loading Ubuntu Linux on Clamshell iBook - part 5

Probably I should conclude this series here.

The power issue is a niggling one, but couldn't solve it, so am living with a max battery life of 1.5 hours or so. Standby lifetime is around a week, so it's pretty nice to leave it on standby and start it up for a quick browse or something. Found that the Fn-backspace (or should I say Fn-delete?) combo works as the delete key (since the mac keyboard doesn't have a "backspace" and instead has a "delete" which works like a backspace).

Future work may be an upgrade to swfdec-mozilla 0.8 (currently installed is 0.6)which is supposed to let flash movies play OK. Currently using greasemonkey workaround to download from youtube and play with vlc on desktop.

loading Ubuntu Linux on Clamshell iBook - part 4

Previous posts in this series: Part 1, Part 2, Part 3.

USB mem-key automounting was pretty easy to add - just added ohci-hcd to the end of /etc/modules, and on next reboot, USB volumes were being automounted.

For the power management misreporting, did as suggested at applefritter, resetting PMU, PRAM and NVRAM followed by a full discharge. Copy-pasting from that post,

1) Reset the PMU again. With the computer off, use a straightened paper clip to push down the reset button "under the grille" near the power button for 5-10 seconds (the proper technique for this model). Your PMU has been reset.

2) Reset the PRAM. Start up the machine, then hold down the following 4-key combination immediately after the startup chime: [Apple]-[Option]-[letter P]-[letter R]. I usually find it helpful to hold [Apple]-[Option]-[letter R] with my left hand, press the power button with my right hand, then immediately press the [letter P]. Hold down all four keys until the Mac has chimed 3-4 times. When you let up, the Mac should start up normally. You'll have to shut it down again for the third step.

3) Reset the NVRAM. Start up the machine, then hold down the following 4-key combination immediately after the startup chime: [Apple]-[Option]-[letter O]-[letter F]. Hold down all four keys until the machine boots up to a grey screen with text: this is Open Firmware mode. NOTE: Be very careful what you do here! It's easy to mess things up in Open Firmware very quickly if you don't know what you're doing! Type the following commands exactly as they're written here, and follow each command by pressing the [Return] key:

reset-nvram
reset-all

Your NVRAM has been reset, and your Mac will now restart itself normally.

Now you can go about the task of completely draining, then recharging, your battery. Go to your Apple Menu>System Preferences>Energy Saver. Select "Battery" instead of "Power Adapter," and set the all the sliders to not sleep, ever. Period.

Now stick a CD in the drive and open iTunes. Turn on Repeat mode and play the CD indefinitely (you might want to pick a CD you actually like ...).

Unplug the power adapter and let the iBook run until it goes into low-power deep sleep. This could be the 5 minutes or so that you've been reporting, or it could be the full 2 hours that the battery should have been holding.

Once you're in deep-sleep mode, plug in the power adapter and allow the battery to charge for however long it takes -- overnight would be ideal. Then you can test the battery under normal use conditions and let us know what (if anything) has changed.

Sometimes, the PMU becomes confused and either (1) reports a charge higher than is actually on the battery, causing the charging circuit to turn off prematurely, (2) reports a charge lower than is actually on the battery, causing the computer to shut down or deep-sleep prematurely, or (3) some combination of these symptoms.

By resetting the PMU, the PRAM, and the NVRAM, the Mac should now have a clean slate and be forced to "relearn" when the battery is fully drained and fully charged. A full drain-and-charge cycle should help it find these parameters.

But unfortunately, after doing all that, still the battery shows only 44% charged, 1.15 hours remaining. Will have to dig some more.

loading Ubuntu Linux on Clamshell iBook - part 3

Part one of this series and part two have more details.

Adding left and right button emulation - this post (google led me to this guy who links to a bunch of iBook Linuxers) mentioned that F11 and F12 were already mapped to middle and right-click. Just tried mine, mine are, too! Since mouseemu is installed, it must be doing the job. Or maybe it is the line in my /etc/X11/xorg.conf which says Option "XkbRules" "xorg"
... Aha! This guy says it is in /etc/sysctl.conf, and it is!

dev/mac_hid/mouse_button_emulation = 1
dev/mac_hid/mouse_button2_keycode = 87
dev/mac_hid/mouse_button3_keycode = 88

Choosing System->Preferences->Keyboard, one gets the Gnome Keyboard Prefs. In the layouts tab, choosing the Layout options button, under Numeric Keypad Delete behaviour, I have chosen the . button to be delete button. Next on the todo list is to clear up the power behaviour. Currently, the charging doesn't seem to be taking place when running linux, or maybe the pmu is not reporting it correctly. The Gnome panel was showing 44% for much of the time I was using it earlier. Now it shows 37%. When I disconnect and reconnect power, /proc/pmu/battery_0 shows a different count. But then it seems to get stuck?!

Right now, cat /proc/pmu/battery_0 shows:

flags      : 00000011
charge     : 810
max_charge : 2141
current    : 0
voltage    : 16030
time rem.  : 0

More than an hour back, it showed

flags      : 00000011
charge     : 789
max_charge : 2141
current    : 0
voltage    : 16020
time rem.  : 0

Plucking out and putting back the power plug makes the charge start moving at the rate of 5 for ten seconds (815 to 820 in around 10 sec, for example). But now it has stopped at 827 and doesn't move any more. Will have to check out this issue as well as the lack of USB hotplug support (sees the USB key only if rebooted).

loading Ubuntu Linux on Clamshell iBook - part 2

The part 1 of this saga is here.

After a 256 MB SDRAM ordered from ebay.in arrived, installed xubuntu-desktop. But when it rebooted, it came up with gdm and gnome desktop by default. Looked pretty good. Went back to the login screen, chose Xfce, found the look to be similar, but some things like the volume control in the panel were missing. So, went back to the gnome desktop. Not too sluggish, pretty good, in fact. Installed various stuff like flash plugins for firefox mozilla-plugin-gnash and swfdec-mozilla, OpenOffice, etc, performance is good. Have to download flv files and play them with vlc or mplayer, since the swfdec has a CPU drinking problem playing flv flash players, does not refresh the screen. Hibernate is not supported in hardware, I think. Suspend works well. Have to disable the "Failed to suspend" message in GConf as mentioned in the help center. Battery life is perpetually shown as 40% in the Gnome panel applet. Must take a dekko at what can be done about that. But someone wants to buy the machine, so I may not get time to do that...

loading Ubuntu Linux on Clamshell iBook - part 1

This will a long post.

The Clamshell iBook was hamstrung by non-availability of current browsers for MacOS 9. Loading MacOS X was not an option, with only 64 MB of RAM and no DVD drive. On an impulse, looked up Ubuntu, and found it had a PowerPC install supporting older machines with http://cdimage.ubuntu.com/ports/releases/hardy/release/ubuntu-8.04.1-alternate-powerpc.iso

First started the install using just the install-powerpc image, but this didn't work: it went on for 45 minutes before asking me for user info, then went on for 2 more hours or so before saying that the install failed. Probably due to the limited RAM, tho' the installer was in "Low memory mode".

Then tried the cli-expert-powerpc image. Chose the same partitioning scheme as before,
Guided - use full disk
It created a 180 MB swap
(#4 180 MB swap)

One problem with this install was that it did not ask for a username - it created username oem and added it to sudoers list. The message was that I could run oem-config-prepare and then oem-config to change the oem user to whatever name I wanted. But the latter did not work, probably because of the minimal install. So, manually added user using adduser and added to sudo list using the method given here

sudo usermod -a -G admin username

removing the oem user with the technique given here, userdel.

Sound started working by adding snd-powermac to the end of modules with

sudo nano /etc/modules

as given in the PowerPC FAQ.

glxinfo reports no accelerated video as of now, though tried some stunts with setting the driver to ati and so on.

The Mac keyboard has some mapping problems. Where is the Del key for Ctrl-Alt-Del ?! Also, only a single button on the track-pad, so middle-clicking is out. Possible solution is at http://linuxaleph.blogspot.com/2008/11/mapping-middle-click-to-keyboard-key.html

Actually none of the bugs given at the Low-Memory Install page afffected my install, particularly the bug #202959 did not happen for me on the PowerPC. It does show an error while booting,

PCI: Cannot allocate resource region 0 of device 0001:10:19.0

but the boot process continues.

Adding repositories by editing sources.list sudo nano /etc/apt/sources.list was not so easy. The PowerPC builds were shifted to the ports servers, so finally found at http://ports.ubuntu.com/dists/hardy/
My sources.list file :

deb http://ports.ubuntu.com/ hardy-security main restricted
deb-src http://ports.ubuntu.com/ hardy-security main restricted
deb http://ports.ubuntu.com/ hardy-security universe
deb-src http://ports.ubuntu.com/ hardy-security universe
deb http://ports.ubuntu.com/ hardy-security multiverse
deb-src http://ports.ubuntu.com/ hardy-security multiverse
deb http://ports.ubuntu.com/ hardy main restricted
deb-src http://ports.ubuntu.com/ hardy main restricted
deb http://ports.ubuntu.com/ hardy universe
deb-src http://ports.ubuntu.com/ hardy universe
deb http://ports.ubuntu.com/ hardy multiverse
deb-src http://ports.ubuntu.com/ hardy multiverse

Installed IceWM using instructions from the Low-Memory Install page with

sudo aptitude install icewm iceconf icepref iceme icewm-themes

Tried installing xdm for auto-login, since gdm and kdm are resource-hungry. But then xdm doesn't have that feature! So, using the technique given here and here, putting startx at the end of .bashrc as

if [ $(tty) == "/dev/tty1" ]; then
startx
/sbin/halt
fi

Firefox and dillo work OK. Dillo is fast but doesn't render CSS. Firefox needs more RAM, swaps a lot. Ordered more RAM from ebay.in - PC-133 SDRAM "suitable for most P-III laptops". Actually need PC-66, I hope it works. With more RAM, might try installing xubuntu-desktop and other goodies.