x220 notes

[Matt]

On 09/28/11 11:52, Garrett Cooper wrote:
> On Wed, Sep 28, 2011 at 11:48 AM, Matt<sendtomatt at gmail.com>  wrote:
>> I just picked up an X220 and have been trying to get FreeBSD running well.
>>
>> Some tips
>> ichsmb
>> acpi_video (attaches but doesn't work)
>> aesni
>> coretemp
>>
>> powerd is a must, these processors seem to be designed to run very hot
>> unless throttled. Somehow my C3 state disappears when on AC, I think that's
>> a bios setting?
>>
>> acpi_ibm needs "LEN0068" added to the list of ibm ids at the beginning of
>> /usr/src/sys/dev/acpi_support/acpi_ibm.c...I'd write a patch but that
>> machine is in a world of ports hurt right now :).
>> With this many of the sysctls and leds work, still no brightness (w or wout
>> intel DRI from Konstantin...thanks Konstantin!!)
>>
>> sleep/resume work, but screen is off after resume and cannot be awakened
>> (even w/ dpms and or acpi_video).
> This is probably another driver bug. Try kldunloading and kldloading
> your wlan driver to see if that works, and/or start stripping your
> kernel of unnecessary options until you find the magic formula for
> what works, and just apply that to rc.suspend // rc.resume and file a
> PR for the driver bug if there isn't one already.
> HTH,
> -Garrett
>

Driver bug in wireless can leave the screen off?
I can for instance type reboot and reboot etc.

I also noticed that acpi_video attaches, but nothing works. Looking at 
AML it appears that the correct "hooks" are present, but lcd0 shows as 
inactive and does not go to "1" in sysctl.

ibm_acpi lcd_brightness hooks do not work either.

debug.acpi.reset_video does VERY bad things, involving a reboot loop and 
flashing thinklight

Is there anything else I can do to turn the damn thing back on?
Any other logging or things to look at?

I will try a minimal kernel shortly.

Thanks,
Matt