Input Brightness events on EeePc 1201HA
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CCing linux-acpi and Zhang Rui.
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Quoted 2 lines
- Does brightness react to keypress (up and/or down) in grub ? windows ? linux wihout X ?
It does not work in GRUB for an unknown reason but I have "good" news
It works in Linux, without using video (which can not manage this machine), until psb driver is loaded and creates a backlight device using PWM!
Looking at the dsdt:
Method (STBR, 0, Serialized)
{
If (And (^^^GFX0.TCHE, 0x02))
{
ISMI (0x7A)
^^^GFX0.AINT (One, PAR0)
}
Else
{
ISMI (0x78)
}
}ISMI (0x78) is the working path, so when psb load, And (^^^GFX0.TCHE, 0x02) become true, Maybe in this case the psb driver should do something that it doesn't.
A quick workaround would be to send input events in eeepc-laptop if GFX0.TCHE & 0x2, but does not sound pretty.
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Unfortunately I can't think of a solution for machines using psb except disabling backlight handling there.
It would either conflict (2 backlights device, on in psb, the other in eeepc-laptop/wmi) or have keys not handled (as both would not handle them if they do not handle backlight)
Signature · 2 lines
Corentin Chary http://xf.iksaif.net
Quoted 3 lines · Corentin Chary
Quoted 3 lines
It works in Linux, without using video (which can not manage this machine), until psb driver is loaded and creates a backlight device using PWM!
The PSB driver needs to implement the Intel video device opregion spec. Unfortunately it's developed in a closed environment and we have no ability to contribute fixes to it.
Signature · 1 line
Matthew Garrett | [email protected]