Trying to run Broadwell

[Michael B. Eichorn]

On Mon, 2015-12-07 at 14:34 +0100, Bertram Scharpf wrote:
> Hi,
> 
> this is from freebsd-questions:
> 
> On Thursday, 03. Dec 2015, 16:31:05 -0600, Adam Vande More wrote:
> > On Thu, Dec 3, 2015 at 4:21 PM, Bertram Scharpf <lists at bertram-scha
> > rpf.de> wrote:
> > > On Thursday, 03. Dec 2015, 13:42:25 -0700, Warren Block wrote:
> > > > On Thu, 3 Dec 2015, Bertram Scharpf wrote:
> > > > > 
> > > > >  Section "Device"
> > > > >      Identifier  "Card0"
> > > > >      Driver      "intel"
> > > > >      BusID       "PCI:0:2:0"
> > > > >  EndSection
> > > > > 
> > > > >  # pciconf -lv | grep -A 4 vga
> > > > >  vgapci0 at pci0:0:2:0:     class=0x030000 card=0x803a103c
> > > > > chip=0x16068086 rev=0x08 hdr=0x00
> > > > >      vendor     = 'Intel Corporation'
> > > > >      device     = 'Broadwell-U Integrated Graphics'
> > > > >      class      = display
> > > > >      subclass   = VGA
> > > > > 
> > > > > Looks good, doesn't it? Besides that, Linux on the same
> > > > > machine uses the "intel" driver successfully.
> > > > 
> > > > Broadwell is not yet supported by the intel driver version in
> > > > FreeBSD.
> > > > At present, vesa must be used.
> > > 
> > > What does "not yet"/"at present" mean? Is there currently
> > > work on it? I would not mind to contribute, not least
> > > because I now own an excellent testing environment.
> > 
> >  I believe broadwell is covered in the 3.8 update.
> > https://wiki.freebsd.org/Graphics/Update%20i915%20GPU%20driver%20to
> > %20Linux%203.8
> 
>   # kldload i915kms
>   kldload: can't load i915kms: No such file or directory
> 
> Kernel messages from dmesg:
> 
>   info: [drm] Initialized drm 1.1.0 20060810
>   link_elf: symbol mchdev_lock undefined
>   sysctl_unregister_oid: failed to unregister sysctl
> 
> I cannot find the symbol "mchdev_lock" in any file but
> "i915kms.ko". There is no definition of the variable in the
> source tree.
> 
> I have a running Gentoo Linux 4.1.12 here. There, in the
> kernel sources I find a definition of "mchdev_lock". Could
> that be easily copied into the FreeBSD kernel module source
> file? At the moment I'm fetching the 3.8 sources. I'm
> planning to first compare the two kernel versions, then to
> compare one of them to the above source tree.
> 
> Is this approach okay?
> 
> Bertram
> 

Are you running the freebsd-graphics-update branch?
https://github.com/freebsd/freebsd-base-graphics.git

You didn't provide a `uname -a` so that is going to be the first
question.
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