[UBUNTU (3.19) PATCH 0/4] i915 to call HDA on HDMI hotplug

Timo Aaltonen tjaalton at ubuntu.com
Wed Sep 2 12:12:32 UTC 2015


On 02.09.2015 15:05, David Henningsson wrote:
> 
> 
> On 2015-09-02 13:50, Ara Pulido wrote:
>>>> These are the bugs for your reference:
>>>> Master bug:
>>>> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1490895
>>>> Dell BDW: https://bugs.launchpad.net/kittyhawk/+bug/1321986
>>>> Dell HSW: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1383997,
>>>> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1393701\
>>>> HP:
>>>> https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/1379180
>>>>
>>>> Lenovo:
>>>> https://bugs.launchpad.net/ubuntu/+source/linux-lts-utopic/+bug/1433891
>>>
>>> And the kernel to test is the +bpo2.2 kernel at
>>> http://koti.kapsi.fi/~tjaalton/skl/
>>>
>>> Please make sure you do not have any ALSA DKMS installed while testing.
>>> Thanks!
>>>
>>
>> What's the scope of the testing?
>>
>> Just testing HDMI and DP hotplug on a SKL, a BDW and a HSW system? What
>> kind of regression testing should we doing?
> 
> That would be the primary test, yes. In the sound settings dialog, one
> should see an HDMI/DP output whenever the video subsystem detects it,
> and likewise there should not be one in case the video subsystem does
> not detect one.
> 
> For HSW, BDW and SKL I believe the video subsystem automatically detects
> plug and unplug events, so then that should show up on the audio side
> too. Having it plugged in at boot time should work as expected, too.
> 
> In some cases, this has been more of a problem when the computer is
> running on battery than AC, so checking both AC power and battery power
> behaviour could be interesting.
> 
> Regressions to be checked for (other than the specified functionality
> not working): crashes, hangs, stack traces in dmesg.
> 
> Thanks a lot for helping out!

Note that there's an upstream bug where a slow unplug leaves the i915
driver thinking hdmi is still plugged in:

https://bugs.freedesktop.org/show_bug.cgi?id=76464

but you can clear the state by just running 'xrandr' after unplug.


-- 
t




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