Lenovo X230 - suspend/resume video issues

[Kevin Oberman]

On Thu, Aug 8, 2013 at 4:00 PM, Adrian Chadd <adrian at freebsd.org> wrote:

> Hiya,
>
> I have an Lenovo Thinkpad X230 running FreeBSD-10. I'd like some help
> in sorting out the following issues:
>
> * the ACPI and IBM sysctls for twiddling the LCD brightness don't at all
> work
> * The backlight comes on during resume, but the video definitely doesn't
> * I'm still investigating whether xorg actually comes back from resume
> (and it's a video problem) or whether it hangs on resume.
>
> The files are here:
>
> http://people.freebsd.org/~adrian/laptop/lenovo_x230
>
> Thanks!
>
>
> -adrian
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Adrian,

Take a look at the thread "Fixing X220 Video The Right Way" in the ACPI ML.
Also look at "Fixing suspend/resume on Lenovo x220". Both went over several
months, but ended in mid-June. Whether this aproach will work on the X230
is not entirely clear. Use of ACPI_CALL is really a mostly unworkable
kludge.

The suspend/resume issues will almost certainly not be resolved on any
platform with recent Intel or Radeon GPUs requiring KMS until the newcons
code is committed. That likely won't resolve all issues, but will deal with
a major one and one that largely blocks resolving (or even identifying)
others.

I have a T550 which has a BIOS that largely is similar to the X220. One
issue that Thinkpads of this vintage all seem to have is the inability to
boot a gpt disk.. (Actually, if you have another drive (even USB) with
booteasy on it, you can, but BIOS refuses to run an MBR from a GPT
formatted disk. It assumes that GPT disks are all EUFI, which is seriously
broken. I'd love to see that this is fixed. Guess I should see if Lenovo
has a new BIOS that might fix it.
-- 
R. Kevin Oberman, Network Engineer
E-mail: rkoberman at gmail.com