Thinkpads Forum

Cunha wrote:It seems like both 65 watt adapters and 90 watt adapters are listed as working with the X60 series.

paul*robertson wrote:Is the 65w the same for the X60 as the X61.

paul*robertson wrote:Is the 65w the same for the X60 as the X61.

adrianaitken wrote:I've just got 2 of the slim power supplies. What can I say - they're slim and supply power

paul*robertson wrote:Where did you get them. I'm after a genuine Lenova charger for my X61.

paul*robertson wrote:Slightly off topic, do Lenova make an in-car charger/ power supply for the X6 series. I know in the UK it would plug into the cigarette lighter socket.

Woodenspoon wrote:Whats with those under 10 dollar adapters on ebay? There seem to be tons.

I got scared and paid for the 20 dollar one,
http://cgi.ebay.com/IBM-Lenovo-90W-T60- ... 564097a0d2
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 0581594310
one is 20 dollars, other is 25, not sure whats the difference there either grumble.

Anyways, yea i got into this forum doing the long horrible search for a cheap student laptop solution. Kinda surprised theres no ultimate faq at the top of this section....

paul*robertson wrote:Slightly off topic, do Lenova make an in-car charger/ power supply for the X6 series. I know in the UK it would plug into the cigarette lighter socket.

crazyfrog wrote:The slim adapter even has a smaller version: Ultraslim adapter. http://www-307.ibm.com/pc/support/site. ... MIGR-72900
BTW, if one is more concerned about weight, ThinkPad 65W Ultraportable adapter is better as it is just 260 g (0.57 lb), while ThinkPad 90W slim adapter is almost doubled 425 g (0.94 lb) and even Ultraslim adapter weights 400g(0.88 lb).

u.mac wrote:65W are *not* enough under all circumstances.... and 65W means 65W input, output is less then 50W.

If X6 is docked to ultrabase *without* battery, many features in use (Wifi, BT, some USB, Ultrabay-HDD...) are installed and you're looking hd-video... X6 will hang

With (not empty) battery you'll see in powermanager, where the missing power come from

Same problem is known from T6x and W510 with 90W power supply

This is a warning to owners of any Lenovo ThinkPads that own 65W AC power
adaptors.

Apparently, the 65W power supplies alone are NOT sufficient to power the
notebook in all scenarios. The battery can be used to supply power
during demand peaks that the external power supply cannot meet, and the
firmware knows this.

As a safety measure, the firmware attempts to identify whether you have
a underpowered power supply or not, and will attempt to limit CPU power
usage (by limiting its maximum allowed clock frequency) if you try to
use such a power supply WITHOUT a battery.

We know for sure the Z61, T60 and T410 are affected. That means there
is a very high probability that just about every recent Lenovo ThinkPad
have the same limitation, except maybe the ones with ultra-low-voltage
processors.

In order for the protection mechanism to work correctly, it is required
that the operating system correctly process the PPC ACPI mechanism, and
that cpufreq support is active and working.

You are advised to:

1. Use high-powered power supplies (90W seems enough) with your
Lenovo ThinkPad during high power-draw workloads (i.e. loads where
there is heavy demand of the CPU or discrete GPU). This allows
the ThinkPad to operate on its higher speeds during the entire
workload.

2. Never use the 65W power adapter *WITHOUT* a battery, just in case
the operating system is not doing its job properly;

3. ALWAYS use the latest firmware (EC and BIOS) available. You have
been warned.

If your usage patterns does include the use of a 65W power adapter
*WITHOUT* a charged battery:

1. Use the latest Linux stable kernels, as there were recent fixes
to the ACPI PPC handling;

2. Make sure the CPUFREQ system is working (i.e. cpu frequency limits
are available), ACPI is operational (NEVER operate any ThinkPad
manufactured in the last 5 years with ACPI deactivated), and if
at all possible, that CPUIDLE (ACPI C states) are also working.
"powertop" will show both CPUFREQ and CPUIDLE operation.

3. Never *EVER* tell the kernel ACPI drivers to ignore the ACPI PPC
method in a ThinkPad (i.e. never use the ignore_ppc=1 kernel
parameter). If you have any PPC-related problem, *report a bug*,
don't just try to work around it.

It is worth noting that, if the operating system does its job correctly
(and you did not braindamage it on purpose by using certain kernel
parameters) your data is NEVER in a dangerous situation, as the laptop
firmware will take steps to make sure it will have enough power to
operate properly.

This has been brought to our attention due to a bug in the Linux kernel
ACPI handling of the "_PPC" method which interacted badly with the T410
firmware. I am not sure what the situation with very old kernels is,
but for 2.6.32 and later kernels, you are strongly advised to use the
latest stable kernels, which have been fixed to handle _PPC correctly.

As a general rule, don't use any recent Lenovo ThinkPad with a 65W power
adapter without a battery. These boxes really want a high-power (90W or
more) power adapter.

loyukfai wrote:Today's notebook adapters are cleverer than before. I have used a watt-meter to monitor the power consumption before, once unplugged, the adapter draws little to zero power.

Cheers.