On Mon, Dec 05, 2011 at 11:00:41AM +0800, joeyli wrote:
Add Cc. to platform-driver-x86 and linux-acpi
Hi Baptiste
於 日，2011-12-04 於 17:07 +0100，Baptiste Jonglez 提到：
Hi,
I've got a lot of troubles with a dual-LVDS Acer laptop (it doesn't have a keyboard, but two displays with touchscreens)
The Intel GPU is integrated into the Core i5-480M CPU: it's a bit older than Sandybridge, as it seems to be based on the Arrandale micro-architecture.
In the BIOS, both displays work fine; but as soon as the kernel boots up, the second display (i.e. the one where you usually find a keyboard) is turned off. The main display works as expected.
xrandr reports two LVDS displays: LVDS1, which is connected, and LVDS2, which is marked as "disconnected". No matter what I tried, I can't bring that second display up.
During the boot, just after the drm is set up, the following message shows up:
[drm:intel_dsm_pci_probe] *ERROR* failed to get supported _DSM functions
(attached is the relevant part of dmesg [1])
The second screen works fine with the attached patch. It actually is 6 months old but seems to have been lost in the wild...
Thanks Benjamin!
There is still the issue of unhandled acer-wmi events, but it's far less incapacitating. I wonder what's the best way to report events to userspace, though (e.g. for the "keyboard" button, userspace might want to know when it is pressed in order to display a virtual keyboard or any other fancy stuff)
Joey, if you need more logs for acer-wmi, I'll be happy to provide.
Baptiste