[GIT PATCH] thinkpad-acpi fixes for 2.6.32-rc2

[GIT PATCH] thinkpad-acpi fixes for 2.6.32-rc2

[Henrique de Moraes Holschuh]

Len,

This patchset fixes a few problems that have been reported,
including the annoying build problem reported by Ingo.

It mostly updates the new ALSA functionality to be better
behaved, and makes it optional for people who could care
less for on-screen-display of volume hotkeys and would
rather have a kernel that is a few kiB smaller.

Please apply.

Thanks.

Shortlog:
Henrique de Moraes Holschuh (5):
      thinkpad-acpi: don't take the first ALSA slot by default
      thinkpad-acpi: don't fail to load the entire module due to ALSA problems
      thinkpad-acpi: make volume subdriver optional
      thinkpad-acpi: update volume documentation
      thinkpad-acpi: improve Kconfig help text

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh

[PATCH 1/5] thinkpad-acpi: don't take the first ALSA slot by default

[Henrique de Moraes Holschuh]

We don't want to be the first soundcard.  We don't want to shift other
soundcards out of the way either, even if they load much later.

Ask ALSA to (by default) load us in one of the last three slots.  This
can be overriden at will using the "index" parameter.

Reported-by: Whoopie <whoopie79@gmx.net>
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
---
 drivers/platform/x86/thinkpad_acpi.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 448c8ae..3311b00 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -6388,7 +6388,7 @@ static struct ibm_struct brightness_driver_data = {
 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
 
-static int alsa_index = SNDRV_DEFAULT_IDX1;
+static int alsa_index = ~((1 << (SNDRV_CARDS - 3)) - 1); /* last three slots */
 static char *alsa_id = "ThinkPadEC";
 static int alsa_enable = SNDRV_DEFAULT_ENABLE1;
 
-- 
1.6.5.7

[PATCH 2/5] thinkpad-acpi: don't fail to load the entire module due to ALSA problems

[Henrique de Moraes Holschuh]

If we cannot create the ALSA mixer, it is a good reason to fail to
load the volume subdriver, and not to fail to load the entire module.

While at it, add more debugging messages, as the error paths are being
used a lot more than I'd expect, and it is failing to set up the ALSA
mixer on a number of ThinkPads.

Reported-by: Peter Jordan <usernetwork@gmx.info>
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
---
 drivers/platform/x86/thinkpad_acpi.c |   31 ++++++++++++++++++-------------
 1 files changed, 18 insertions(+), 13 deletions(-)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 3311b00..9b7da9c 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -6705,10 +6705,11 @@ static int __init volume_create_alsa_mixer(void)
 
 	rc = snd_card_create(alsa_index, alsa_id, THIS_MODULE,
 			    sizeof(struct tpacpi_alsa_data), &card);
-	if (rc < 0)
-		return rc;
-	if (!card)
-		return -ENOMEM;
+	if (rc < 0 || !card) {
+		printk(TPACPI_ERR
+			"Failed to create ALSA card structures: %d\n", rc);
+		return 1;
+	}
 
 	BUG_ON(!card->private_data);
 	data = card->private_data;
@@ -6741,8 +6742,9 @@ static int __init volume_create_alsa_mixer(void)
 		rc = snd_ctl_add(card, ctl_vol);
 		if (rc < 0) {
 			printk(TPACPI_ERR
-				"Failed to create ALSA volume control\n");
-			goto err_out;
+				"Failed to create ALSA volume control: %d\n",
+				rc);
+			goto err_exit;
 		}
 		data->ctl_vol_id = &ctl_vol->id;
 	}
@@ -6750,22 +6752,25 @@ static int __init volume_create_alsa_mixer(void)
 	ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL);
 	rc = snd_ctl_add(card, ctl_mute);
 	if (rc < 0) {
-		printk(TPACPI_ERR "Failed to create ALSA mute control\n");
-		goto err_out;
+		printk(TPACPI_ERR "Failed to create ALSA mute control: %d\n",
+			rc);
+		goto err_exit;
 	}
 	data->ctl_mute_id = &ctl_mute->id;
 
 	snd_card_set_dev(card, &tpacpi_pdev->dev);
 	rc = snd_card_register(card);
-
-err_out:
 	if (rc < 0) {
-		snd_card_free(card);
-		card = NULL;
+		printk(TPACPI_ERR "Failed to register ALSA card: %d\n", rc);
+		goto err_exit;
 	}
 
 	alsa_card = card;
-	return rc;
+	return 0;
+
+err_exit:
+	snd_card_free(card);
+	return 1;
 }
 
 #define TPACPI_VOL_Q_MUTEONLY	0x0001	/* Mute-only control available */
-- 
1.6.5.7

[PATCH 3/5] thinkpad-acpi: make volume subdriver optional

[Henrique de Moraes Holschuh]

Allow the user to choose through Kconfig if the Console Audio Control
interface (aka "volume subdriver") should be available or not.

This not only saves some memory, but also allows the thinkpad-acpi
driver to be built-in even if ALSA is modular when the console audio
control interface is not wanted.

This change fixes a build problem that is causing some annoyances, in
a way that doesn't disable the entire driver on kernels without ALSA
support.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Amerigo Wang <amwang@redhat.com>
Cc: Helight Xu <helight.xu@gmail.com>
Cc: Takashi Iwai <tiwai@suse.de>
---
 drivers/platform/x86/Kconfig         |   23 +++++++++++++++++++++++
 drivers/platform/x86/thinkpad_acpi.c |   26 ++++++++++++++++++++++++++
 2 files changed, 49 insertions(+), 0 deletions(-)

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index ec4faff..2462dc3 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -233,6 +233,29 @@ config THINKPAD_ACPI
 
 	  If you have an IBM or Lenovo ThinkPad laptop, say Y or M here.
 
+config THINKPAD_ACPI_ALSA_SUPPORT
+	bool "Console audio control ALSA interface"
+	depends on THINKPAD_ACPI
+	depends on SND
+	depends on SND = y || THINKPAD_ACPI = SND
+	default y
+	---help---
+	  Enables monitoring of the built-in console audio output control
+	  (headphone and speakers), which is operated by the mute and (in
+	  some ThinkPad models) volume hotkeys.
+
+	  If this option is enabled, ThinkPad-ACPI will export an ALSA card
+	  with a single read-only mixer control, which should be used for
+	  on-screen-display feedback purposes by the Desktop Environment.
+
+	  Optionally, the driver will also allow software control (the
+	  ALSA mixer will be made read-write).  Please refer to the driver
+	  documentation for details.
+
+	  All IBM models have both volume and mute control.  Newer Lenovo
+	  models only have mute control (the volume hotkeys are just normal
+	  keys and volume control is done through the main HDA mixer).
+
 config THINKPAD_ACPI_DEBUGFACILITIES
 	bool "Maintainer debug facilities"
 	depends on THINKPAD_ACPI
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 9b7da9c..e67e4fe 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -6384,6 +6384,8 @@ static struct ibm_struct brightness_driver_data = {
  * and we leave them unchanged.
  */
 
+#ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
+
 #define TPACPI_ALSA_DRVNAME  "ThinkPad EC"
 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
@@ -7021,6 +7023,28 @@ static struct ibm_struct volume_driver_data = {
 	.shutdown = volume_shutdown,
 };
 
+#else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
+
+#define alsa_card NULL
+
+static void inline volume_alsa_notify_change(void)
+{
+}
+
+static int __init volume_init(struct ibm_init_struct *iibm)
+{
+	printk(TPACPI_INFO
+		"volume: disabled as there is no ALSA support in this kernel\n");
+
+	return 1;
+}
+
+static struct ibm_struct volume_driver_data = {
+	.name = "volume",
+};
+
+#endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
+
 /*************************************************************************
  * Fan subdriver
  */
@@ -8743,6 +8767,7 @@ MODULE_PARM_DESC(hotkey_report_mode,
 		 "used for backwards compatibility with userspace, "
 		 "see documentation");
 
+#ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
 module_param_named(volume_mode, volume_mode, uint, 0444);
 MODULE_PARM_DESC(volume_mode,
 		 "Selects volume control strategy: "
@@ -8765,6 +8790,7 @@ module_param_named(id, alsa_id, charp, 0444);
 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
 module_param_named(enable, alsa_enable, bool, 0444);
 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
+#endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
 
 #define TPACPI_PARAM(feature) \
 	module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
-- 
1.6.5.7

[PATCH 4/5] thinkpad-acpi: update volume documentation

[Henrique de Moraes Holschuh]

Update the volume subdriver documentation.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
---
 Documentation/laptops/thinkpad-acpi.txt |   58 ++++++++++++++++++++++++++----
 1 files changed, 50 insertions(+), 8 deletions(-)

diff --git a/Documentation/laptops/thinkpad-acpi.txt b/Documentation/laptops/thinkpad-acpi.txt
index 169091f..75afa12 100644
--- a/Documentation/laptops/thinkpad-acpi.txt
+++ b/Documentation/laptops/thinkpad-acpi.txt
@@ -1092,8 +1092,8 @@ WARNING:
     its level up and down at every change.
 
 
-Volume control
---------------
+Volume control (Console Audio control)
+--------------------------------------
 
 procfs: /proc/acpi/ibm/volume
 ALSA: "ThinkPad Console Audio Control", default ID: "ThinkPadEC"
@@ -1110,9 +1110,53 @@ the desktop environment to just provide on-screen-display feedback.
 Software volume control should be done only in the main AC97/HDA
 mixer.
 
-This feature allows volume control on ThinkPad models with a digital
-volume knob (when available, not all models have it), as well as
-mute/unmute control.  The available commands are:
+
+About the ThinkPad Console Audio control:
+
+ThinkPads have a built-in amplifier and muting circuit that drives the
+console headphone and speakers.  This circuit is after the main AC97
+or HDA mixer in the audio path, and under exclusive control of the
+firmware.
+
+ThinkPads have three special hotkeys to interact with the console
+audio control: volume up, volume down and mute.
+
+It is worth noting that the normal way the mute function works (on
+ThinkPads that do not have a "mute LED") is:
+
+1. Press mute to mute.  It will *always* mute, you can press it as
+   many times as you want, and the sound will remain mute.
+
+2. Press either volume key to unmute the ThinkPad (it will _not_
+   change the volume, it will just unmute).
+
+This is a very superior design when compared to the cheap software-only
+mute-toggle solution found on normal consumer laptops:  you can be
+absolutely sure the ThinkPad will not make noise if you press the mute
+button, no matter the previous state.
+
+The IBM ThinkPads, and the earlier Lenovo ThinkPads have variable-gain
+amplifiers driving the speakers and headphone output, and the firmware
+also handles volume control for the headphone and speakers on these
+ThinkPads without any help from the operating system (this volume
+control stage exists after the main AC97 or HDA mixer in the audio
+path).
+
+The newer Lenovo models only have firmware mute control, and depend on
+the main HDA mixer to do volume control (which is done by the operating
+system).  In this case, the volume keys are filtered out for unmute
+key press (there are some firmware bugs in this area) and delivered as
+normal key presses to the operating system (thinkpad-acpi is not
+involved).
+
+
+The ThinkPad-ACPI volume control:
+
+The preferred way to interact with the Console Audio control is the
+ALSA interface.
+
+The legacy procfs interface allows one to read the current state,
+and if volume control is enabled, accepts the following commands:
 
 	echo up   >/proc/acpi/ibm/volume
 	echo down >/proc/acpi/ibm/volume
@@ -1121,12 +1165,10 @@ mute/unmute control.  The available commands are:
 	echo 'level <level>' >/proc/acpi/ibm/volume
 
 The <level> number range is 0 to 14 although not all of them may be
-distinct. The unmute the volume after the mute command, use either the
+distinct. To unmute the volume after the mute command, use either the
 up or down command (the level command will not unmute the volume), or
 the unmute command.
 
-The current volume level and mute state is shown in the file.
-
 You can use the volume_capabilities parameter to tell the driver
 whether your thinkpad has volume control or mute-only control:
 volume_capabilities=1 for mixers with mute and volume control,
-- 
1.6.5.7

[PATCH 5/5] thinkpad-acpi: improve Kconfig help text

[Henrique de Moraes Holschuh]

Document that rfkill and ALSA functionality exists, but requires the
subsystems to be available, and not modular if thinkpad-acpi is not
modular.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
---
 drivers/platform/x86/Kconfig |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 2462dc3..db32c25 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -231,6 +231,11 @@ config THINKPAD_ACPI
 
 	  This driver was formerly known as ibm-acpi.
 
+	  Extra functionality will be available if the rfkill (CONFIG_RFKILL)
+	  and/or ALSA (CONFIG_SND) subsystems are available in the kernel.
+	  Note that if you want ThinkPad-ACPI to be built-in instead of
+	  modular, ALSA and rfkill will also have to be built-in.
+
 	  If you have an IBM or Lenovo ThinkPad laptop, say Y or M here.
 
 config THINKPAD_ACPI_ALSA_SUPPORT
-- 
1.6.5.7

Re: [GIT PATCH] thinkpad-acpi fixes for 2.6.32-rc2

[Len Brown]

applied to acpi-test

thanks,
Len Brown, Intel Open Source Technology Center

On Sat, 26 Dec 2009, Henrique de Moraes Holschuh wrote:

> Len,
> 
> This patchset fixes a few problems that have been reported,
> including the annoying build problem reported by Ingo.
> 
> It mostly updates the new ALSA functionality to be better
> behaved, and makes it optional for people who could care
> less for on-screen-display of volume hotkeys and would
> rather have a kernel that is a few kiB smaller.
> 
> Please apply.
> 
> Thanks.
> 
> Shortlog:
> Henrique de Moraes Holschuh (5):
>       thinkpad-acpi: don't take the first ALSA slot by default
>       thinkpad-acpi: don't fail to load the entire module due to ALSA problems
>       thinkpad-acpi: make volume subdriver optional
>       thinkpad-acpi: update volume documentation
>       thinkpad-acpi: improve Kconfig help text
> 
> -- 
>   "One disk to rule them all, One disk to find them. One disk to bring
>   them all and in the darkness grind them. In the Land of Redmond
>   where the shadows lie." -- The Silicon Valley Tarot
>   Henrique Holschuh
> --
> To unsubscribe from this list: send the line "unsubscribe linux-acpi" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 

Re: [PATCH 3/5] thinkpad-acpi: make volume subdriver optional

[Takashi Iwai]

At Sat, 26 Dec 2009 22:52:15 -0200,
Henrique de Moraes Holschuh wrote:
> 
> Allow the user to choose through Kconfig if the Console Audio Control
> interface (aka "volume subdriver") should be available or not.
> 
> This not only saves some memory, but also allows the thinkpad-acpi
> driver to be built-in even if ALSA is modular when the console audio
> control interface is not wanted.
> 
> This change fixes a build problem that is causing some annoyances, in
> a way that doesn't disable the entire driver on kernels without ALSA
> support.
> 
> Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
> Cc: Ingo Molnar <mingo@elte.hu>
> Cc: Amerigo Wang <amwang@redhat.com>
> Cc: Helight Xu <helight.xu@gmail.com>
> Cc: Takashi Iwai <tiwai@suse.de>
> ---
>  drivers/platform/x86/Kconfig         |   23 +++++++++++++++++++++++
>  drivers/platform/x86/thinkpad_acpi.c |   26 ++++++++++++++++++++++++++
>  2 files changed, 49 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
> index ec4faff..2462dc3 100644
> --- a/drivers/platform/x86/Kconfig
> +++ b/drivers/platform/x86/Kconfig
> @@ -233,6 +233,29 @@ config THINKPAD_ACPI
>  
>  	  If you have an IBM or Lenovo ThinkPad laptop, say Y or M here.
>  
> +config THINKPAD_ACPI_ALSA_SUPPORT
> +	bool "Console audio control ALSA interface"
> +	depends on THINKPAD_ACPI
> +	depends on SND
> +	depends on SND = y || THINKPAD_ACPI = SND

I think the first "depends on SND" is superfluous.
But it's no any important issue.

Acked-by: Takashi Iwai <tiwai@suse.de>


thanks,

Takashi

> +	default y
> +	---help---
> +	  Enables monitoring of the built-in console audio output control
> +	  (headphone and speakers), which is operated by the mute and (in
> +	  some ThinkPad models) volume hotkeys.
> +
> +	  If this option is enabled, ThinkPad-ACPI will export an ALSA card
> +	  with a single read-only mixer control, which should be used for
> +	  on-screen-display feedback purposes by the Desktop Environment.
> +
> +	  Optionally, the driver will also allow software control (the
> +	  ALSA mixer will be made read-write).  Please refer to the driver
> +	  documentation for details.
> +
> +	  All IBM models have both volume and mute control.  Newer Lenovo
> +	  models only have mute control (the volume hotkeys are just normal
> +	  keys and volume control is done through the main HDA mixer).
> +
>  config THINKPAD_ACPI_DEBUGFACILITIES
>  	bool "Maintainer debug facilities"
>  	depends on THINKPAD_ACPI
> diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
> index 9b7da9c..e67e4fe 100644
> --- a/drivers/platform/x86/thinkpad_acpi.c
> +++ b/drivers/platform/x86/thinkpad_acpi.c
> @@ -6384,6 +6384,8 @@ static struct ibm_struct brightness_driver_data = {
>   * and we leave them unchanged.
>   */
>  
> +#ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
> +
>  #define TPACPI_ALSA_DRVNAME  "ThinkPad EC"
>  #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control"
>  #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME
> @@ -7021,6 +7023,28 @@ static struct ibm_struct volume_driver_data = {
>  	.shutdown = volume_shutdown,
>  };
>  
> +#else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
> +
> +#define alsa_card NULL
> +
> +static void inline volume_alsa_notify_change(void)
> +{
> +}
> +
> +static int __init volume_init(struct ibm_init_struct *iibm)
> +{
> +	printk(TPACPI_INFO
> +		"volume: disabled as there is no ALSA support in this kernel\n");
> +
> +	return 1;
> +}
> +
> +static struct ibm_struct volume_driver_data = {
> +	.name = "volume",
> +};
> +
> +#endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
> +
>  /*************************************************************************
>   * Fan subdriver
>   */
> @@ -8743,6 +8767,7 @@ MODULE_PARM_DESC(hotkey_report_mode,
>  		 "used for backwards compatibility with userspace, "
>  		 "see documentation");
>  
> +#ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
>  module_param_named(volume_mode, volume_mode, uint, 0444);
>  MODULE_PARM_DESC(volume_mode,
>  		 "Selects volume control strategy: "
> @@ -8765,6 +8790,7 @@ module_param_named(id, alsa_id, charp, 0444);
>  MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer");
>  module_param_named(enable, alsa_enable, bool, 0444);
>  MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
> +#endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
>  
>  #define TPACPI_PARAM(feature) \
>  	module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
> -- 
> 1.6.5.7
> 

Re: [PATCH 3/5] thinkpad-acpi: make volume subdriver optional

[Henrique de Moraes Holschuh]

On Sun, 27 Dec 2009, Takashi Iwai wrote:
> > +config THINKPAD_ACPI_ALSA_SUPPORT
> > +	bool "Console audio control ALSA interface"
> > +	depends on THINKPAD_ACPI
> > +	depends on SND
> > +	depends on SND = y || THINKPAD_ACPI = SND
> 
> I think the first "depends on SND" is superfluous.

Yes, but I felt that it wouldn't get the idea across as nicely (to humans,
Kconfig obviously could care less).

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh

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Re: [PATCH 3/5] thinkpad-acpi: make volume subdriver optional

[Ian Molton]

Not directly related to your patch but I thought I'd mention...

I've noticed issues with my X200 re: routing audio before / after docking.

I'll investigate if I can provoke it and will let you know.

Re: [PATCH 3/5] thinkpad-acpi: make volume subdriver optional

[Henrique de Moraes Holschuh]

On Sun, 27 Dec 2009, Ian Molton wrote:
> Not directly related to your patch but I thought I'd mention...
> 
> I've noticed issues with my X200 re: routing audio before / after docking.

ThinkPads used to route line-out to the dock, with a fixed 1.1dB amplifier
(0.1dB increase) in the audio path, and had the volume control for
headphones and speakers done in a different audio path, extracted before the
line-out amplifier.  The PeeCee beeper channel was routed to the headphones
and speakers, only.

If Lenovo tried to reproduce that with the HDA mixer but without the "Laptop
Apudio Controller" the IBM thinkpads had, I wouldn't be surprised if it
causes massive ALSA disruption should the firmware screw with the HDA mixer
registers behind ALSA's back.  Try asking the kernel to enable OSI(Linux) in
ACPI...  I always forget the kernel command line parameter to do that, but
it is documented in the usual place.

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh

Re: [PATCH 5/5] thinkpad-acpi: improve Kconfig help text

[tytso]

On Sat, Dec 26, 2009 at 10:52:17PM -0200, Henrique de Moraes Holschuh wrote:
> +	  Extra functionality will be available if the rfkill (CONFIG_RFKILL)
> +	  and/or ALSA (CONFIG_SND) subsystems are available in the kernel.
> +	  Note that if you want ThinkPad-ACPI to be built-in instead of
> +	  modular, ALSA and rfkill will also have to be built-in.

By the way, just as a point of information, Ubuntu Karmic seems to
have some kind of bug with their sound system (I suspect their
Pulseaudio integration) which cases sound to be completely
non-functional if ALSA is built in.  I had to build ALSA as modules in
order for Ubuntu to work correctly.

						- Ted

Re: [PATCH 5/5] thinkpad-acpi: improve Kconfig help text

[Henrique de Moraes Holschuh]

On Mon, 28 Dec 2009, tytso@mit.edu wrote:
> By the way, just as a point of information, Ubuntu Karmic seems to
> have some kind of bug with their sound system (I suspect their
> Pulseaudio integration) which cases sound to be completely
> non-functional if ALSA is built in.  I had to build ALSA as modules in
> order for Ubuntu to work correctly.

Maybe they are depending on module parameters for it to work, and adding
those automagically behind your back in the modprobe.d config stuff but
ignoring the kernel command line?

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh

Re: [PATCH 3/5] thinkpad-acpi: make volume subdriver optional

[Jerone Young]

On Mon, 2009-12-28 at 11:17 -0200, Henrique de Moraes Holschuh wrote:
> On Sun, 27 Dec 2009, Ian Molton wrote:
> > Not directly related to your patch but I thought I'd mention...
> > 
> > I've noticed issues with my X200 re: routing audio before / after docking.
> 
> ThinkPads used to route line-out to the dock, with a fixed 1.1dB amplifier
> (0.1dB increase) in the audio path, and had the volume control for
> headphones and speakers done in a different audio path, extracted before the
> line-out amplifier.  The PeeCee beeper channel was routed to the headphones
> and speakers, only.
> 
> If Lenovo tried to reproduce that with the HDA mixer but without the "Laptop
> Apudio Controller" the IBM thinkpads had, I wouldn't be surprised if it
> causes massive ALSA disruption should the firmware screw with the HDA mixer
> registers behind ALSA's back.  Try asking the kernel to enable OSI(Linux) in
> ACPI...  I always forget the kernel command line parameter to do that, but
> it is documented in the usual place.

"acpi_osi=Linux" is the kernel command line param your looking for.

> 



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Re: [PATCH 5/5] thinkpad-acpi: improve Kconfig help text

[tytso]

On Mon, Dec 28, 2009 at 11:35:22AM -0200, Henrique de Moraes Holschuh wrote:
> On Mon, 28 Dec 2009, tytso@mit.edu wrote:
> > By the way, just as a point of information, Ubuntu Karmic seems to
> > have some kind of bug with their sound system (I suspect their
> > Pulseaudio integration) which cases sound to be completely
> > non-functional if ALSA is built in.  I had to build ALSA as modules in
> > order for Ubuntu to work correctly.
> 
> Maybe they are depending on module parameters for it to work, and adding
> those automagically behind your back in the modprobe.d config stuff but
> ignoring the kernel command line?

For a T400?  I don't think so.  #1, the only thing in /etc/modprobe.d
is:

options snd-hda-intel power_save=10 power_save_controller=N

#2, building sound into the kernel worked fine with Ubuntu Jaunty; the
exact same kernel broke when I upgraded the userspace to Ubuntu
Karmic.

						- Ted