linux-kernel - Re: X200: Brightness broken since 2.6.29-rc4-58-g4c098bc

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Date:	Mon, 09 Mar 2009 19:28:11 -0700
From:	Eric Anholt <eric@...olt.net>
To:	Nico Schottelius <nico-linux-20090213@...ottelius.org>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: X200: Brightness broken since 2.6.29-rc4-58-g4c098bc

On Fri, 2009-02-13 at 10:40 +0100, Nico Schottelius wrote:
> Nico Schottelius [Fri, Feb 13, 2009 at 10:33:54AM +0100]:
> > [...]
> 
> dmesg:

> [  129.846561] [drm] Initialized drm 1.1.0 20060810
> [  129.877658] pci 0000:00:02.0: power state changed by ACPI to D0
> [  129.877678] pci 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
> [  129.877687] pci 0000:00:02.0: setting latency timer to 64
> [  129.934945] pci 0000:00:02.0: irq 30 for MSI/MSI-X
> [  129.935021] [drm] Initialized i915 1.6.0 20080730 on minor 0
> [  129.988541] [drm:i915_initialize] *ERROR* can not ioremap virtual address for ring buffer

This is bad -- without the ringbuffer, initialization fails, so the DRM
support for opregion shouldn't work.

There have been fixes in later kernels for ioremap issues, which may or
may not affect what you're seeing.  Also, are you using KMS or not?

-- 
Eric Anholt
eric@...olt.net                         eric.anholt@...el.com



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