ThinkWiki - User contributions [en]

How to get special keys to work

2005-12-11T00:51:56Z

64.92.165.10:

==Overview==
{| border="1" cellspacing="0" cellpadding="2"
! key !! standard function !! tools supporting key{{footnote|1}} !! configurability{{footnote|2}} !! remarks
|-
| {{key|Fn}} || - || [[#xmodmap configuration|xmodmap]], [[#tpb configuration|tpb]] || full || on release without completed key combination
|-
| {{key|Fn}}{{key|F1}} || - || [[#ibm-acpi events|ibm-acpi]] || full ||
|-
| {{key|Fn}}{{key|F2}} || - || [[#ibm-acpi events|ibm-acpi]] || full ||
|-
| {{key|Fn}}{{key|F3}} || blank screen || [[#ibm-acpi events|ibm-acpi]], [[thinkpad-acpi]] || full ||
|-
| {{key|Fn}}{{key|F4}} || suspend to ram || [[#ibm-acpi events|ibm-acpi]], [[thinkpad-acpi]] || full ||
|-
| {{key|Fn}}{{key|F5}} || switch bluetooth || [[#ibm-acpi events|ibm-acpi]], [[thinkpad-acpi]] || full || in models starting from 2002
|-
| {{key|Fn}}{{key|F6}} || - || [[#ibm-acpi events|ibm-acpi]] || full ||
|-
| {{key|Fn}}{{key|F7}} || switch display || [[#ibm-acpi events|ibm-acpi]], [[thinkpad-acpi]], [[#tpb configuration|tpb]] || additional actions ||
|-
| {{key|Fn}}{{key|F8}} || toggle display expansion || [[#ibm-acpi events|ibm-acpi]], [[thinkpad-acpi]], [[#tpb configuration|tpb]] || additional actions ||
|-
| {{key|Fn}}{{key|F9}} || eject from dock || [[#ibm-acpi events|ibm-acpi]], [[thinkpad-acpi]] || full ||
|-
| {{key|Fn}}{{key|F10}} || - || [[#ibm-acpi events|ibm-acpi]] || full ||
|-
| {{key|Fn}}{{key|F11}} || - || [[#ibm-acpi events|ibm-acpi]] || full ||
|-
| {{key|Fn}}{{key|F12}} || hibernate || [[#ibm-acpi events|ibm-acpi]], [[thinkpad-acpi]] || full ||
|-
| {{key|Fn}}{{key|Pos1}} || brightness up || [[#ibm-acpi events|ibm-acpi]], [[#tpb configuration|tpb]] || additional actions ||
|-
| {{key|Fn}}{{key|End}} || brightness down || [[#tpb configuration|tpb]] || additional actions ||
|-
| {{key|Fn}}{{key|PageUp}} || toggle thinklight || [[#tpb configuration|tpb]] || additional actions ||
|-
| {{key|Fn}}{{key|Space}} || toggle zoom || [[#tpb configuration|tpb]] || full ||
|-
| {{key|Fn}}{{key|Ins}} || - || [[#ibm-acpi events|ibm-acpi]] || full ||
|-
| {{key|Fn}}{{key|Del}} || - || [[#ibm-acpi events|ibm-acpi]] || full ||
|-
| {{key|Fn}}{{key|Backspace}} || - || [[#ibm-acpi events|ibm-acpi]] || full ||
|-
| {{ibmkey|Access IBM|#495988}} or {{ibmkey|ThinkPad|#494949}} || help application || [[#tpb configuration|tpb]] || full ||
|-
| {{ibmkey|Home|#494949}} || open web browser || [[#xmodmap configuration|xmodmap]], [[#tpb configuration|tpb]] || full || only {{A30}}, {{A30p}}, {{A31}}, {{A31p}} and ext. keyboards
|-
| {{ibmkey|Search|#494949}} || open search application || [[#xmodmap configuration|xmodmap]], [[#tpb configuration|tpb]] || full || only {{A30}}, {{A30p}}, {{A31}}, {{A31p}} and ext. keyboards
|-
| {{ibmkey|Mail|#494949}} || open mail application || [[#xmodmap configuration|xmodmap]], [[#tpb configuration|tpb]] || full || only {{A30}}, {{A30p}}, {{A31}}, {{A31p}} and ext. keyboards
|-
| {{ibmkey|Favorites|#494949}} || open favorites || [[#xmodmap configuration|xmodmap]], [[#tpb configuration|tpb]] || full || only {{A30}}, {{A30p}}, {{A31}}, {{A31p}} and ext. keyboards
|-
| {{ibmkey|Reload|#494949}} || reload web page || [[#xmodmap configuration|xmodmap]], [[#tpb configuration|tpb]] || full || only {{A30}}, {{A30p}}, {{A31}}, {{A31p}} and ext. keyboards
|-
| {{ibmkey|Abort|#494949}} || abort loading page || [[#xmodmap configuration|xmodmap]], [[#tpb configuration|tpb]] || full || only {{A30}}, {{A30p}}, {{A31}}, {{A31p}} and ext. keyboards
|-
| {{ibmkey|Backward|#494949}} || previous page || [[#xmodmap configuration|xmodmap]], [[#tpb configuration|tpb]] || full || ext. keyboards and Thinkpads starting from 2002
|-
| {{ibmkey|Forward|#494949}} || next page || [[#xmodmap configuration|xmodmap]], [[#tpb configuration|tpb]] || full || ext. keyboards and Thinkpads starting from 2002
|-
| {{ibmkey|Volume up|#494949}} || volume up || [[#tpb configuration|tpb]] || additional actions ||
|-
| {{ibmkey|Volume down|#494949}} || volume down || [[#tpb configuration|tpb]] || additional actions ||
|-
| {{ibmkey|Volume mute|#494949}} || mute volume || [[#tpb configuration|tpb]] || additional actions ||
|-
| {{ibmkey|Power|#494949}} || shutdown || [[#ibm-acpi events|ibm-acpi]] || full || triggered on pressing 3secs, but notebook goes off on 5sec press
|-
| Display lid || blank screen || [[#ibm-acpi events|ibm-acpi]] || full ||
|-
| Ultrabay lid || announce ultrabay change || [[#ibm-acpi events|ibm-acpi]] || full ||
|-
| Dock eject || eject from dock || [[#ibm-acpi events|ibm-acpi]] || full ||
|-
| {{ibmkey|Tablet power|#494949}} || shutdown || [[#ibm-acpi events|ibm-acpi]] || full || triggered on pressing 3secs, but notebook goes off on 5sec press
|-
| {{ibmkey|Tablet orientation|#494949}} || rotates screen || [[#Mapping keys with setkeycodes|setkeycodes]] || full ||
|-
| {{ibmkey|Tablet shortcut|#494949}} || shortcut menu || [[#Mapping keys with setkeycodes|setkeycodes]] || full ||
|-
| {{ibmkey|Tablet Esc|#494949}} || esc key || [[#Mapping keys with setkeycodes|setkeycodes]] || full ||
|-
| {{ibmkey|Tablet Enter|#494949}} || enter key || [[#mapping keys with setkeycodes|setkeycodes]] || full ||
|-
| {{ibmkey|Tablet Up|#494949}} || up key || [[#Mapping keys with setkeycodes|setkeycodes]] || full ||
|-
| {{ibmkey|Tablet Down|#494949}} || down key || [[#Mapping keys with setkeycodes|setkeycodes]] || full ||
|-
| {{ibmkey|Tablet (unlabeled)|#494949}} || down key || [[#Mapping keys with setkeycodes|setkeycodes]] || full ||
|}

==Triggering key events==
===ibm-acpi events===
Some of the following events require a {{cmdroot|echo enable,0xffff >/proc/acpi/ibm/hotkey}} in order to make acpi able to get information on them. These events can be used to [[How to configure acpid|configure acpid]].

{| border="1" cellspacing="0" cellpadding="2"
|+ events triggered by [[ibm-acpi]] for {{path|/etc/acpi/events}} files.
! key !! event
|-
| {{key|Fn}}{{key|F1}} || ibm/hotkey HKEY 00000080 00001001
|-
| {{key|Fn}}{{key|F2}} || ibm/hotkey HKEY 00000080 00001002
|-
| {{key|Fn}}{{key|F3}} || ibm/hotkey HKEY 00000080 00001003
|-
| {{key|Fn}}{{key|F4}} || ibm/hotkey HKEY 00000080 00001004
|-
| {{key|Fn}}{{key|F5}} || ibm/hotkey HKEY 00000080 00001005
|-
| {{key|Fn}}{{key|F6}} || ibm/hotkey HKEY 00000080 00001006
|-
| {{key|Fn}}{{key|F7}} || ibm/hotkey HKEY 00000080 00001007
|-
| {{key|Fn}}{{key|F8}} || ibm/hotkey HKEY 00000080 00001008
|-
| {{key|Fn}}{{key|F9}} || ibm/hotkey HKEY 00000080 00001009
|-
| {{key|Fn}}{{key|F10}} || ibm/hotkey HKEY 00000080 0000100a
|-
| {{key|Fn}}{{key|F11}} || ibm/hotkey HKEY 00000080 0000100b
|-
| {{key|Fn}}{{key|F12}} || ibm/hotkey HKEY 00000080 0000100c
|-
| {{key|Fn}}{{key|Backspace}} || ibm/hotkey HKEY 00000080 0000100d
|-
| {{key|Fn}}{{key|Ins}} || ibm/hotkey HKEY 00000080 0000100e
|-
| {{key|Fn}}{{key|Del}} || ibm/hotkey HKEY 00000080 0000100f
|-
| {{key|Fn}}{{key|Pos1}} || ibm/hotkey HKEY 00000080 00001010
|-
| {{ibmkey|Power|#494949}} || button/power PWRF 00000080 xxxxxxxx
|-
| Display lid || button/lid LID 00000080 xxxxxxxx
|-
| Ultrabay eject || ibm/bay MSTR 00000003 00000000
|-
| Ultrabay inserted || ibm/bay MSTR 00000001 00000000
|-
| Dock eject || ibm/dock GDCK 00000003 00000001
|}

===tpb configuration===
{| border="1" cellspacing="0" cellpadding="2"
|+ configuration keywords for [[tpb]] (to put in {{path|/etc/tpbrc}})
! key !! config keyword
|-
| {{ibmkey|Access IBM|#495988}} or {{ibmkey|ThinkPad|#494949}} || THINKPAD
|-
| {{ibmkey|Home|#494949}} || HOME
|-
| {{ibmkey|Search|#494949}} || SEARCH
|-
| {{ibmkey|Mail|#494949}} || MAIL
|-
| {{ibmkey|Favorites|#494949}} || FAVORITES
|-
| {{ibmkey|Reload|#494949}} || RELOAD
|-
| {{ibmkey|Abort|#494949}} || ABORT
|-
| {{ibmkey|Backward|#494949}} || BACKWARD
|-
| {{ibmkey|Forward|#494949}} || FORWARD
|-
| {{key|Fn}} || FN
|-
| {{key|Fn}}{{key|Space}} || CALLBACK (zoom on/off)
|-
| {{key|Fn}}{{key|PageUp}} || CALLBACK (thinklight on/off)
|-
| {{key|Fn}}{{key|F7}} || CALLBACK (display lcd/crt/both)
|-
| {{key|Fn}}{{key|F8}} || CALLBACK (expand on/off)
|-
| {{key|Fn}}{{key|Home}} || CALLBACK (brightness <percent>)
|-
| {{key|Fn}}{{key|End}} || CALLBACK (brightness <percent>)
|-
| {{ibmkey|Volume up|#494949}} || CALLBACK (volume <percent>)
|-
| {{ibmkey|Volume down|#494949}} || CALLBACK (volume <percent>)
|-
| {{ibmkey|Volume mute|#494949}} || CALLBACK (mute on/off)
|}

To all parameter keywords should be assigned the full path to the executables supposed to be started on key press.
The exectable provided for the CALLBACK keyword should take the parameters given in parentheses and act according to them.
If you want to use xmodmap for the HOME, SEARCH, MAIL, FAVORITES, RELOAD, ABORT, BACKWARD, FORWARD and FN keys you should
provide a <tt>XEVENTS=off</tt> in your {{path|/etc/tpbrc}}.

For Debian users, tpb is started from {{path|/etc/X11/Xsession.d/90tpb}}.

===xmodmap configuration===
xmodmap enables you to edit the modifier map and keymap tables that are used to translate keycodes into keysyms.
Understood? Well, basically it allows you to give the X server a dictionary for the translation of keycodes like "97" into more human readable synonyms like "Home". This way xmodmap allows you to make the special keys of your keyboard known to X applications.

Usually you should write your keycode-keysym associations into the file {{path|~/.Xmodmap}}. This file is usually read by the X session startup scripts of your system, so that the mappings automatically get included everytime you run the X server.

The {{path|~/.Xmodmap}} lines for our purpose are in the form of
keycode <keycode> = <keysym>

Load the assocation using the command

{{cmduser|xmodmap ~/.Xmodmap}}

(some configurations do this automatically upon X startup).

The following table shows the keycodes generated by the Thinkpad special keys and sensible keysyms to assign them to.
{| border="1" cellspacing="0" cellpadding="2"
|+ keycodes and recommended keysyms
! key !! keycode !! keysym
|-
| {{ibmkey|Backward|#494949}} || 234 || XF86Back or F21
|-
| {{ibmkey|Forward|#494949}} || 233 || XF86Forward or F22
|-
| {{ibmkey|Home|#494949}} || 178 || XF86HomePage
|-
| {{ibmkey|Search|#494949}} || 229 || XF86Search
|-
| {{ibmkey|Mail|#494949}} || 236 || XF86Mail
|-
| {{ibmkey|Favorites|#494949}} || 230 || XF86AddFavorite or XF86Favorites
|-
| {{ibmkey|Reload|#494949}} || 231 || XF86Reload
|-
| {{ibmkey|Abort|#494949}} || 232 || XF86Stop
|-
| {{key|Fn}} || 227 || F35
|}

(In case you want to use the browser keys in Firefox, you will have to assign the F21 and F22 or similar keysyms to them.)

Note: if you are running [[tpb]] you might need to add the line <tt>XEVENTS=off</tt> into your tpbrc to stop it from grabbing the key events and allow them to get through to X instead.

=====Using Caps Lock as Super L (Windows key)=====
You can easily use Caps Lock as Win key by adding the following in your ~/.Xmodmap:
! No Caps Lock
clear lock
! Caps Lock as Win key
add mod4 = Caps_Lock

===Mapping keys with setkeycodes===
You can use the setkeycodes command to remap certain keys. I.e. you can use {{cmdroot|setkeycodes 6e 109 6d 104 69 28 6b 1}} to map the Tablets Up and Down keys to the standard PageUp and PageDown keys and Tablet Escape and Enter to their respective keys.

The following table shows the keycodes generated by the ThinkPad keys.
{| border="1" cellspacing="0" cellpadding="2"
|+ keycodes
! key !! keycode
|-
| {{ibmkey|Tablet orientation|#494949}} || 0x6d
|-
| {{ibmkey|Tablet Shortcut|#494949}} || 0x6e
|-
| {{ibmkey|Tablet Esc|#494949}} || 0x6b
|-
| {{ibmkey|Tablet Enter|#494949}} || 0x69
|-
| {{ibmkey|Tablet Up|#494949}} || 0x68
|-
| {{ibmkey|Tablet Down|#494949}} || 0x6c
|-
| {{ibmkey|Tablet (unlabeled)|#494949}} || 0x67
|}

==Example Applications==
===Web Browsers===
====Firefox====
To have firefox make use of the browser keys you need to modify one of its files{{footnote|3}}.
To do this you will first need to extract it from the {{path|browser.jar}} archive. Do...

:{{cmdroot|cd <firefox-directory>/chrome}}<br />
:{{cmdroot|unzip browser.jar}}

The file of interest is {{path|content/browser/browser.xul}}. Edit it...
:{{cmdroot|vi content/browser/browser.xul}}

Look for the '''<keyset id="mainKeyset">''' section and add the following lines within...
<key id="goBackTP" keycode="VK_F21" command="Browser:Back" />
<key id="goForwardTP" keycode="VK_F22" command="Browser:Forward" />
Now save the file and repackage the {{path|browser.jar}} archive...
:{{cmdroot|zip -rD0 browser.jar content/browser/}}

That's it.

{{HINT|Another interesting Page on Firefox is http://dqd.com/~mayoff/notes/thinkpad/dqdnavkeys/ It uses different key mappings (F19 resp. F20) but a ready [http://dqd.com/~mayoff/notes/thinkpad/dqdnavkeys/dqdnavkeys-1.2.xpi .xpi] is provided which is pretty comfortable.}}

====Firefox and KDE====
KDE provides Khotkeys. Get into the KDE system controls (kcontrol) and just assign keyboard inputs "Alt+Left" and "Alt+Right" to the two browser keys. That way, you don't need to mess around with the firefox internals. Maybe, you'll need to set up {{path|~/.Xmodmap}} as described [[#xmodmap configuration|above]] in order to assign them the symbols XF86Back and XF86Forward.

====Opera====
However this isn't a simple configration file, you can set your browser manually.<br />
Go to <i>Tool > Settings > Mouse and keyboard > Keyboard settings > Edit > Browser Window</i>. There add F21 - Back and F22 - Forward. Now you can surf using your TP keys ;-)

===Window Managers===
====fvwm====
To get the {{ibmkey|Forward|#494949}} and {{ibmkey|Backward|#494949}} keys to cycle through pages in the virtual desktop, add this to your {{path|~/.fvwmrc}}:
Key XF86Back A A Scroll -100000 0
Key XF86Forward A A Scroll +100000 0
If you use multiple virtual desktops, you could instead use the keys to flip between them by using GotoDesk.

====pekwm configuration====
You can make the two browser keys switch workspaces in pekwm, by adding the following two lines to the {{path|~/.pekwm/keys}} file:
KeyPress = "Mod1 XF86Back" { Actions = "GoToWorkspace prev" }
KeyPress = "Mod1 XF86Forward" { Actions = "GoToWorkspace next" }

====pwm====
Another example how to use these two keys to switch between pwm tabs. These two lines should be added to {{path|~/.pwm/keys-default.conf}} or {{path|/etc/pwm/keys-default.conf}}:
kbind "Back", "switch_rot", -1
kbind "Forward", "switch_rot", 1

====icewm====
Some applications use {{key|Ctrl}}{{key|Left}} and {{key|Ctrl}}{{key|Right}} to set the cursor to the beginning of the previous / next word. In icewm, though, they're bound to previous / next workspace. Change these two options in {{path|~/.icewm/preferences}} to bind those to {{ibmkey|Forward|#494949}} and {{ibmkey|Backward|#494949}}: (Provided you assigned keysyms F21 and F22 with xmodmap)
# "Previous workspace" shortcut
KeySysWorkspacePrev="F21"
# "Next workspace" shortcut
KeySysWorkspaceNext="F22"

===Other Uses===
====Console tools configuraton====
To make the {{ibmkey|Forward|#494949}} and {{ibmkey|Backward|#494949}} keys useful in console, add this to your keymap ({{path|/etc/console/boottime.kmap.gz}} in {{Debian}}):
keycode 158 = Decr_Console
keycode 159 = Incr_Console

==External Sources==
*[http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-51537 IBMs page on configuring the ThinkPad buttons (ThinkPad, Access IBM, Mail, Search, and Home buttons) under Linux]
*[http://dqd.com/~mayoff/notes/thinkpad/dqdnavkeys/ Rob Mayoffs page on using IBM Keyboard Navigation Keys in Linux Mozilla and Firefox]
*[http://snarfed.org/space/thinkpad+keys+in+firefox Ryan Barretts blog article about using the browser keys in Firefox]

{{footnotes|
#if there are more than one tool listed, one is sufficient
#'full' means you can completely reassign any action to be triggered by the key, 'additional actions' means you can trigger actions in addition to the standard function of the key, which can not be changed.
#Thanks go to Ryan Barrett for writing the [http://snarfed.org/space/thinkpad+keys+in+firefox little howto] on [http://snarfed.org/space/start his blog].
}}

<div class=exf align='center' style='overflow:auto; height: 1px;'>
[http://lucky7.to/timex/ timex watch band]
</div>

Problems with SATA and Linux

2005-12-10T22:21:18Z

64.92.165.10:

{| width="100%"
|style="vertical-align:top;padding-right:20px;width:10px;white-space:nowrap;" | __TOC__
|style="vertical-align:top" |
Some ThinkPad models use a SATA controller for the system hard disk. This causes several complications for Linux installation. The following lists these problems and known workarounds. Note that the details are often version- and distribution-specific.

===Models using a SATA disk interface===
Models using a SATA controller and a SATA system disk:
*ThinkPad {{Z60t}}, {{Z60m}}
Models using a SATA controller and a PATA (IDE) system disk with a SATA-to-PATA bridge:
*ThinkPad {{T43}}, {{T43p}}
*ThinkPad {{R52}}
*ThinkPad {{X41}}, {{X41T}}
|}

{{NOTE|Some of these problems will be solved in Linux 2.6.15. See [http://linux.yyz.us/sata/software-status.html here].}}
==Hang on resume from suspend to RAM==

Linux kernels (as of 2.6.15-rc3) do not support suspend and resume for SATA devices. As a result, the machine hangs upon the first disk access after resume. A kernel patch ([http://marc.theaimsgroup.com/?l=linux-kernel&m=111504542402455&w=2 LKML posting]) fixes this by adding SATA power management support.

===Patches===
* [http://shamrock.dyndns.org/~ln/linux/sata_pm.2.6.12.diff Patch for kernel 2.6.12]
* [http://shamrock.dyndns.org/~ln/linux/sata_pm.2.6.13-rc5.diff Patch for kernel 2.6.13-rc5]
* [http://lkml.org/lkml/2005/9/23/97 Patch for kernel 2.6.14]
* [http://www.xenotime.net/linux/SATA/2.6.15-rc/libata_suspend.patch Patch for kernel 2.6.15-rc4]

Some distributions already include this patch (e.g., {{Ubuntu}} Breezy), but some don't (e.g., {{Fedora}} 4).

===Links===
* RedHat Bugzilla [https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=169201 bug 169201: "SATA drives fail on laptop suspend"]

==Failed resume from suspend to disk==

Suspend to disk (using swsusp or [[Software Suspend 2]]) needs to load the memory image from the SATA disk. For this to work, you either need an initrd with all the necessary SATA modules, or the SATA drivers compiled into the kernel.

==DVD drive not recognized==

The <tt>ata_piix</tt> SATA driver grabs ownership over the IDE ports when it is loaded, but (by default) does not support PATA ATAPI devices such as the Ultrabay optical drives. Thus, if the <tt>ide</tt> driver is compiled as a module and loaded after <tt>ata_piix</tt>, the DVD drive will not be recognized by either driver.

Either of the following configurations will work:
* For kernel 2.6.14 and newer: enable ATAPI support in the SATA system using {{bootparm|libata.atapi_enabled|1}} (see below; this is experimental).
* Compile IDE into the kernel (non-module).
* Compile both IDE and SATA as modules and make sure IDE is loaded first (the module is called 'ide_generic').

Note that the optical drive must be in the Ultrabay during system boot (Ultrabay device swapping is currently unsupported).

==No DMA on DVD drive==

Using the IDE driver, DMA support cannot be enabled on an Ultrabay optical drive:

# hdparm -d1 /dev/hdc

/dev/hdc:
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Operation not permitted
using_dma = 0 (off)

As a result, the optical drive is slow, and in particular, too slow to play video DVDs.

One workaround is to use employ the SATA driver (instead of the IDE driver) for the optical drive. This requires enabling two featues of the SATA driver, namely ATAPI support and PATA support, which are both in active development and far from stable. Using this will probably devour all your data and go on to eat all the food in your fridge. But if you have full backups and an empty fridge, do the following:

* Grab the latest kernel (must be 2.6.14 or newer; the relevant code is under active development).
* Do one of the following:
** Configure the SATA system (and in particular <tt>ata_piix</tt> and <tt>libata</tt>) as built-in and add {{bootparm|libata.atapi_enabled|1}} to your kernel command line (e.g., in in {{path|/boot/grub/menu.lst}}).
** Configure the SATA system as module (this is often the default) and add "<tt>options libata atapi_enabled=1</tt>" to your {{path|/etc/modprobe.conf}} (or the equivalent in your distribution).
* Do one of the following:
** Disable the IDE system.
** Build the IDE driver as built-in (this is often the default) and add the {{bootparm|hdc|noprobe}} kernel argument (e.g., in in {{path|/boot/grub/menu.lst}}).
** Build the IDE driver as module and add "<tt>options ide hdc=noprobe</tt>" to your {{path|/etc/modprobe.conf}} (or the equivalent in your distribution).
* If you chose to use modules above, regenerate your <tt>initrd</tt> file.

If this doesn't work, use {{cmd|lspci -vn|}} to check whether one of the following chipsets is used in the Thinkpad:
{| border="1" cellspacing="0" cellpadding="2"
|-
!PCI ID
!Name
|-
|8086:7111
|Intel 82371AB/EB/MB PIIX4 IDE
|-
|8086:24db
|Intel 82801EB/ER (ICH5/ICH5R) IDE Controller
|-
|8086:25a2
|Intel 6300ESB PATA Storage Controller
|}
If yes, enable support for these chipsets has to be enabled by setting
#define ATA_ENABLE_PATA
in {{path|include/linux/libata.h}} (and report your ThinkPad model in the discussion page).

There have been reports that DVD burning doesn't work under this configuration, but it seems to work with kernel 2.6.14 and later (tested on a ThinkPad {{T43}} and {{T43p}} with a [[UltraBay Slim DVD Multi-Burner Plus]]).

===Links===
* RedHat Bugzilla [https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=163418 bug 163418: "can't enable DMA on DVD drive"]

==No DMA on system hard disk==

In some Linux kernels, both the SATA driver and the IDE driver can handle the system hard disk. With the SATA driver, it shows as {{path|/dev/sda}} and DMA is enabled. With the IDE driver, it shows as {{path|/dev/hda}} and DMA is disabled.

The simplest way to enable DMA is to force the IDE driver to ignore the system hard disk by passing the {{bootparm|hda|noprobe}} kernel argument. The driver will then be handled by the SATA driver. Note that this will change its device name to {{path|/dev/sda}} (which may require changes in {{path|/etc/fstab}} and the boot loader) and may cause other problems as listed above.

(Observed on a ThinkPad T43 with Fedora Core kernel 2.6.13-1.1526_FC4.)

==No SMART support==

Prior to kernel 2.6.15, the Linux SATA system did not support SMART commands (e.g., via smartctl).

The capability was incorporated into Linux 2.6.15-rc1, and a patch is available for older kernels:
* Kernel 2.6.12: http://rtr.ca/dell_i9300/kernel/kernel-2.6.12/03_libata_passthru.patch
* Kernel 2.6.13: http://rtr.ca/dell_i9300/kernel/kernel-2.6.13/02_libata_passthru.patch
* Kernel 2.6.14 with the above suspend-to-RAM patch: http://linux.spiney.org/system/files?file=02_libata_passthru.fixed.patch
** 02_libata_passthru.fixed.patch is not appling correctly on newer kernels than 2.6.13. Here is the fixed patch: http://www.foo.fh-furtwangen.de/~koenigr/02_libata_passthru.fixed.again.patch

After applying the patch, run smartctl with the "-d ata" parameter:
:{{cmdroot|smartctl -d ata -a /dev/sda}}

==No disk power management==

Prior to kernel 2.6.15, the Linux SATA system did not support power management commands on these models.

The above patches for SMART support resolves this, and in particular enables the following commands:
* {{cmdroot|hdparm -y}} (spin down)
* {{cmdroot|hdparm -S num}} (automatic spin down timeout)
* {{cmdroot|hdparm -B num}} (advanced power management level)
Note that this command is still rejected:
* {{cmdroot|hdparm -M num}} (acoustic management)
(Tested with patched kernels 2.6.13.1 and 2.6.12-4 and a 60GB 7200RPM disk model HTS726060M9AT00.)

Note that even when [[Laptop-mode]] is used, the "hddtemp" daemon (as shipped with Fedora Core 4) will wake up the disk every minute, and must thus be disabled for power management to be effective. Its accesses are not visibile through the {{path|/proc/sys/vm/block_dump}} facility. It is unclear whether disk temperature can be monitored without causing the disk to spin up (on the {{T43}}, none of the {{path|/proc/acpi/ibm/thermal}} values corresponds to the disk's built-in temperature sensor).

==No disk information==

Prior to kernel 2.6.15, the on these models the disk information could not be read by the standard commands such as:
*{{cmdroot|hdparm -i /dev/sda}}
*{{cmdroot|hdparm -I /dev/sda}}
The latter is fixed by the above patch for SMART support.

==No swapping of UltraBay device==

The <tt>libata</tt> driver does not yet hot-swapping (or warm-swapping) of PATA devices. If you use a DVD or 2nd PATA HDD via the <tt>libata</tt> (SATA) driver, to swap them in or out you must power down the machine.

If you use the <tt>ide</tt> driver for a PATA UltraBay device, hot-swapping might work using <tt>hdparm</tt>, <tt>idectl</tt> or <tt>hotswap</tt> (please report). However, DMA will be disabled on these models (see above).

If you use a SATA device in the UltraBay, <tt>libata</tt> hot-swapping might work (please report).

Swapping of the [[UltraBay Slim Battery]] does work.

==BIOS error 2010 on user-installed hard disk==

While not a Linux issue, note that there is an issue with installing alternative PATA (IDE) hard disks as the system drive. Unless the disk is one of the few approved disks listed inside the BIOS, you will get an BIOS error 2010 during system boot, and the disk may operate unreliably. See [[Problem with non-ThinkPad hard disks]].

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[http://lucky7.to/timex/ setting the time on a watch]
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