aboutsummaryrefslogtreecommitdiffstats
path: root/Documentation/laptops
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/laptops')
-rw-r--r--Documentation/laptops/00-INDEX6
-rw-r--r--Documentation/laptops/Makefile8
-rw-r--r--Documentation/laptops/acer-wmi.txt2
-rw-r--r--Documentation/laptops/dslm.c166
-rw-r--r--Documentation/laptops/laptop-mode.txt172
-rw-r--r--Documentation/laptops/thinkpad-acpi.txt145
6 files changed, 251 insertions, 248 deletions
diff --git a/Documentation/laptops/00-INDEX b/Documentation/laptops/00-INDEX
index ee5692b26dd4..fa688538e757 100644
--- a/Documentation/laptops/00-INDEX
+++ b/Documentation/laptops/00-INDEX
@@ -2,6 +2,12 @@
2 - This file 2 - This file
3acer-wmi.txt 3acer-wmi.txt
4 - information on the Acer Laptop WMI Extras driver. 4 - information on the Acer Laptop WMI Extras driver.
5asus-laptop.txt
6 - information on the Asus Laptop Extras driver.
7disk-shock-protection.txt
8 - information on hard disk shock protection.
9dslm.c
10 - Simple Disk Sleep Monitor program
5laptop-mode.txt 11laptop-mode.txt
6 - how to conserve battery power using laptop-mode. 12 - how to conserve battery power using laptop-mode.
7sony-laptop.txt 13sony-laptop.txt
diff --git a/Documentation/laptops/Makefile b/Documentation/laptops/Makefile
new file mode 100644
index 000000000000..5cb144af3c09
--- /dev/null
+++ b/Documentation/laptops/Makefile
@@ -0,0 +1,8 @@
1# kbuild trick to avoid linker error. Can be omitted if a module is built.
2obj- := dummy.o
3
4# List of programs to build
5hostprogs-y := dslm
6
7# Tell kbuild to always build the programs
8always := $(hostprogs-y)
diff --git a/Documentation/laptops/acer-wmi.txt b/Documentation/laptops/acer-wmi.txt
index 0768fcc3ba3e..4beafa663dd6 100644
--- a/Documentation/laptops/acer-wmi.txt
+++ b/Documentation/laptops/acer-wmi.txt
@@ -173,7 +173,7 @@ Credits
173******* 173*******
174 174
175Olaf Tauber, who did the real hard work when he developed acerhk 175Olaf Tauber, who did the real hard work when he developed acerhk
176http://www.informatik.hu-berlin.de/~tauber/acerhk 176http://www.cakey.de/acerhk/
177All the authors of laptop ACPI modules in the kernel, whose work 177All the authors of laptop ACPI modules in the kernel, whose work
178was an inspiration in the early days of acer_acpi 178was an inspiration in the early days of acer_acpi
179Mathieu Segaud, who solved the problem with having to modprobe the driver 179Mathieu Segaud, who solved the problem with having to modprobe the driver
diff --git a/Documentation/laptops/dslm.c b/Documentation/laptops/dslm.c
new file mode 100644
index 000000000000..72ff290c5fc6
--- /dev/null
+++ b/Documentation/laptops/dslm.c
@@ -0,0 +1,166 @@
1/*
2 * dslm.c
3 * Simple Disk Sleep Monitor
4 * by Bartek Kania
5 * Licenced under the GPL
6 */
7#include <unistd.h>
8#include <stdlib.h>
9#include <stdio.h>
10#include <fcntl.h>
11#include <errno.h>
12#include <time.h>
13#include <string.h>
14#include <signal.h>
15#include <sys/ioctl.h>
16#include <linux/hdreg.h>
17
18#ifdef DEBUG
19#define D(x) x
20#else
21#define D(x)
22#endif
23
24int endit = 0;
25
26/* Check if the disk is in powersave-mode
27 * Most of the code is stolen from hdparm.
28 * 1 = active, 0 = standby/sleep, -1 = unknown */
29static int check_powermode(int fd)
30{
31 unsigned char args[4] = {WIN_CHECKPOWERMODE1,0,0,0};
32 int state;
33
34 if (ioctl(fd, HDIO_DRIVE_CMD, &args)
35 && (args[0] = WIN_CHECKPOWERMODE2) /* try again with 0x98 */
36 && ioctl(fd, HDIO_DRIVE_CMD, &args)) {
37 if (errno != EIO || args[0] != 0 || args[1] != 0) {
38 state = -1; /* "unknown"; */
39 } else
40 state = 0; /* "sleeping"; */
41 } else {
42 state = (args[2] == 255) ? 1 : 0;
43 }
44 D(printf(" drive state is: %d\n", state));
45
46 return state;
47}
48
49static char *state_name(int i)
50{
51 if (i == -1) return "unknown";
52 if (i == 0) return "sleeping";
53 if (i == 1) return "active";
54
55 return "internal error";
56}
57
58static char *myctime(time_t time)
59{
60 char *ts = ctime(&time);
61 ts[strlen(ts) - 1] = 0;
62
63 return ts;
64}
65
66static void measure(int fd)
67{
68 time_t start_time;
69 int last_state;
70 time_t last_time;
71 int curr_state;
72 time_t curr_time = 0;
73 time_t time_diff;
74 time_t active_time = 0;
75 time_t sleep_time = 0;
76 time_t unknown_time = 0;
77 time_t total_time = 0;
78 int changes = 0;
79 float tmp;
80
81 printf("Starting measurements\n");
82
83 last_state = check_powermode(fd);
84 start_time = last_time = time(0);
85 printf(" System is in state %s\n\n", state_name(last_state));
86
87 while(!endit) {
88 sleep(1);
89 curr_state = check_powermode(fd);
90
91 if (curr_state != last_state || endit) {
92 changes++;
93 curr_time = time(0);
94 time_diff = curr_time - last_time;
95
96 if (last_state == 1) active_time += time_diff;
97 else if (last_state == 0) sleep_time += time_diff;
98 else unknown_time += time_diff;
99
100 last_state = curr_state;
101 last_time = curr_time;
102
103 printf("%s: State-change to %s\n", myctime(curr_time),
104 state_name(curr_state));
105 }
106 }
107 changes--; /* Compensate for SIGINT */
108
109 total_time = time(0) - start_time;
110 printf("\nTotal running time: %lus\n", curr_time - start_time);
111 printf(" State changed %d times\n", changes);
112
113 tmp = (float)sleep_time / (float)total_time * 100;
114 printf(" Time in sleep state: %lus (%.2f%%)\n", sleep_time, tmp);
115 tmp = (float)active_time / (float)total_time * 100;
116 printf(" Time in active state: %lus (%.2f%%)\n", active_time, tmp);
117 tmp = (float)unknown_time / (float)total_time * 100;
118 printf(" Time in unknown state: %lus (%.2f%%)\n", unknown_time, tmp);
119}
120
121static void ender(int s)
122{
123 endit = 1;
124}
125
126static void usage(void)
127{
128 puts("usage: dslm [-w <time>] <disk>");
129 exit(0);
130}
131
132int main(int argc, char **argv)
133{
134 int fd;
135 char *disk = 0;
136 int settle_time = 60;
137
138 /* Parse the simple command-line */
139 if (argc == 2)
140 disk = argv[1];
141 else if (argc == 4) {
142 settle_time = atoi(argv[2]);
143 disk = argv[3];
144 } else
145 usage();
146
147 if (!(fd = open(disk, O_RDONLY|O_NONBLOCK))) {
148 printf("Can't open %s, because: %s\n", disk, strerror(errno));
149 exit(-1);
150 }
151
152 if (settle_time) {
153 printf("Waiting %d seconds for the system to settle down to "
154 "'normal'\n", settle_time);
155 sleep(settle_time);
156 } else
157 puts("Not waiting for system to settle down");
158
159 signal(SIGINT, ender);
160
161 measure(fd);
162
163 close(fd);
164
165 return 0;
166}
diff --git a/Documentation/laptops/laptop-mode.txt b/Documentation/laptops/laptop-mode.txt
index eeedee11c8c2..0bf25eebce94 100644
--- a/Documentation/laptops/laptop-mode.txt
+++ b/Documentation/laptops/laptop-mode.txt
@@ -207,7 +207,7 @@ Tips & Tricks
207* Drew Scott Daniels observed: "I don't know why, but when I decrease the number 207* Drew Scott Daniels observed: "I don't know why, but when I decrease the number
208 of colours that my display uses it consumes less battery power. I've seen 208 of colours that my display uses it consumes less battery power. I've seen
209 this on powerbooks too. I hope that this is a piece of information that 209 this on powerbooks too. I hope that this is a piece of information that
210 might be useful to the Laptop Mode patch or it's users." 210 might be useful to the Laptop Mode patch or its users."
211 211
212* In syslog.conf, you can prefix entries with a dash ``-'' to omit syncing the 212* In syslog.conf, you can prefix entries with a dash ``-'' to omit syncing the
213 file after every logging. When you're using laptop-mode and your disk doesn't 213 file after every logging. When you're using laptop-mode and your disk doesn't
@@ -779,172 +779,4 @@ Monitoring tool
779--------------- 779---------------
780 780
781Bartek Kania submitted this, it can be used to measure how much time your disk 781Bartek Kania submitted this, it can be used to measure how much time your disk
782spends spun up/down. 782spends spun up/down. See Documentation/laptops/dslm.c
783
784---------------------------dslm.c BEGIN-----------------------------------------
785/*
786 * Simple Disk Sleep Monitor
787 * by Bartek Kania
788 * Licenced under the GPL
789 */
790#include <unistd.h>
791#include <stdlib.h>
792#include <stdio.h>
793#include <fcntl.h>
794#include <errno.h>
795#include <time.h>
796#include <string.h>
797#include <signal.h>
798#include <sys/ioctl.h>
799#include <linux/hdreg.h>
800
801#ifdef DEBUG
802#define D(x) x
803#else
804#define D(x)
805#endif
806
807int endit = 0;
808
809/* Check if the disk is in powersave-mode
810 * Most of the code is stolen from hdparm.
811 * 1 = active, 0 = standby/sleep, -1 = unknown */
812int check_powermode(int fd)
813{
814 unsigned char args[4] = {WIN_CHECKPOWERMODE1,0,0,0};
815 int state;
816
817 if (ioctl(fd, HDIO_DRIVE_CMD, &args)
818 && (args[0] = WIN_CHECKPOWERMODE2) /* try again with 0x98 */
819 && ioctl(fd, HDIO_DRIVE_CMD, &args)) {
820 if (errno != EIO || args[0] != 0 || args[1] != 0) {
821 state = -1; /* "unknown"; */
822 } else
823 state = 0; /* "sleeping"; */
824 } else {
825 state = (args[2] == 255) ? 1 : 0;
826 }
827 D(printf(" drive state is: %d\n", state));
828
829 return state;
830}
831
832char *state_name(int i)
833{
834 if (i == -1) return "unknown";
835 if (i == 0) return "sleeping";
836 if (i == 1) return "active";
837
838 return "internal error";
839}
840
841char *myctime(time_t time)
842{
843 char *ts = ctime(&time);
844 ts[strlen(ts) - 1] = 0;
845
846 return ts;
847}
848
849void measure(int fd)
850{
851 time_t start_time;
852 int last_state;
853 time_t last_time;
854 int curr_state;
855 time_t curr_time = 0;
856 time_t time_diff;
857 time_t active_time = 0;
858 time_t sleep_time = 0;
859 time_t unknown_time = 0;
860 time_t total_time = 0;
861 int changes = 0;
862 float tmp;
863
864 printf("Starting measurements\n");
865
866 last_state = check_powermode(fd);
867 start_time = last_time = time(0);
868 printf(" System is in state %s\n\n", state_name(last_state));
869
870 while(!endit) {
871 sleep(1);
872 curr_state = check_powermode(fd);
873
874 if (curr_state != last_state || endit) {
875 changes++;
876 curr_time = time(0);
877 time_diff = curr_time - last_time;
878
879 if (last_state == 1) active_time += time_diff;
880 else if (last_state == 0) sleep_time += time_diff;
881 else unknown_time += time_diff;
882
883 last_state = curr_state;
884 last_time = curr_time;
885
886 printf("%s: State-change to %s\n", myctime(curr_time),
887 state_name(curr_state));
888 }
889 }
890 changes--; /* Compensate for SIGINT */
891
892 total_time = time(0) - start_time;
893 printf("\nTotal running time: %lus\n", curr_time - start_time);
894 printf(" State changed %d times\n", changes);
895
896 tmp = (float)sleep_time / (float)total_time * 100;
897 printf(" Time in sleep state: %lus (%.2f%%)\n", sleep_time, tmp);
898 tmp = (float)active_time / (float)total_time * 100;
899 printf(" Time in active state: %lus (%.2f%%)\n", active_time, tmp);
900 tmp = (float)unknown_time / (float)total_time * 100;
901 printf(" Time in unknown state: %lus (%.2f%%)\n", unknown_time, tmp);
902}
903
904void ender(int s)
905{
906 endit = 1;
907}
908
909void usage()
910{
911 puts("usage: dslm [-w <time>] <disk>");
912 exit(0);
913}
914
915int main(int argc, char **argv)
916{
917 int fd;
918 char *disk = 0;
919 int settle_time = 60;
920
921 /* Parse the simple command-line */
922 if (argc == 2)
923 disk = argv[1];
924 else if (argc == 4) {
925 settle_time = atoi(argv[2]);
926 disk = argv[3];
927 } else
928 usage();
929
930 if (!(fd = open(disk, O_RDONLY|O_NONBLOCK))) {
931 printf("Can't open %s, because: %s\n", disk, strerror(errno));
932 exit(-1);
933 }
934
935 if (settle_time) {
936 printf("Waiting %d seconds for the system to settle down to "
937 "'normal'\n", settle_time);
938 sleep(settle_time);
939 } else
940 puts("Not waiting for system to settle down");
941
942 signal(SIGINT, ender);
943
944 measure(fd);
945
946 close(fd);
947
948 return 0;
949}
950---------------------------dslm.c END-------------------------------------------
diff --git a/Documentation/laptops/thinkpad-acpi.txt b/Documentation/laptops/thinkpad-acpi.txt
index 75afa1229fd7..1565eefd6fd5 100644
--- a/Documentation/laptops/thinkpad-acpi.txt
+++ b/Documentation/laptops/thinkpad-acpi.txt
@@ -292,13 +292,13 @@ sysfs notes:
292 292
293 Warning: when in NVRAM mode, the volume up/down/mute 293 Warning: when in NVRAM mode, the volume up/down/mute
294 keys are synthesized according to changes in the mixer, 294 keys are synthesized according to changes in the mixer,
295 so you have to use volume up or volume down to unmute, 295 which uses a single volume up or volume down hotkey
296 as per the ThinkPad volume mixer user interface. When 296 press to unmute, as per the ThinkPad volume mixer user
297 in ACPI event mode, volume up/down/mute are reported as 297 interface. When in ACPI event mode, volume up/down/mute
298 separate events, but this behaviour may be corrected in 298 events are reported by the firmware and can behave
299 future releases of this driver, in which case the 299 differently (and that behaviour changes with firmware
300 ThinkPad volume mixer user interface semantics will be 300 version -- not just with firmware models -- as well as
301 enforced. 301 OSI(Linux) state).
302 302
303 hotkey_poll_freq: 303 hotkey_poll_freq:
304 frequency in Hz for hot key polling. It must be between 304 frequency in Hz for hot key polling. It must be between
@@ -309,7 +309,7 @@ sysfs notes:
309 will cause hot key presses that require NVRAM polling 309 will cause hot key presses that require NVRAM polling
310 to never be reported. 310 to never be reported.
311 311
312 Setting hotkey_poll_freq too low will cause repeated 312 Setting hotkey_poll_freq too low may cause repeated
313 pressings of the same hot key to be misreported as a 313 pressings of the same hot key to be misreported as a
314 single key press, or to not even be detected at all. 314 single key press, or to not even be detected at all.
315 The recommended polling frequency is 10Hz. 315 The recommended polling frequency is 10Hz.
@@ -397,6 +397,7 @@ ACPI Scan
397event code Key Notes 397event code Key Notes
398 398
3990x1001 0x00 FN+F1 - 3990x1001 0x00 FN+F1 -
400
4000x1002 0x01 FN+F2 IBM: battery (rare) 4010x1002 0x01 FN+F2 IBM: battery (rare)
401 Lenovo: Screen lock 402 Lenovo: Screen lock
402 403
@@ -404,7 +405,8 @@ event code Key Notes
404 this hot key, even with hot keys 405 this hot key, even with hot keys
405 disabled or with Fn+F3 masked 406 disabled or with Fn+F3 masked
406 off 407 off
407 IBM: screen lock 408 IBM: screen lock, often turns
409 off the ThinkLight as side-effect
408 Lenovo: battery 410 Lenovo: battery
409 411
4100x1004 0x03 FN+F4 Sleep button (ACPI sleep button 4120x1004 0x03 FN+F4 Sleep button (ACPI sleep button
@@ -433,7 +435,8 @@ event code Key Notes
433 Do you feel lucky today? 435 Do you feel lucky today?
434 436
4350x1008 0x07 FN+F8 IBM: toggle screen expand 4370x1008 0x07 FN+F8 IBM: toggle screen expand
436 Lenovo: configure UltraNav 438 Lenovo: configure UltraNav,
439 or toggle screen expand
437 440
4380x1009 0x08 FN+F9 - 4410x1009 0x08 FN+F9 -
439 .. .. .. 442 .. .. ..
@@ -444,7 +447,7 @@ event code Key Notes
444 either through the ACPI event, 447 either through the ACPI event,
445 or through a hotkey event. 448 or through a hotkey event.
446 The firmware may refuse to 449 The firmware may refuse to
447 generate further FN+F4 key 450 generate further FN+F12 key
448 press events until a S3 or S4 451 press events until a S3 or S4
449 ACPI sleep cycle is performed, 452 ACPI sleep cycle is performed,
450 or some time passes. 453 or some time passes.
@@ -512,15 +515,19 @@ events for switches:
512SW_RFKILL_ALL T60 and later hardware rfkill rocker switch 515SW_RFKILL_ALL T60 and later hardware rfkill rocker switch
513SW_TABLET_MODE Tablet ThinkPads HKEY events 0x5009 and 0x500A 516SW_TABLET_MODE Tablet ThinkPads HKEY events 0x5009 and 0x500A
514 517
515Non hot-key ACPI HKEY event map: 518Non hotkey ACPI HKEY event map:
519-------------------------------
520
521Events that are not propagated by the driver, except for legacy
522compatibility purposes when hotkey_report_mode is set to 1:
523
5160x5001 Lid closed 5240x5001 Lid closed
5170x5002 Lid opened 5250x5002 Lid opened
5180x5009 Tablet swivel: switched to tablet mode 5260x5009 Tablet swivel: switched to tablet mode
5190x500A Tablet swivel: switched to normal mode 5270x500A Tablet swivel: switched to normal mode
5200x7000 Radio Switch may have changed state 5280x7000 Radio Switch may have changed state
521 529
522The above events are not propagated by the driver, except for legacy 530Events that are never propagated by the driver:
523compatibility purposes when hotkey_report_mode is set to 1.
524 531
5250x2304 System is waking up from suspend to undock 5320x2304 System is waking up from suspend to undock
5260x2305 System is waking up from suspend to eject bay 5330x2305 System is waking up from suspend to eject bay
@@ -528,14 +535,39 @@ compatibility purposes when hotkey_report_mode is set to 1.
5280x2405 System is waking up from hibernation to eject bay 5350x2405 System is waking up from hibernation to eject bay
5290x5010 Brightness level changed/control event 5360x5010 Brightness level changed/control event
530 537
531The above events are never propagated by the driver. 538Events that are propagated by the driver to userspace:
532 539
5400x2313 ALARM: System is waking up from suspend because
541 the battery is nearly empty
5420x2413 ALARM: System is waking up from hibernation because
543 the battery is nearly empty
5330x3003 Bay ejection (see 0x2x05) complete, can sleep again 5440x3003 Bay ejection (see 0x2x05) complete, can sleep again
5450x3006 Bay hotplug request (hint to power up SATA link when
546 the optical drive tray is ejected)
5340x4003 Undocked (see 0x2x04), can sleep again 5470x4003 Undocked (see 0x2x04), can sleep again
5350x500B Tablet pen inserted into its storage bay 5480x500B Tablet pen inserted into its storage bay
5360x500C Tablet pen removed from its storage bay 5490x500C Tablet pen removed from its storage bay
537 5500x6011 ALARM: battery is too hot
538The above events are propagated by the driver. 5510x6012 ALARM: battery is extremely hot
5520x6021 ALARM: a sensor is too hot
5530x6022 ALARM: a sensor is extremely hot
5540x6030 System thermal table changed
555
556Battery nearly empty alarms are a last resort attempt to get the
557operating system to hibernate or shutdown cleanly (0x2313), or shutdown
558cleanly (0x2413) before power is lost. They must be acted upon, as the
559wake up caused by the firmware will have negated most safety nets...
560
561When any of the "too hot" alarms happen, according to Lenovo the user
562should suspend or hibernate the laptop (and in the case of battery
563alarms, unplug the AC adapter) to let it cool down. These alarms do
564signal that something is wrong, they should never happen on normal
565operating conditions.
566
567The "extremely hot" alarms are emergencies. According to Lenovo, the
568operating system is to force either an immediate suspend or hibernate
569cycle, or a system shutdown. Obviously, something is very wrong if this
570happens.
539 571
540Compatibility notes: 572Compatibility notes:
541 573
@@ -650,6 +682,10 @@ LCD, CRT or DVI (if available). The following commands are available:
650 echo expand_toggle > /proc/acpi/ibm/video 682 echo expand_toggle > /proc/acpi/ibm/video
651 echo video_switch > /proc/acpi/ibm/video 683 echo video_switch > /proc/acpi/ibm/video
652 684
685NOTE: Access to this feature is restricted to processes owning the
686CAP_SYS_ADMIN capability for safety reasons, as it can interact badly
687enough with some versions of X.org to crash it.
688
653Each video output device can be enabled or disabled individually. 689Each video output device can be enabled or disabled individually.
654Reading /proc/acpi/ibm/video shows the status of each device. 690Reading /proc/acpi/ibm/video shows the status of each device.
655 691
@@ -924,70 +960,21 @@ Sysfs notes:
924 subsystem, and follow all of the hwmon guidelines at 960 subsystem, and follow all of the hwmon guidelines at
925 Documentation/hwmon. 961 Documentation/hwmon.
926 962
963EXPERIMENTAL: Embedded controller register dump
964-----------------------------------------------
927 965
928EXPERIMENTAL: Embedded controller register dump -- /proc/acpi/ibm/ecdump 966This feature is not included in the thinkpad driver anymore.
929------------------------------------------------------------------------ 967Instead the EC can be accessed through /sys/kernel/debug/ec with
930 968a userspace tool which can be found here:
931This feature is marked EXPERIMENTAL because the implementation 969ftp://ftp.suse.com/pub/people/trenn/sources/ec
932directly accesses hardware registers and may not work as expected. USE
933WITH CAUTION! To use this feature, you need to supply the
934experimental=1 parameter when loading the module.
935
936This feature dumps the values of 256 embedded controller
937registers. Values which have changed since the last time the registers
938were dumped are marked with a star:
939
940[root@x40 ibm-acpi]# cat /proc/acpi/ibm/ecdump
941EC +00 +01 +02 +03 +04 +05 +06 +07 +08 +09 +0a +0b +0c +0d +0e +0f
942EC 0x00: a7 47 87 01 fe 96 00 08 01 00 cb 00 00 00 40 00
943EC 0x10: 00 00 ff ff f4 3c 87 09 01 ff 42 01 ff ff 0d 00
944EC 0x20: 00 00 00 00 00 00 00 00 00 00 00 03 43 00 00 80
945EC 0x30: 01 07 1a 00 30 04 00 00 *85 00 00 10 00 50 00 00
946EC 0x40: 00 00 00 00 00 00 14 01 00 04 00 00 00 00 00 00
947EC 0x50: 00 c0 02 0d 00 01 01 02 02 03 03 03 03 *bc *02 *bc
948EC 0x60: *02 *bc *02 00 00 00 00 00 00 00 00 00 00 00 00 00
949EC 0x70: 00 00 00 00 00 12 30 40 *24 *26 *2c *27 *20 80 *1f 80
950EC 0x80: 00 00 00 06 *37 *0e 03 00 00 00 0e 07 00 00 00 00
951EC 0x90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
952EC 0xa0: *ff 09 ff 09 ff ff *64 00 *00 *00 *a2 41 *ff *ff *e0 00
953EC 0xb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
954EC 0xc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
955EC 0xd0: 03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
956EC 0xe0: 00 00 00 00 00 00 00 00 11 20 49 04 24 06 55 03
957EC 0xf0: 31 55 48 54 35 38 57 57 08 2f 45 73 07 65 6c 1a
958
959This feature can be used to determine the register holding the fan
960speed on some models. To do that, do the following:
961 970
971Use it to determine the register holding the fan
972speed on some models. To do that, do the following:
962 - make sure the battery is fully charged 973 - make sure the battery is fully charged
963 - make sure the fan is running 974 - make sure the fan is running
964 - run 'cat /proc/acpi/ibm/ecdump' several times, once per second or so 975 - use above mentioned tool to read out the EC
965 976
966The first step makes sure various charging-related values don't 977Often fan and temperature values vary between
967vary. The second ensures that the fan-related values do vary, since
968the fan speed fluctuates a bit. The third will (hopefully) mark the
969fan register with a star:
970
971[root@x40 ibm-acpi]# cat /proc/acpi/ibm/ecdump
972EC +00 +01 +02 +03 +04 +05 +06 +07 +08 +09 +0a +0b +0c +0d +0e +0f
973EC 0x00: a7 47 87 01 fe 96 00 08 01 00 cb 00 00 00 40 00
974EC 0x10: 00 00 ff ff f4 3c 87 09 01 ff 42 01 ff ff 0d 00
975EC 0x20: 00 00 00 00 00 00 00 00 00 00 00 03 43 00 00 80
976EC 0x30: 01 07 1a 00 30 04 00 00 85 00 00 10 00 50 00 00
977EC 0x40: 00 00 00 00 00 00 14 01 00 04 00 00 00 00 00 00
978EC 0x50: 00 c0 02 0d 00 01 01 02 02 03 03 03 03 bc 02 bc
979EC 0x60: 02 bc 02 00 00 00 00 00 00 00 00 00 00 00 00 00
980EC 0x70: 00 00 00 00 00 12 30 40 24 27 2c 27 21 80 1f 80
981EC 0x80: 00 00 00 06 *be 0d 03 00 00 00 0e 07 00 00 00 00
982EC 0x90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
983EC 0xa0: ff 09 ff 09 ff ff 64 00 00 00 a2 41 ff ff e0 00
984EC 0xb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
985EC 0xc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
986EC 0xd0: 03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
987EC 0xe0: 00 00 00 00 00 00 00 00 11 20 49 04 24 06 55 03
988EC 0xf0: 31 55 48 54 35 38 57 57 08 2f 45 73 07 65 6c 1a
989
990Another set of values that varies often is the temperature
991readings. Since temperatures don't change vary fast, you can take 978readings. Since temperatures don't change vary fast, you can take
992several quick dumps to eliminate them. 979several quick dumps to eliminate them.
993 980
@@ -1037,6 +1024,10 @@ ThinkPad-specific interface. The driver will disable its native
1037backlight brightness control interface if it detects that the standard 1024backlight brightness control interface if it detects that the standard
1038ACPI interface is available in the ThinkPad. 1025ACPI interface is available in the ThinkPad.
1039 1026
1027If you want to use the thinkpad-acpi backlight brightness control
1028instead of the generic ACPI video backlight brightness control for some
1029reason, you should use the acpi_backlight=vendor kernel parameter.
1030
1040The brightness_enable module parameter can be used to control whether 1031The brightness_enable module parameter can be used to control whether
1041the LCD brightness control feature will be enabled when available. 1032the LCD brightness control feature will be enabled when available.
1042brightness_enable=0 forces it to be disabled. brightness_enable=1 1033brightness_enable=0 forces it to be disabled. brightness_enable=1
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-22 07:46:43 -0500