Thinkpad G41 overheating - Revision history

Bugmenot2: removed dead ended category, no such category exists at the moment

2019-11-19T09:52:19Z

removed dead ended category, no such category exists at the moment

Magnum at 15:35, 13 February 2011

2011-02-13T15:35:45Z

Akw: Typo

2008-07-26T12:32:57Z

Typo

Dotz at 08:32, 28 April 2007

2007-04-28T08:32:50Z

Dotz at 00:45, 27 December 2006

2006-12-27T00:45:53Z

Dotz at 00:45, 27 December 2006

2006-12-27T00:45:22Z

Dotz at 00:43, 27 December 2006

2006-12-27T00:43:49Z

Dotz at 00:41, 27 December 2006

2006-12-27T00:41:25Z

Dotz at 00:41, 27 December 2006

2006-12-27T00:41:05Z

Dotz at 00:39, 27 December 2006

2006-12-27T00:39:53Z

← Older revision		Revision as of 09:52, 19 November 2019
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−	~~[[Category: Overheating]]~~	+	[[Category:G41]]
−	~~[[Category:G Series]]~~[[Category:G41]]
	Forgot the voodoo, that I (Dotz) wrote earlier on this topic. You can still check the page history.		Forgot the voodoo, that I (Dotz) wrote earlier on this topic. You can still check the page history.

← Older revision		Revision as of 15:35, 13 February 2011
Line 1:		Line 1:
		+	[[Category: Overheating]]
	[[Category:G Series]][[Category:G41]]		[[Category:G Series]][[Category:G41]]
	Forgot the voodoo, that I (Dotz) wrote earlier on this topic. You can still check the page history.		Forgot the voodoo, that I (Dotz) wrote earlier on this topic. You can still check the page history.

@@ Line 1: / Line 1: @@
 [[Category:G Series]][[Category:G41]]
-Forgot the voodo, that I (Dotz) wrote earlier on this topic. You can still check the page history.
+Forgot the voodoo, that I (Dotz) wrote earlier on this topic. You can still check the page history.
 As long as you have your BIOS upgraded and the fan speeds up while heat rises, if your G41 is overheating, that's probably a hardware problem.

@@ Line 1: / Line 1: @@
 [[Category:G Series]][[Category:G41]]
-This is a short description of what happened today (27th Dec 2006), with my overheating G41. It's not too technical (in fact, it sounds a bit crazy and paranoid -- but it worked), as I don't exactly understand, what happened. Anyway, I'm placing it here -- perhaps someone with better hardware knowledge, than me, could improve it, and tell me what happened.
+Forgot the voodo, that I (Dotz) wrote earlier on this topic. You can still check the page history.
-The problem: my G41 (equipped with P4 3.4 GHz and NVidia), when working at full CPU speed, started to overheat some time ago. Temperatures reached 85 deg Celsius, causing kernel to shut down the system (with "temperature above threshold" message). After some time, even if I downscaled the CPU using cpu-freq (down to 433 MHz) the CPU temperature could reach 85 deg Celsius and the system shutted down.
+As long as you have your BIOS upgraded and the fan speeds up while heat rises, if your G41 is overheating, that's probably a hardware problem.
-What I have noticed is, that the fan was always pretty quiet. It never reached higher RPM speeds. Temporary solution? I used an external cooling fan (40 Watt can give you pretty much cool air); unfortunatley, the CPU could still overheat. Perfect solution? Learn, how to control CPU cooling fan using Linux.
+Today, I tore my G41 apart, disassembled the fan, cleaned it and put some extra thermal paste on CPU (that's very important).
-I've looked in many places to achieve that. Unfortunatley, [[Ibm-acpi|ibm-acpi]] (0.12a, even with the patch) doesn't seem to support fan speed on G41. I have no idea about 0.13 in 2.6.20.
+And guess what. Works like a charm. There's no more overheat problem for me.

@@ Line 1: / Line 1: @@
 [[Category:G Series]][[Category:G41]]
-This is a short description of what happened today (27th Dec 2006), with my overheating G41. It's not too technical, as I don't exactly understand, what happened. Anyway, I'm placing it here -- perhaps someone with better hardware knowledge, than me, could improve it, and tell me what happened.
+This is a short description of what happened today (27th Dec 2006), with my overheating G41. It's not too technical (in fact, it sounds a bit crazy and paranoid -- but it worked), as I don't exactly understand, what happened. Anyway, I'm placing it here -- perhaps someone with better hardware knowledge, than me, could improve it, and tell me what happened.
 The problem: my G41 (equipped with P4 3.4 GHz and NVidia), when working at full CPU speed, started to overheat some time ago. Temperatures reached 85 deg Celsius, causing kernel to shut down the system (with "temperature above threshold" message). After some time, even if I downscaled the CPU using cpu-freq (down to 433 MHz) the CPU temperature could reach 85 deg Celsius and the system shutted down.

@@ Line 38: / Line 38: @@
 What I have found out is, that:
-* writing to 0x57 I was able to do different display voodoo (turn off display scaling, change the backlight)
+* writing to 0x57 (values in range from 0x00 to 0xff) I was able to do different display voodoo (turn off display scaling, change the backlight)
 * writing into some registers caused the battery led to blink, like the battery was discharged -- also, yacpi seemed to report that the battery is drained (and, the battery was really fully loaded -- perhaps if I continued to use the machine, it would try to overload the battery, possibly causing it to explode? no idea... be careful!)
 * 0x9a (I believe) caused the machine to freeze; there were some more registers, that caused the machine to freeze

@@ Line 16: / Line 16: @@
 ) find the correct register in /proc/acpi/ibm/ecdump
-I've started to write 0x07 value into every register, using a simple Python script:
+I've started to write 0x07 value into every register, using a simple Python script (well, actually, it writes 0x06, then 0x07):
@@ Line 39: / Line 39: @@
 * writing to 0x57 I was able to do different display voodoo (turn off display scaling, change the backlight)
 * 0x9a (I believe) caused the machine to freeze; there were some more registers, that caused the machine to freeze
 * 0xea seemed to speed up the fan a bit, but after that, the fan went slow again

@@ Line 12: / Line 12: @@
 Unfortunatley, Linux (2.6.18) was still running on the same, slow fan speed. Even when I supplied the kernel with "acpi=off apm=off" boot parameters.
-So, what I've thought about is: 1) modprobe ibm-acpi experimental=1 2) find the correct register in /proc/acpi/ibm/ecdump
+So, what I've thought about is:
 I've started to write 0x07 value into every register, using a simple Python script:

← Older revision		Revision as of 00:41, 27 December 2006
Line 1:		Line 1:
−	[[Category:G Series]]	+	[[Category:G Series]][[Category:G41]]
	This is a short description of what happened today (27th Dec 2006), with my overheating G41. It's not too technical, as I don't exactly understand, what happened. Anyway, I'm placing it here -- perhaps someone with better hardware knowledge, than me, could improve it, and tell me what happened.		This is a short description of what happened today (27th Dec 2006), with my overheating G41. It's not too technical, as I don't exactly understand, what happened. Anyway, I'm placing it here -- perhaps someone with better hardware knowledge, than me, could improve it, and tell me what happened.

← Older revision		Revision as of 00:39, 27 December 2006
Line 1:		Line 1:
		+	[[Category:G Series]]
	This is a short description of what happened today (27th Dec 2006), with my overheating G41. It's not too technical, as I don't exactly understand, what happened. Anyway, I'm placing it here -- perhaps someone with better hardware knowledge, than me, could improve it, and tell me what happened.		This is a short description of what happened today (27th Dec 2006), with my overheating G41. It's not too technical, as I don't exactly understand, what happened. Anyway, I'm placing it here -- perhaps someone with better hardware knowledge, than me, could improve it, and tell me what happened.