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
[email protected] [email protected]
Success! Hooray!
Eric Anholt [Mon, Mar 09, 2009 at 07:28:11PM -0700]:
> > [ 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?
I just gave the lates iwlwifi tree a try, now running
2.6.29-rc7-wl-ikn-32831-g98c5597, which has full
brightness again.
I'm quite happy that it works again, but quite unhappy
to have it solved "silently"...
--
Think about Free and Open Source Software (FOSS).
http://nico.schottelius.org/documentations/foss/the-term-foss/
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