[ltp] E145 with AMD A4 quad core experience?

Alex Deucher linux-thinkpad@linux-thinkpad.org
Thu, 22 May 2014 09:37:16 -0400

On Thu, May 22, 2014 at 9:11 AM, Andrey Cherepivskiy
<kosmonavt.panchenko@gmail.com> wrote:
> I got my E145 with A4 to work without significant problems, except for
> a screen brightness control, which does not work even on recent
> kernels (3.15.*) with recent thinkpad-acpi (0.25). I have to hibernate
> and then adjust brightness while my laptop does initial boot.
> I (among many others) reported this brighness control issue in
> ibm-acpi-devel, just as thinkpad-acpi suggests in dmesg, but it seems
> there's nobody to take care of it now.
> HD8330 is poorly supported by open source video driver. In particular,
> I couldn't get an xv extension to work. Hence I use the proprietary
> video driver.

The open source driver should work fine assuming you are using a new
enough version.  Xv and 2D acceleration are handled via glamor, so you
need to make sure that is installed.  Additionally the driver supports
accelerated hw decode using vdpau so that would be preferable to using
Xv for video playback.  Xv is only a rendering API (just color space
conversion and scaling) whereas vdapu supports both decode and

> There's no open source wireless driver (BCM43228) as well. Again, I
> use the proprietary one.
> In my laptop, cooler fan is constantly spinning. I hear its noise in
> relatively quiet environment only, however, this is still quite
> annoying.

Support for dynamic power management on that GPU was enabled by
default in kernel 3.14.  If you are using an older kernel, you might
try upgrading.


> On Wed, May 21, 2014 at 8:06 PM, Nicole Faerber
> <nicole.faerber@kernelconcepts.de> wrote:
>> Hi!
>> I am thinking of buying one of the Edge E145 netbooks with AMD A4 quad
>> core (once Lenovo finally offers a version without Windows).
>> I was wondering if anyone has already tried that with Linux?
>> And if yes, with which findings?
>> Does it work nicely?
>> I am currently using an X121e with AMD E-450 CPU which is pretty OK but
>> tends to get pretty warm and the fan is thus constantly spinning. I am
>> hoping that the A4 stays cooler - besides the benefits of having
>> built-in Bluetooth 4 and USB3.
>> Thanks!
>> Cheers
>>   nicole
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