Re: [PATCH] Add a quirk for the Dell XPS 13 (2015) when in PS/2 mode.

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




On 04/10/2015 06:14 PM, Pali Rohár wrote:
On Saturday 11 April 2015 01:07:03 Mario Limonciello wrote:
I could see problem with using older kernels which are in more
stable or LTS distribution versions...

But it is nice that problems are fixes for future 4.0/4.1
versions.

And if you located reason for invalid packets in PS/2 mode, will
you fix it in some new bios versions?

Can you comment if this is also same problem with invalid packets
on E6440/E7440 machines?

Hi Pali,

For the XPS 13, yes earlier kernel versions will be affected, but we are encouraging users to run with 3.16+.  There are enough other issues with I2C touchpad, MST, HDA audio and other things that people will have a better experience on those kernels.  People who will install Ubuntu 14.04 LTS we will encourage to install the HWE stack that provides 3.16 or 3.19 instead.  Canonical is backporting fixes for I2C and HDA issues into these kernels already.

The root cause for the invalid packets in PS/2 mode on the XPS 13 is not fixable via a BIOS update.

The invalid packets on the Exx40 machines I believe is caused by some behavior that happens if the touchpad/trackstick receives data shortly after the internal keyboard was busy.  An interrupt is fired on the EC that will cause it discard data.  I think this is why it ends up on the other end looking like it does.
--
To unsubscribe from this list: send the line "unsubscribe linux-input" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux Media Devel]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [Linux Wireless Networking]     [Linux Omap]

  Powered by Linux