93 lines
3.5 KiB
Markdown
93 lines
3.5 KiB
Markdown
[[!meta title="Status of Linux on the MacBook Air 4,2"]]
|
|
|
|
## Introduction
|
|
|
|
Following up my
|
|
[[recent|macbook-air-42-correcting-multimedia-key-mapping-and-status]]
|
|
[[posts|macbook-air-42-touchpad-keyboard-correct-screen-resolution]]
|
|
[[about the MacBook Air 4,2|macbook-air-42-archlinux]] with Linux,
|
|
here's a status report of what works and what is still missing.
|
|
|
|
This report is based on ***Linux 3.2.0-rc5***.
|
|
|
|
## Screen Resolution and external screens
|
|
|
|
Great news, Linus' tree merged patches necessary for full screen resolution
|
|
and external screens work as well:
|
|
|
|
Screen 0: minimum 320 x 200, current 2560 x 2340, maximum 8192 x 8192
|
|
eDP1 connected 1440x900+0+1440 (normal left inverted right x axis y axis) 30mm x 179mm
|
|
1440x900 60.0*+
|
|
VGA1 disconnected (normal left inverted right x axis y axis)
|
|
HDMI1 disconnected (normal left inverted right x axis y axis)
|
|
DP1 disconnected 2560x1440+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
|
|
HDMI2 disconnected (normal left inverted right x axis y axis)
|
|
HDMI3 disconnected (normal left inverted right x axis y axis)
|
|
DP2 disconnected (normal left inverted right x axis y axis)
|
|
DP3 disconnected (normal left inverted right x axis y axis)
|
|
2560x1440 (0xb2) 241.5MHz
|
|
h: width 2560 start 2608 end 2640 total 2720 skew 0 clock 88.8KHz
|
|
v: height 1440 start 1443 end 1448 total 1481 clock 60.0Hz
|
|
|
|
An external monitor was tested via Mini-DP-to-HDMI adapter and Mini-DP-to-DVI
|
|
adapter with resolutions from 1920x1080 (24" Samsung) up to 2560x1440 (27" Dell).
|
|
|
|
|
|
## Keyboard/Multimedia Keys (FN+F1..F12)
|
|
|
|
With the current kernel all multimedia keys match correctly.
|
|
|
|
|
|
## Keyboard/Backlight
|
|
|
|
Keyboard backlight can be controlled using
|
|
[kbsd](http://git.schottelius.org/?p=kbsd;a=summary). This works fine,
|
|
but it could be improved to react on the light sensor.
|
|
The question simply is, how to map the light sensor values to keyboard
|
|
backlight settings. If you've got a good table or function to apply,
|
|
drop me a mail, so I can include it.
|
|
|
|
|
|
## Touchpad
|
|
|
|
The touchpad works almost completly, the only
|
|
problem left is that
|
|
the mouse pointer does not move when the mouse button is pressed.
|
|
This may be a configuration problem of the synaptics touchpad, but
|
|
I haven't found a fix for this.
|
|
|
|
|
|
## Screen backlight
|
|
|
|
The nice utility **xbacklight** still does not work,
|
|
|
|
[11:14] brief:~% xbacklight
|
|
No outputs have backlight property
|
|
|
|
but dimming works manually via echo:
|
|
|
|
[21:15] brief:~# echo 2200 > /sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/intel_backlight/brightness
|
|
|
|
And the display is not switched off when lid is closed.
|
|
ACPI reports the lid event, though. Probably a related problem.
|
|
|
|
|
|
## WLAN / brcmsmac / Broadcom BCM43224
|
|
|
|
This used to be fixed in my own patched kernel, but since I've got
|
|
a new macbook air 4,2, it does suffers the
|
|
[network process hang issue in the **brcmsmac** driver](https://lkml.org/lkml/2011/10/18/145)
|
|
again. Iterating over several different kernels did not yet fix this problem.
|
|
|
|
Though interestingly after 2 suspend and resume cycles it works, until the 4th of 5th
|
|
suspend cycle, at which all network processes hang again, if the connection to the
|
|
AP is lost.
|
|
|
|
## Current problem summary
|
|
|
|
* Clicking and moving the mouse pointer does not work
|
|
* xbacklight does not recognise backlight controls
|
|
* Display is not switched off on lid close
|
|
* Network processes hang when the connection to the AP is lost/cannot be established
|
|
|
|
[[!tag net unix]]
|