* Melchior FRANZ -- Tuesday 26 April 2011: > [https://bugzilla.kernel.org/show_bug.cgi?id=31522] I've replied to this error message, but here again for this audience: The commit that broke all 2.6.38.* releases for my machine is this: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=ba3820ade317ee36e496b9b40d2ec3987dd4aef0 (Takashi Iwai: "drm/i915: Revive combination mode for backlight control"). In 'is_backlight_combination_mode()' INTEL_INFO(dev)->gen equals 4, and the function returns 0x40000000 in "combination mode". In 'intel_panel_get_backlight()' this happens: val = I915_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; // val = 0x0b4a if (IS_PINEVIEW(dev)) // false val >>= 1; if (is_backlight_combination_mode(dev)){ u8 lbpc; val &= ~1; // val = 0x0b4a pci_read_config_byte(dev->pdev, PCI_LBPC, &lbpc); // lbpc = 0 val *= lbpc; // val = 0 } The backlight remains off and does also not react to the "brighter" key event. Reverting the patch fixes my system, obviously. m. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
