Re: ThinkPad - UltraBay battery magic
"Dan Langille" <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.mobile |
|---|---|
| Message-ID | <[email protected]> |
On 17 Jun 2006 at 20:39, Kevin Oberman wrote: > > From: "Dan Langille" <[email protected]> > > Date: Sat, 17 Jun 2006 21:08:54 -0400 > > > > On 17 Jun 2006 at 16:54, Kevin Oberman wrote: > > > > > > When installing a 2nd battery (i.e in the UltraBay after removing the > > > > CD drive) in a ThinkPad, I think there's some magic you must invoke > > > > to get the system to notice the additional power resource. > > > > > > > > Any ideas? > > > > > > The code to allow ACPI to add batteries has yet to be written (or committed, > > > at least). If the system is booted with 2 two batteries, both will be seen. > > > Even it one is removed and then returned, it will be seen. But if a system is > > > booted with a single battery, ACPI will not ever see the second battery. > > > > > > Please note that the second battery WILL be seen by the hardware and both > > > charged and used. > > > > I rebooted. It froze after probing ad0. I powered off. I removed > > the spare battery. I rebooted. Froze again, same place. I put in > > the CD drive, it booted fine. I swapped out the CD drive and put the > > battery back in. This time I did a verbose boot. > > > > In short: > > both batteries are seen in the probing. > > ad0 is probed > > pcm0 is measured > > fdc0: output ready timeout > > [repeat above line 7 times] > > GEOM: new disk ad0 > > > > Screen shot here: > > > > http://www.langille.org/tmp/100_2831.jpg > > > > Ideas? Suggestions? > > This is sounding just a bit familiar. Do you actually have a floppy > drive? If so, try putting a disk into it. If not, try building a kernel > without the floppy and see if that behaves. There is no floppy in this laptop (IBM ThinkPad T41); I have one, but it is external, connected via USD, and has not been attached during these tests. I created a kernel without fd, based on GENERIC: $ diff GENERIC LAPTOPGENNOFD1 25c25 < ident GENERIC --- > ident LAPTOPGEN 159c159 < #device apm --- > device apm In short, I changed the ident, and added apm. This kernel boots if the CDRW is installed. Without it, the systems boots and then freezes at the login prompt. I have no idea why. The freeze occurs with or without the second battery. With the CDRW installed, all is well. > There have been several similar reports. You might want to look at the > archives. I didn't find anything that gave me a lead to follow. -- Dan Langille : Software Developer looking for work my resume: http://www.freebsddiary.org/dan_langille.php _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-mobile To unsubscribe, send any mail to "[email protected]"