On Wed, May 27, 2015 at 06:46:05PM -0500, Mario Limonciello wrote:
>
>
> On 05/27/2015 02:37 PM, Limonciello, Mario wrote:
> >These events are outputted via the keyboard controller.
> >Right now the only actionable event is to restart the system
> >if the cable is removed, but the others are documented in
> >case they will be bubbled up to other parts of the kernel or
> >userspace later on.
> >
> >Signed-off-by: Mario Limonciello <mario_limoncie...@dell.com>
> >---
> > drivers/platform/x86/Kconfig | 1 +
> > drivers/platform/x86/alienware-wmi.c | 45
> > ++++++++++++++++++++++++++++++++++++
> > 2 files changed, 46 insertions(+)
> >
> >diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
> >index f9f205c..8a7bd7c 100644
> >--- a/drivers/platform/x86/Kconfig
> >+++ b/drivers/platform/x86/Kconfig
> >@@ -60,6 +60,7 @@ config ALIENWARE_WMI
> > depends on LEDS_CLASS
> > depends on NEW_LEDS
> > depends on ACPI_WMI
> >+ depends on SERIO_I8042
> > ---help---
> > This is a driver for controlling Alienware BIOS driven
> > features. It exposes an interface for controlling the AlienFX
> >diff --git a/drivers/platform/x86/alienware-wmi.c
> >b/drivers/platform/x86/alienware-wmi.c
> >index 5bd8faf..ffccbd9 100644
> >--- a/drivers/platform/x86/alienware-wmi.c
> >+++ b/drivers/platform/x86/alienware-wmi.c
> >@@ -23,6 +23,8 @@
> > #include <linux/dmi.h>
> > #include <linux/acpi.h>
> > #include <linux/leds.h>
> >+#include <linux/i8042.h>
> >+#include <linux/reboot.h>
> > #define LEGACY_CONTROL_GUID
> > "A90597CE-A997-11DA-B012-B622A1EF5492"
> > #define LEGACY_POWER_CONTROL_GUID "A80593CE-A997-11DA-B012-B622A1EF5492"
> >@@ -650,6 +652,44 @@ error_create_amplifier:
> > return ret;
> > }
> >+static bool alienware_i8042_filter(unsigned char data, unsigned char str,
> >+ struct serio *port)
> >+{
> >+ static bool extended;
> >+
> >+ if (str & I8042_STR_AUXDATA)
> >+ return false;
> >+
> >+ if (unlikely(data == 0xe0)) {
> >+ extended = true;
> >+ return false;
> >+ } else if (unlikely(extended)) {
> >+ switch (data) {
> >+ /*Connect */
> >+ case 0x3F:
> >+ pr_debug("Received connect event\n");
> >+ break;
> >+ /* Disconnect by hotkey */
> >+ case 0x40:
> >+ pr_debug("Received disconnect hotkey event\n");
> >+ break;
> >+ /*disconnect by cable undock button */
> >+ case 0x41:
> >+ pr_debug("Received disconnect button event\n");
> >+ break;
> >+ /* surprise disconnect */
> >+ case 0x42:
> >+ pr_crit("Graphics amplifier removed, initiating
> >reboot.\n");
> >+ emergency_restart();
>
> I had some discussion with someone in #systemd. Just to clarify why the
> reboot is needed I wanted to mention it here.
> X does continue to run and the kernel doesn't panic, but the GPU drivers
> gets stuck in a hung state.
Then fix the GPU drivers.
> Restarting X or plugging the cable back in doesn't actually fix it.
Fix the GPU drivers.
> Since you just pulled your U/I from under yourself you don't really have a
> way to message what happened, or to fix this other than restarting the
> system.
Fix the GPU drivers.
> I also later discovered that this should probably be:
>
> orderly_reboot();
Nope, fix the GPU drivers.
> I'll resubmit with that change after any other discussion around iterating
> with this.
With a fix for the GPU drivers? Great, that's the only acceptable
solution.
thanks,
greg k-h
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