[Intel-gfx] Help-On frame Buffer

[Bruno Prémont]

Hi Sanjay,

Note, please keep list CCed and avoid HTML e-mails.
In addition, inlining (without line wrapping) the log snippled would
have been preferred (easier to replying).

On Thu, 9 Dec 2010 07:43:18 sanjay anvekar wrote:
> Hi Bruno,
>     Thanks for your reply.
> Attached is the ouput of  ("dmesg | grep -A 10 -B 10 drm") as "drm.txt".
>
>
> [    1.836] ACPI: SSDT 3f7ce0c0 00CC (v0  PmRef  Cpu1Ist 0030 INTL 2011)
> [    1.841] ACPI: SSDT 3f7ce3d0 005 (v0  PmRef  Cpu1Cst 0030 INTL 2011)
> [    1.857] ACPI: CPU1 (power states: C1[C1] C2[C2] C3[C3])
> [    1.851] processor LNXCPU:0: registered as cooling_device1
> [    1.801] Non-volatile memory driver v1.3
> [    1.814] intel_rng: FWH not detected
> [    1.878] Linux agpgart interface v0.13
> [    1.846] agpgart-intel 00:0:0.0: Intel 95GME Chipset
                                            ^^^^^
This device name looks suspicious (as do all the i95 on the following lines...

What exact kernel version are you using?

> [    1.815] agpgart-intel 00:0:0.0: detected 73K stolen memory
> [    1.908] agpgart-intel 00:0:0.0: AGP aperture is 26M @ 0xd0000
> [    1.970] [drm] Initialized drm 1.1.0 2001
> [    1.932] i95 00:0:0.0: PCI INT A -> GSI 1 (level, low) -> IRQ 1
> [    1.998] i95 00:0:0.0: setting latency timer to 6
> [    2.217] i2c-adapter i2c-2: unable to read EDID block.
> [    2.239] i95 00:0:0.0: LVDS-1: no EDID data
> [    2.319] i2c-adapter i2c-3: unable to read EDID block.
> [    2.336] i95 00:0:0.0: LVDS-1: no EDID data
> [    2.357] i2c-adapter i2c-2: unable to read EDID block.
> [    2.381] i95 00:0:0.0: LVDS-1: no EDID data

As there does not seem to be a working EDID around, driver will have to
find LVDS display details somewhere in VBIOS blob. (which might fail,
in which case dumping VBIOS will be needed for someone the have a look
at it)

echo 1 > /sys/class/drm/card0/device/rom
cat /sys/class/drm/card0/device/rom > vbios.bin

And attach the vbios. (Well hoping you don't get the same error as
for the other sysfs files)

> [    2.362] fb: conflicting fb hw usage inteldrmfb vs VESA VGA - removing generic driver

Could you try disabling vesafb in kernel config?

> [    2.381] Console: switching to colour dummy device 8x2
> [    2.381] Console: switching to colour dummy device 8x2
> [    2.582] [drm] LVDS-8: set mode 12x78 c
> [    2.794] Console: switching to colour frame buffer device 18x4
> [    2.794] Console: switching to colour frame buffer device 18x4

Unless a specific character go eaten your console size definitely looks
damn small!

> [    2.786] [drm] fb0: inteldrmfb frame buffer device
> [    2.780] [drm] Initialized i95 1.6.0 2003 for 00:0:0.0 on minor 0
> [    2.788] Serial: 85/150 driver, 4 ports, IRQ sharing enabled
> [    3.021] serial85: ttyS0 at I/O 0x3f8 (irq = 4) is a 150A
> [    3.261] serial85: ttyS1 at I/O 0x2f8 (irq = 3) is a 150A
> [    3.501] serial85: ttyS2 at I/O 0x3e8 (irq = 1) is a 150A
> [    3.741] serial85: ttyS3 at I/O 0x2e8 (irq = 1) is a 150A
> [    3.742] 0:0: ttyS0 at I/O 0x3f8 (irq = 4) is a 150A
> [    3.752] 0:0: ttyS1 at I/O 0x2f8 (irq = 3) is a 150A
> [    3.751] 0:0: ttyS2 at I/O 0x3e8 (irq = 1) is a 150A
> [    3.762] 0:0a: ttyS3 at I/O 0x2e8 (irq = 1) is a 150A
> [    3.718] brd: module loaded
>
> Unfortunatley I could not get "sysfs" files ,it returned some error.

What error are you getting?

> Also 
> 
>    "grep /sys/module/i915/parameters/*" and  "uname -a"  returned nothing.

Weird...

> Also I am attaching my basic graphic display file where I amusing VESA frame 
> buffer.

As long as framebuffer console is not properly setup it makes no sense to look
at your program, the issue lying in i915 driver or data it can obtain from vbios.

> Please suggest me something.
> 
> Thanks & Best Regards,
> Sanjay
> 
> 
> 
> 
> ________________________________
> From: Bruno Prémont <bonbons at linux-vserver.org>
> To: sanjay anvekar <sanjayanvekar at yahoo.com>
> Cc: intel-gfx at lists.freedesktop.org
> Sent: Mon, 6 December, 2010 6:35:41 PM
> Subject: Re: [Intel-gfx] Help-On frame Buffer
> 
> 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 at linux-vserver.org>
> > To: sanjay anvekar <sanjayanvekar at yahoo.com>
> > Cc: intel-gfx at 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 at 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
> > > 
> > > 
> > 
> > 
> > 
> 
> 
>