[gentoo-user] Kernel 4.x and (probably) event issues

[gentoo-user] Kernel 4.x and (probably) event issues

[Roman Dobosz]

Hi!

I've been struggling with this issues for a while with no success so 
far.

I have notebook Dell E6430 on docking station with external monitor and 
keyboard + mouse. I have tried to switch to the kernel 4.x the other 
day, and have two issues.

1. After successful boot, I've noticed, that buttons above the 
touchpad[1] stopped working. Tried to debug the thing, but they do 
nothing even under xev or in showkey - seems like they dead. Didn't find 
anything interesting by searching the net.

2. This one is more annoying. After boot to the new shiny 4.x kernel, 
devices connected via the usb seems to have aggressive power safe mode. 
For example - if I typing for a while everything is fine, if I stop for 
a couple of seconds, and then start to type, for approximately 2 seconds 
there is no response from the device, and after that i can type again. 
Note, that during those 2s no buffering is done, so whatever I'm typing 
in this short period, is lost. Same goes to the mouse movement and 
buttons.

Needless to say, that both of the issues are non-existent on 3.18.x 
series…

I'll appreciate any hint.

[1] http://ibin.co/2ZBIg3Ilkmxd

-- 
      -^-  _       something is grinding the emptiness:
   _ /O)_\//       Pride and Fall - Little
  (_(|__(_(_) grf.

Re: [gentoo-user] Kernel 4.x and (probably) event issues

[Adam Carter]

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> 1. After successful boot, I've noticed, that buttons above the
> touchpad[1] stopped working. Tried to debug the thing, but they do
> nothing even under xev or in showkey - seems like they dead. Didn't find
> anything interesting by searching the net.
>

Longshot (since i've had one instance in the last few years where i need to
rebuild xorg after a kernel update) have you tried rebuilding the
xf86-input-* packages against the new kernel?

>
> 2. This one is more annoying. After boot to the new shiny 4.x kernel,
> devices connected via the usb seems to have aggressive power safe mode.
> For example - if I typing for a while everything is fine, if I stop for
> a couple of seconds, and then start to type, for approximately 2 seconds
> there is no response from the device, and after that i can type again.
> Note, that during those 2s no buffering is done, so whatever I'm typing
> in this short period, is lost. Same goes to the mouse movement and
> buttons.
>

I haven't had much luck with USB power saving working in a useful way and
leave it off. Strange its been enabled by default for you.

cat /sys/bus/usb/devices/*/power/control will show you what the current
settings are.

The options are on/auto.

"on" means that the device should be resumed and autosuspend is not allowed.

so that's what you want. It can blanket set with;

echo on | tee /sys/bus/usb/devices/*/power/control

Or you could work out which devices are actually a problem and just "on"
those particular ones.

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[gentoo-user] Re: Kernel 4.x and (probably) event issues

[Roman Dobosz]

On Mon, 7 Mar 2016 11:00:26 +1100
Adam Carter <adamcarter3@gmail.com> wrote:

> > 1. After successful boot, I've noticed, that buttons above the
> > touchpad[1] stopped working. Tried to debug the thing, but they do
> > nothing even under xev or in showkey - seems like they dead. Didn't find
> > anything interesting by searching the net.
> Longshot (since i've had one instance in the last few years where i need to
> rebuild xorg after a kernel update) have you tried rebuilding the
> xf86-input-* packages against the new kernel?

Yep, that was the first thing, right after rebuilding 3rd party
modules, I've done.

I've done a little test with Live USB with some popular desktop
distribution, and it turns out, those buttons doesn't work there
either. Not sure if it's a kernel bug, or something else.

> > 2. This one is more annoying. After boot to the new shiny 4.x kernel,
> > devices connected via the usb seems to have aggressive power safe mode.
> > For example - if I typing for a while everything is fine, if I stop for
> > a couple of seconds, and then start to type, for approximately 2 seconds
> > there is no response from the device, and after that i can type again.
> > Note, that during those 2s no buffering is done, so whatever I'm typing
> > in this short period, is lost. Same goes to the mouse movement and
> > buttons.
> I haven't had much luck with USB power saving working in a useful way and
> leave it off. Strange its been enabled by default for you.
> 
> cat /sys/bus/usb/devices/*/power/control will show you what the current
> settings are.
> 
> The options are on/auto.
> 
> "on" means that the device should be resumed and autosuspend is not allowed.
> 
> so that's what you want. It can blanket set with;
> 
> echo on | tee /sys/bus/usb/devices/*/power/control
> 
> Or you could work out which devices are actually a problem and just "on"
> those particular ones.

Actually, this was very useful. Thank you for the hint. I've created 
simple script which gives me a device and power status next to it. 
I've compared values from the distro I've mentioned above with the 
values I get from the Gentoo system. It turns out that indeed all 
devices are set to "auto". I've noticed either, that I have running 
laptop mode (app-laptop/laptop-mode-tools), which was the one 
responsible for setting all devices to "auto". Will investigate it a
bit further, if laptop-mode was the only one who change those values.

Thanks.

-- 
      -^-  _       something is grinding the emptiness:
   _ /O)_\//       Tristesse de La Lune - Coriolis
  (_(|__(_(_) grf. https://tormentedradio.com

[gentoo-user] Kernel 4.x and (probably) event issues

[Roman Dobosz]

Hi!

I've been struggling with this issues for a while with no success so 
far.

I have notebook Dell E6430 on docking station with external monitor and 
keyboard + mouse. I have tried to switch to the kernel 4.x the other 
day, and have two issues.

1. After successful boot, I've noticed, that buttons above the 
touchpad[1] stopped working. Tried to debug the thing, but they do 
nothing even under xev or in showkey - seems like they dead. Didn't find 
anything interesting by searching the net.

2. This one is more annoying. After boot to the new shiny 4.x kernel, 
devices connected via the usb seems to have aggressive power safe mode. 
For example - if I typing for a while everything is fine, if I stop for 
a couple of seconds, and then start to type, for approximately 2 seconds 
there is no response from the device, and after that i can type again. 
Note, that during those 2s no buffering is done, so whatever I'm typing 
in this short period, is lost. Same goes to the mouse movement and 
buttons.

Needless to say, that both of the issues are non-existent on 3.18.x 
series…

I'll appreciate any hint.

[1] http://ibin.co/2ZBIg3Ilkmxd

-- 
      -^-  _       something is grinding the emptiness:
   _ /O)_\//       Mystical Sun - 15 Billion Years of Aliens
  (_(|__(_(_) grf.