> > Any chance of a git bisect?
>
> Certainly. Give me some time.
Sure, no rush, though before you start bisecting, please check whether
CONFIG_DELL_LAPTOP is enabled in your kernel configuration for 4.9.
>
> >
> >>
> >> 6. Compiled and installed Linux kernel 4.10 rc8
> >>
> >> -> Microphone mute led does not work
> >
> > This is even more confusing. Between 4.9, which you claim works fine,
> > and 4.10-rc8, which you claim does not work, I can see no changes to
> > either drivers/leds/dell-led.c or sound/pci/hda/dell_wmi_helper.c.
> > Kernel configuration issue?
>
> I was surprised too, and I compiled it twice and installed on both
> Ubuntu 16.04 and 16.10.
>
> I would guess it is config too. On 4.9, it was using Ubuntu default.
> On 4.10rc8, I am pretty much using the instruction on
> https://wiki.ubuntu.com/KernelTeam/GitKernelBuild. The .config is
> available @ http://paste.ubuntu.com/24001113/
CONFIG_DELL_SMBIOS is not set in that .config. That prevents you from
enabling CONFIG_LEDS_DELL_NETBOOKS, which is required for the microphone
mute LED to work without this patch series applied.
>
>
> >
> >>
> >> 7. Applied and compiled downloaded patches to kernel 4.10 rc8
> >>
> >> -> Microphone mute led does not work
> >
> > No surprises here if it really does not work with 4.10-rc8.
My remark regarding CONFIG_DELL_LAPTOP also applies to 4.10-rc8 with
this patch series applied.
Thanks again for your work on this,
--
Best regards,
Michał Kępień
