lkml.org 
[lkml]   [2011]   [Dec]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: gma500: Attempting to load psb_gfx causes NULL pointer dereference error
From
On Sat, Dec 24, 2011 at 9:36 PM, Dainius (GreatEmerald)
<pastas4@gmail.com> wrote:
> When attempting to launch a Linux system with any kernel version with
> psb_gfx, I always get an error at boot time. The error includes these
> lines:
>
>    ioremap error for 0x7f579000-0x7f57a000, requested 0x10, got 0x0
>    BUG: unable to handle kernel NULL pointer dereference at   (null)
>    Oops: 0000 [#1] SMP
>
> The full error message and a stack trace can be found here:
> On openSUSE with kernel 3.1.0 - http://pastebin.com/raw.php?i=ABfX7rJQ
> On Kubuntu with kernel 3.2.0 - http://paste.ubuntu.com/781414/
>
> The device I'm using is running on the Oak Trail platform (it's a
> Fujitsu Stylistic Q550 tablet).
>
> One strange thing about it is if I try to boot the system with the
> vga=0x318 option, it throws me this error on boot, but it still loads
> the X server, although with the non-native resolution and seemingly
> without backlight control and other features. It still seems that the
> psb_gfx driver is running, however, since lsmod lists it and fbdev
> seems to be running. And if I don't pass the vga option, the X server
> crashes, complaining about /dev/fb0 not existing and fbdev failing to
> load.

Could this be a vesa driver clash? Try blacklisting vesafb and make sure
X is using the fbdev driver. Vesa and psb_gfx doesn't play well together.

Patrik
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2011-12-25 01:11    [from the cache]
©2003-2011 Jasper Spaans