This is the latest ubuntu LTS (14.04 iirc) I will double check when I get
home.
That said, the suspend functionality apparently works now, but this
regression did occur after I installed an ssd and reinstalled with the
latest LTS ubuntu.
On Thu, May 7, 2015 at 1:17 PM, Henrique de Moraes Holschuh <h...@hmh.eng.br>
wrote:
> On Thu, May 7, 2015, at 14:19, Henrique de Moraes Holschuh wrote:
>
> On Tue, Apr 21, 2015, at 16:04, Andrew Wienecke wrote:
>
> This was working previously, was working during the netboot install, is no
> longer working. Fixes online didn't. I'm going to try a few more things,
> but this is about all the useful stuff I'm aware that I should provide, let
> me know if you need more.
>
> [ 3.470352] thinkpad_acpi: ThinkPad ACPI Extras v0.25
> [ 3.470360] thinkpad_acpi: http://ibm-acpi.sf.net/
> [ 3.470363] thinkpad_acpi: ThinkPad BIOS GSET60WW (2.05 ), EC unknown
> [ 3.470366] thinkpad_acpi: Lenovo ThinkPad X140e, model 20BLS00400
> [ 3.476142] thinkpad_acpi: Unsupported brightness interface, please
> contact ibm-acpi-devel@lists.sourceforge.net
> [ 3.483092] thinkpad_acpi: radio switch found; radios are enabled
> [ 3.483124] thinkpad_acpi: possible tablet mode switch found; ThinkPad
> in laptop mode
> [ 3.483148] thinkpad_acpi: This ThinkPad has standard ACPI backlight
> brightness control, supported by the ACPI video driver
> [ 3.483151] thinkpad_acpi: Disabling thinkpad-acpi brightness events by
> default...
>
>
> Well, brightness control for the X140e goes through the GPU drivers, and
> not thinkpad-acpi. Check the ATI Radeon driver stack, etc.
>
> IOW, the issue is unlikely (but not impossible) to be related to
> thinkpad-acpi.
>
>
> I replied too soon. This is either an Ubuntu or Debian with a 3.16
> kernel, correct? Apparently there is some sort of change (and a
> regression) in the 3.16-ckt longterm kernel series which both distros use
> for their kernels.
>
> It is still very weird that it caused an user-visible change in brightness
> handling, but I need to know what changed in that kernel to understand what
> is happening.
>
> --
> "One disk to rule them all, One disk to find them. One disk to bring
> them all and in the darkness grind them. In the Land of Redmond
> where the shadows lie." -- The Silicon Valley Tarot
> Henrique Holschuh
>
>
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