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what is an intelfb kernel module?

Linux Kernel, Network, and Services configuration.
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lizbeth
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what is an intelfb kernel module?

#1 Post by lizbeth »

does anyone know?
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Re: what is an intelfb kernel module?

#2 Post by bw123 »

framebuffer video module for intel graphics chipset?
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vbrummond
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Re: what is an intelfb kernel module?

#3 Post by vbrummond »

I typed into my bar: intelfb. It came up with a web page that looks like this: https://duckduckgo.com/?q=intelfb

The first result on that page for me was this: http://www.mjmwired.net/kernel/Document ... ntelfb.txt

Which said:
This is a framebuffer driver for various Intel 8xx/9xx compatible graphics devices.
You have a search bar.
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lizbeth
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Re: what is an intelfb kernel module?

#4 Post by lizbeth »

Right! I do! So sorry to bother you with trivial matters....
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Re: what is an intelfb kernel module?

#5 Post by lizbeth »

does debian supply this kernel module? The obvious answer seems no, as I seem not to find one. It is not for me but for someone else who has need. Never mind, I'll search their site....
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vbrummond
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Re: what is an intelfb kernel module?

#6 Post by vbrummond »

The documentation for it is in the kernel docs, but that doesn't mean the module is there. You can check by running:

Code: Select all

modprobe -l | grep intelfb
Also note if the module is called something other than intelfb my command won't work. You could also try the below and see if you can spot it in the list.

Code: Select all

modprobe -l | grep fb
It isn't in my openSUSE 3.4 kernel is all I know. Edit: Or heck try to load it outright, just do:

Code: Select all

modprobe intelfb
Which nets me FATAL: Module intelfb not found but I am not on Debian ATM.
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Re: what is an intelfb kernel module?

#7 Post by bw123 »

think they changed it to inteldrmfb

http://wiki.debian.org/KernelModesetting
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Re: what is an intelfb kernel module?

#8 Post by emariz »

Where do you live, Mars? FB means Facebook.

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lizbeth
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Re: what is an intelfb kernel module?

#9 Post by lizbeth »

Ok, well I am at a loss as how to install it or where to find it in any debian or ubuntu package.
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Re: what is an intelfb kernel module?

#10 Post by vbrummond »

I don't think you just 'install it'. It is supposed to be a part of the kernel. Or even if you did install it, it probably wouldn't would be useful. It doesn't seem like intel uses such a driver any more. You might try using the standard fbdev driver by booting the system with the nomodeset parameter. Lastly, I gave quick answers but this seems like a situation where you not asking about the problem but a solution.

What is the actual problem? Using the intelfb driver is probably not the correct solution to 'the problem'.
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Re: what is an intelfb kernel module?

#11 Post by lizbeth »

http://forums.linuxmint.com/viewtopic.p ... 1&t=115393


Someone has poor responding programs in a debian derivative aka lmde and they notice that in mint 13 maya, aka ubuntu derivative there is loaded i915 kernel driver and intelfb kernel driver and no sluggish programs.

I have made it a burden to research his concern.

that is all
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Re: what is an intelfb kernel module?

#12 Post by lizbeth »

Hey on the plus side i built chromium (though it's 2 gigs in size) and I got sandbox working.....
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Re: what is an intelfb kernel module?

#13 Post by vbrummond »

i915 is the correct driver. The user should probably even blacklist intelfb if it is enabled.
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Re: what is an intelfb kernel module?

#14 Post by bw123 »

try a kernel parameter? video=intelfb:on or :off
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Re: what is an intelfb kernel module?

#15 Post by lizbeth »

I found this in my research

Edit the /etc/defaul/grub and modify the
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
to
GRUB_CMDLINE_LINUX_DEFAULT="video=vesafb:off quiet splash"

The run as root the following:
# update-grub
# grub-install
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Re: what is an intelfb kernel module?

#16 Post by lizbeth »

That's just it, in his debian build there is none and he's getting a sluggish response. In the maya build it's showing one (he claims) and he has no problems. I thought it would be a simple fix or I wouldn't have taken it on. I've spent hours on it so far.
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emariz
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Re: what is an intelfb kernel module?

#17 Post by emariz »

Code: Select all

$ cat /etc/debian_version 
6.0.6

$ uname -a
Linux debian 3.2.0-0.bpo.3-amd64 #1 SMP Thu Aug 23 07:41:30 UTC 2012 x86_64 GNU/Linux

Code: Select all

$ lspci -vnn

00:02.0 VGA compatible controller [0300]: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
	Subsystem: Sony Corporation Device [104d:908a]
	Flags: bus master, fast devsel, latency 0, IRQ 41
	Memory at d0000000 (64-bit, non-prefetchable) [size=4M]
	Memory at c0000000 (64-bit, prefetchable) [size=256M]
	I/O ports at 4000 [size=64]
	Expansion ROM at <unassigned> [disabled]
	Capabilities: <access denied>
	Kernel driver in use: i915

Code: Select all

$ su -c 'modinfo i915'

filename:       /lib/modules/3.2.0-0.bpo.3-amd64/kernel/drivers/gpu/drm/i915/i915.ko
license:        GPL and additional rights
description:    Intel Graphics
author:         Tungsten Graphics, Inc.
license:        GPL and additional rights
depends:        drm,drm_kms_helper,i2c-core,video,button,i2c-algo-bit
intree:         Y
vermagic:       3.2.0-0.bpo.3-amd64 SMP mod_unload modversions 
parm:           modeset:Use kernel modesetting [KMS] (0=DRM_I915_KMS from .config, 1=on, -1=force vga console preference [default]) (int)
parm:           fbpercrtc:int
parm:           panel_ignore_lid:Override lid status (0=autodetect [default], 1=lid open, -1=lid closed) (int)
parm:           powersave:Enable powersavings, fbc, downclocking, etc. (default: true) (int)
parm:           semaphores:Use semaphores for inter-ring sync (default: -1 (use per-chip defaults)) (int)
parm:           i915_enable_rc6:Enable power-saving render C-state 6 (default: -1 (use per-chip default) (int)
parm:           i915_enable_fbc:Enable frame buffer compression for power savings (default: -1 (use per-chip default)) (int)
parm:           lvds_downclock:Use panel (LVDS/eDP) downclocking for power savings (default: false) (int)
parm:           lvds_use_ssc:Use Spread Spectrum Clock with panels [LVDS/eDP] (default: auto from VBT) (int)
parm:           vbt_sdvo_panel_type:Override selection of SDVO panel mode in the VBT (default: auto) (int)
parm:           reset:Attempt GPU resets (default: true) (bool)
parm:           enable_hangcheck:Periodically check GPU activity for detecting hangs. WARNING: Disabling this can cause system wide hangs. (default: true) (bool)

Code: Select all

$ lsmod | grep i915

i915                  362150  2 
drm_kms_helper         26950  1 i915
drm                   167089  3 i915,drm_kms_helper
i2c_algo_bit           12834  1 i915
i2c_core               23766  6 videodev,i915,drm_kms_helper,drm,i2c_algo_bit,i2c_i801
button                 12895  1 i915
video                  17553  1 i915
The modules drm and drm_kms_helper seem relevant.

About the parameter i915_enable_fbc:
https://wiki.ubuntu.com/Kernel/PowerMan ... vingTweaks

I only enabled the parameter i915.i915_enable_rc6 because the other one caused some issues with LibreOffice Calc:
http://forums.debian.net/viewtopic.php?f=6&t=79169

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Re: what is an intelfb kernel module?

#18 Post by bw123 »

lizbeth wrote:I found this in my research

Edit the /etc/defaul/grub and modify the
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
to
GRUB_CMDLINE_LINUX_DEFAULT="video=vesafb:off quiet splash"

The run as root the following:
# update-grub
# grub-install
do it on the grub boot menu to save time and hard drive thrashing, then when you find what works, make the changes permanent with above. don't think you need to run grub-install though?
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