Re: Help-On frame Buffer

["Bruno Prémont" <bonbons@linux-vserver.org>]

Hi Sanjay,

Most useful would be the pertinent part of your kernel log
(dmesg | grep -A 10 -B 10 drm) as well as some of the content
of the following sysfs files (edid is binary):
  /sys/class/drm/card0/card0-*/{dpms,edid,enabled,modes,status}

Eventually also:
  grep /sys/module/i915/parameters/*
and
  uname -a


Bruno



On Mon, 6 Dec 2010 03:49:43 sanjay anvekar wrote:
> Hi Bruno,
>     Thanks for your reply. I have recompiled the Linux kernel with 
> CONFIG_DRM_I915
> enabled, with the updated kernel file my display is looking strange. i.e. I have 
> vga=791
> option in my boot configuration file and with this actual graphics screen is 
> displayed only
> in quarter area of screen. Which is reapting twice, covering left and right 
> quarter of screen,
> rest screen is black(i.e.bottom half of the screen). 
> How can I solve this problem? Please help me. 
> With the latest Kernel file with CONFIG_DRM_I915 enabled, how do I set different 
> screen resolutions. Please let me know.
> 
> Thanks & Best Regards,
> Sanjay
> 
> 
> 
> 
> ________________________________
> From: Bruno Prémont <bonbons@linux-vserver.org>
> To: sanjay anvekar <sanjayanvekar@yahoo.com>
> Cc: intel-gfx@lists.freedesktop.org
> Sent: Sat, 4 December, 2010 2:12:57 AM
> Subject: Re: [Intel-gfx] Help-On frame Buffer
> 
> Hi,
> 
> You should look at KMS (Kernel Mode Setting) with i915 driver that you
> find under DRI. (CONFIG_DRM_I915 + CONFIG_DRM_I915_KMS)
> KMS can also be manually enabled/disabled with i915.modeset kernel
> parameter when i915 is built-in.
> 
> VESA only knows a few standard predefined modes but not the wide
> resolutions currently seen. It's based on some BIOS code and can only
> set resolution at early system boot, does not support s2ram (S3) nor any
> acceleration.
> 
> Bruno
> 
> 
> 
> On Fri, 03 December 2010 sanjay anvekar <sanjayanvekar@yahoo.com> wrote:
> > Hi,
> > 
> >     I am new to Linux and frame buffer. I am using Intel 945GSE / ICH7M chipset 
> >
> > Panel PC with integrated Intel 945GSE
> > display chipset. Different size and resolution LCD screens are interfaced to 
> >the 
> >
> > hardware (it supports Dual Channel 24-bit LVDS).
> > I am using Linux VESA frame buffer for various graphic object implementation.I 
> 
> > am able to get 1024x768 screen resolution using
> > VESA frame buffer, but I am not able to get the full screen resolution of 
> > 1366x768 pixels supported my LCD screen.
> > Currenlty for various resolution I am changing boot configuration file as 
> below
> >     e.g. vga=791 for 1024x768.
> > 
> > My existing BIOS does not list the 1366x768 resolution. So I would like to know 
> >
> > how I could get the full resolution using
> > the exsiting  hardware.
> > Please help me.
> > 
> > Thanks & Best Regards,
> > Sanjay
> > 
> > 
> 
> 
> 
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