Thinkpad x230 display brightness

[Sergey Nasonov]

I have tested Intel adapter. And test results shows problem with brightness 
control. Brightness level stop changing after loading kernel. Another problem 
I found is that laptop just hang during shutdown. I suppose that hang may be 
related to VT switch, because it still dont realized in case of Intel KMS 
driver.

USB works fine. For example suspend/resume passed fine when USB flash dive 
inserted. And after resume I can access files on that volume.

I found only one problem: If at suspend time I have running VM Windows XP then 
resume process will fail. 

On Wednesday 06 March 2013 21:21:05 Любомир Григоров wrote:
> Unfortunately, I knew that NVIDIA works. Different way the calls are made.
> I had to go back to doing acpi_call and the VBRC to set brightness between
> 0-16. While not a button, it still works. I have yet to test
> suspend/resume. Do you have USB powered after resume?
> 
> 2013/3/6 Sergey Nasonov <snasonov at bcc.ru>
> 
> > ------------------------------
> > 
> > 2012/10/20 Erich Dollansky <erich at alogreentechnologies.com
> > <http://lists.freebsd.org/mailman/listinfo/freebsd-acpi>>> 
> > > Hi,
> > > 
> > > 
> > > 
> > > On Sun, 21 Oct 2012 02:20:22 +0200
> > > 
> > > Jan Hannibal Smith <jan.schreib at gmail.com 
<http://lists.freebsd.org/mailman/listinfo/freebsd-acpi>> wrote:
> > > > Hey Guys, I just installed FreeBSD 9.1 RC2 on my ThinkPad x230, so far
> > > > 
> > > > everythings works fine except the keys for the brightness adjustment.
> > > > 
> > > > 
> > > > 
> > > > I tried the tricks I found for the x220 series but nothing helped.
> > > > 
> > > > Does anybody got a clue how I can get these buttons to work?
> > > > 
> > > > Maybe there is a patch for the kms driver?
> > > 
> > > can you check if the keys do even generate events?
> > > 
> > > 
> > > 
> > > They do not generate them on my X220.
> > > 
> > > 
> > > 
> > > If they do not generate events, you can use only the command line to
> > > 
> > > change brightness.
> > 
> > any info on this? I got a T430 from my work. I am afraid I will have to do
> > 
> > the manual calls like on my personal X220.
> > 
> > 
> > 
> > 
> > --
> > 
> > Lyubomir Grigorov (bgalakazam)
> > 
> > 
> > 
> > 
> > 
> > I am using T430 with FreeBSD 9.1 amd64. And I want to say that this laptop
> > is a best choice to install FreeeBSD on it. Brightess control work just
> > fine. But it work with nvidia card. I didnt tested integrated Intel
> > adapter. BIOS settings allows me to select primary adapter for video
> > output.
> > 
> > 
> > 
> > Message appears each time when brightness control key pressed:
> > 
> > CPU0: local APIC error 0x80
> > 
> > 
> > 
> > These errors just informational. And I dont give it any attention.
> > 
> > 
> > 
> > Suspend/resume also work without any problems.
> > 
> > 
> > 
> > I will test intel adapter and let you know if needed.
> > 
> > 
> > 
> > --
> > 
> > Best Regards,
> > 
> > Nasonov Sergey
-- 
Best Regards,
Nasonov Sergey