linux-kernel - Re: intelfb refuses to load

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Date:	Sun, 12 Dec 2010 21:39:57 +0800
From:	Dave Young <hidave.darkstar@...il.com>
To:	Bruno Prémont <bonbons@...ux-vserver.org>
Cc:	Pavel Machek <pavel@....cz>,
	kernel list <linux-kernel@...r.kernel.org>,
	dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
	mbroemme@...sserver.de
Subject: Re: intelfb refuses to load

On Sun, Dec 12, 2010 at 6:43 AM, Bruno Prémont
<bonbons@...ux-vserver.org> wrote:
> Hi,
>
> Looks like you are using the wrong intel driver.
>
> For intel modesetting you need
> CONFIG_DRM=y
> CONFIG_DRM_KMS_HELPER=y
> # CONFIG_DRM_TDFX is not set
> # CONFIG_DRM_R128 is not set
> # CONFIG_DRM_RADEON is not set
> # CONFIG_DRM_I810 is not set
> # CONFIG_DRM_I830 is not set
> CONFIG_DRM_I915=y
> # CONFIG_DRM_I915_KMS is not set

CONFIG_DRM_I915_KMS=y needed as well?

> # CONFIG_DRM_MGA is not set
> # CONFIG_DRM_SIS is not set
> # CONFIG_DRM_VIA is not set
> # CONFIG_DRM_SAVAGE is not set
>
> # CONFIG_FB_I810 is not set
>
> That will give you inteldrmfb.
>                        ^^^
>
> Not sure what dependency is missing in your config that DRM_I915 does
> not show up... (it might be CONFIG_AGP_INTEL)
>
> intelfb (CONFIG_FB_I810) is obsolete and only supports a pretty limited
> part of intel GPU features, modesetting only for VGA output (and not
> sure it works at all with recent GPUs).
>
> Bruno
>
>
> On Sat, 11 December 2010 Pavel Machek <pavel@....cz> wrote:
>> Hi!
>>
>> I'm trying to fix up my kernel setup so that X is happy... currently
>> it fails to start with:
>>
>> FATAL: Could not load /lib/modules/2.6.37-rc5+/modules.dep: No such
>> file or directory
>> (EE) intel(0): No kernel modesetting driver detected.
>> (EE) Screen(s) found, but none have a usable configuration.
>>
>> So far I have:
>>
>> CONFIG_DRM=y
>> # CONFIG_DRM_TDFX is not set
>> # CONFIG_DRM_R128 is not set
>> # CONFIG_DRM_RADEON is not set
>> # CONFIG_DRM_I810 is not set
>> # CONFIG_DRM_MGA is not set
>> # CONFIG_DRM_SIS is not set
>> # CONFIG_DRM_VIA is not set
>> # CONFIG_DRM_SAVAGE is not set
>> # CONFIG_STUB_POULSBO is not set
>> CONFIG_VGASTATE=y
>> CONFIG_VIDEO_OUTPUT_CONTROL=y
>> CONFIG_FB=y
>> CONFIG_FB_I810=y
>> # CONFIG_FB_I810_GTF is not set
>> # CONFIG_FB_LE80578 is not set
>> CONFIG_FB_INTEL=y
>> CONFIG_FB_INTEL_DEBUG=y
>> CONFIG_FB_INTEL_I2C=y
>> # CONFIG_FB_MATROX is not set
>>
>> And on the command line:
>>
>> BOOT_IMAGE=(hd0,2)/l/linux-good/arch/i386/boot/bzImage root=/dev/sda4
>> resume=/dev/sda1 psmouse.psmouse_proto=imps psmouse_proto=imps
>> psmouse.proto=imps vga=791 init=/tmp/swsusp-init
>> acpi_sleep=s3_bios,s3_mode no_console_suspend i915.modeset=1
>> video=intelfb:mode=1024x768 fbcon=scrollback:64k
>>
>> ...but intelfb fails with:
>>
>> [drm] Initialized drm 1.1.0 20060810
>> intelfb: intelfb_init
>> intelfb: Framebuffer driver for Intel(R)
>> 830M/845G/852GM/855GM/865G/915G/915GM/945G/945GM/945GME/965G/965GM
>> chipsets
>> intelfb: Version 0.9.6
>> intelfb: intelfb_setup
>> intelfb: options: mode=1024x768
>> intelfb: intelfb_pci_register
>> intelfb 0000:00:02.0: power state changed by ACPI to D0
>> intelfb 0000:00:02.0: power state changed by ACPI to D0
>> intelfb 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
>> intelfb: fb aperture: 0xd0000000/0x10000000, MMIO region:
>> 0xee100000/0x80000
>> intelfb: Cannot reserve FB region.
>> intelfb: cleanup
>>
>> Any hints? If I'm doing some trivial mistake, perhaps "cannot reserve
>> FB region" message could be improved?
>>                                                                       Pavel
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-- 
Regards
dave
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