Re: Re: 2.6.12-rc1-mm2 -- nvidiafb driver gives black screen

["Randy.Dunlap" <rddunlap@osdl.org>]

Miles Lane wrote:
> On Thu, 24 Mar 2005 20:31:18 -0800, Andrew Morton <akpm@osdl.org> wrote:
> 
>>(Added the mailing list - trust that's ok)
>>
>>Miles Lane <miles.lane@gmail.com> wrote:
>>
>>>Kernel command line: BOOT_IMAGE=Linux ro root=306 video=nvidiafb
>>>init=/etc/init lang=us apm=power-off nomce
>>>nvidiafb: nVidia device/chipset 10DE0312
>>>nvidiafb: nVidia Corporation NV31 [GeForce FX 5600]
>>>nvidiafb: CRTC0 found
>>>nvidiafb: CRTC1 not found
>>>nvidiafb: EDID found from BUS1
>>>nvidiafb: CRTC 0 appears to have a CRT attached
>>>nvidiafb: Using CRT on CRTC 0
>>>
>>>
>>>>>I am wondering whether the following two lines point to the problem.
>>>
>>>allocation failed: out of vmalloc space - use vmalloc=<size> to increase size.
>>>nvidiafb: cannot ioremap FB base
>>
>>Quite possibly.
>>
>>I'll do rc2-mm3 tonight - please test that.  It has fixes.
> 
> 
> Hello Andrew,
> 
> mm3 did not fix the problem.  I still get a blank framebuffer console.
> I still get these two errors:
> allocation failed: out of vmalloc space - use vmalloc=<size> to increase size.
> nvidiafb: cannot ioremap FB base
> Also, I still get the /sys listing Oops when listing the i2c entries
> for the nvidiafb.
> Lastly, I get the Oops that halts booting if I include certain other
> i2c drivers in the build.
> Removing nvidiafb from the build allows me to get a completely usable
> build of 2.6.12-rc1-mm3.
> 
> I haven't heard anything from the author of the nvidiafb driver about
> the various issues I have reported.

I guess that there is some chance that the io_remap_pfn* patches
are involved with this.  Is there some way to determine exactly which
io remap kernel calls are involved in "nvidiafb: cannot ioremap FB 
base" ?  Is that in the exposed source code?  If so, where is that
source code?  If not, can we determine from the binary which calls
are being made?  Or should I just make a io_remap debug patch that
prints out lots of debug info so that we can track this down?


-- 
~Randy


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