When CONFIG_ACPI_BUTTON=m (and probably when ACPI_BUTTON is not enabled) and NOUVEAU is built-in (not as a loadable module) the following error occurs during kernel compilation: nouveau_connector.c:(.text+0xe17ce): undefined reference to `acpi_lid_open' Looks like this bug has been noted upstream and there are some solutions. They may be seen here http://www.mail-archive.com/dri-devel@lists.sourceforge.net/msg47619.html and here https://patchwork.kernel.org/patch/101787/ It seems like the final one fixes the problem. Maybe this patch is worth being added to the Portage? Reproducible: Always Steps to Reproduce: 1. Emerge gentoo-sources-2.6.34 2. set CONFIG_ACPI_BUTTON=m AND CONFIG_DRM_NOUVEAU=y 3. try to 'make' the kernel Actual Results: Gives an error during build: nouveau_connector.c:(.text+0xe17ce): undefined reference to `acpi_lid_open' Expected Results: Should compile and link fine. :)
Released in gentoo-sources-2.6.34-r1