[maemo-developers] [maemo-developers] Getting scratchbox CPU transparency working on the n770

[From: Charles 'Buck' Krasic]

Just to followup.    I have CPU transparency working with 2.1 now.   The
general procedure I followed was basically the same as described in my
previous message to the list back when 2.0 was released.

     http://maemo.org/pipermail/maemo-developers/2006-June/004242.html

The high-level description is as follows:

   1) Install v2.1 production image (did this to make sure kernel, etc.
were compatible)

   2) Install v2.1 developer fs (this took me a while due to problems
with broken links on the website)

   3) Rebuild the 2.6.16 kernel in order to enable NFS support needed by
CPU transparency
          - generally followed the kernel compilation howto from the
maemo wiki.   I've added some comments to that wiki page indicating what
adjustments I had to make to the procedure.

   4) Reboot 77 and test... it worked.  :)

I hope this information might be of some help to others.

-- Buck

Charles 'Buck' Krasic wrote:
> I'm a CPU transparency user too.   I think I hit the same issue back
> when 2.0 was originally released.    See the following post for reference:
>
>       http://maemo.org/pipermail/maemo-developers/2006-June/004242.html
>
> Sounds to me like the issue remains the same in 2.1.  I am about to
> give it a try with 2.1, so I guess I will see.
>
> -- Buck
>
> Carl Worth wrote:
>
> > A while back I managed to get scratchbox CPU transparency working
> > on a Nokia 770. It's extremely cool voodoo, and very handy.
>
> > I just ran through the process again tonight, and took careful
> > notes on what I had to do. Some parts of it were a bit painful,
> > (and some even got a bit worse than the last time I tried). I've
> > attached my notes to myself below, (maybe there's some good wiki
> > fodder in here, but I don't know---a lot of it is redundant with
> > other more thorough pages scattered about the wiki already).
>
> > The question I have is whether some of this couldn't be made much
> > simpler in the "standard" latest software editions. In the
> > instructions below, I start with an older "Internet Edition 2006"
> > install (to get a kernel that works) and then also drop back to a
> > "developer" root filesystem to get the check boxes for UsbNet and
> > CPU transparency.
>
> > This is really handy stuff, but it's a shame to give up all the
> > fancy new software on this gadget in order to get at it. How hard
> > would it be to be able to add this support to a recent install? For
> > example, could that be made just a matter of a couple of extra
> > packages?
>
> > As for the kernel issues, with the 2.2006.39-14 release I wasn't
> > able to get "modprobe nfs" to work. It complained about something
> > that made me think depmod needed to be run, but then depmod didn't
> > work at all. I didn't explore further at that point but instead
> > just dropped back to 1.2006.26-8 since I knew I had gotten this all
> > to work at some point in the past.
>
> > Anyway, are other people doing things like this? If so, how are you
> > going about it? Are you making custom images, etc?
>
> > -Carl
>
> > First, let's get that n770 into a known state. This requires
> > downloading a flasher binary and a software image. The flasher
> > binary (for several platforms) is available here:
>
> > http://www.maemo.org/downloads/d3.php (With annoying click-through
> > license)
>
> > I used flasher-2.0, and that may be a requirement.
>
> > Next, you'll need an image to flash. Get the following file:
>
> > SU-18_2006SE_1.2006.26-8_PR_F5_MR0_ARM.bin from:
> > http://www.maemo.org/downloads/nokia_770 (Again, with annoying
> > click-through)
>
> > Don't be tempted by the newer 2.2006.39-14 release---the kernel it
> > comes with doesn't come with the necessary kernel modules.
>
> > So, now flash that image by following these steps:
>
> > 1. Power off the n770 (hold down the power button on top for a few
> > seconds)
>
> > 2. Connect it to your host with the provided USB cable
>
> > 3. Run the following on your host using the files downloaded above:
>
>
> > sudo ./flasher-2.0 -f -R -F
> > SU-18_2006SE_1.2006.26-8_PR_F5_MR0_ARM.bin
>
> > NOTE: At this point, the command will appear to hang with what
> > looks like an error message, ("Suitable USB device not found,
> > waiting"). This is normal and expected, just keep going.
>
> > 4. Press the power button on the n770 for a second or so.
>
> > The flashing should now proceed with progress indicators on both
> > sides, and the n770 should reboot when finished. You can now play
> > around with the applications installed for a bit, (since the next
> > step will wipe them out).
>
> > The applications have a lot of polish, but this image doesn't
> > include a couple of things we really want, (USB networking, and
> > scratchbox CPU transparency), so we're going to install a
> > "Developer Image" that misses a lot of applications and polish, but
> > lets us get some work done.
>
> > So, now download the following:
>
> > Maemo_Dev_Platform_v2.1_armel-rootfs.jffs2 from:
> > http://www.maemo.org/downloads/d1.php (A third, annoying
> > click-through(!))
>
> > Then repeat the flashing process, but the details of the flash
> > command are different since this is just a root filesystem, not a
> > "fiasco" image with kernel, initfs, rootfs, etc. So the steps once
> > again are:
>
> > 1. Power off n770
>
> > 2. Connect it
>
> > 3. Run the following command:
>
> > sudo ./flasher-2.0 -f -R -r
> > Maemo_Dev_Platform_v2.1_armel-rootfs.jffs2
>
> > 4. Power on the n770 and watch the flashing proceed
>
> > If you had played with the previous software install at all, then
> > you'll probably notice a few differences. Such as a big black SDK
> > when booting instead of the two hands, a drab gray theme instead of
> > the flashy orange stuff, and many fewer applications installed.
>
> > But the important difference is a little icon on the top of a
> > wrench in front of a blue USB symbol. Click on that and make sure
> > that UsbNet is selected rather than MMC and also that the "Enable
> > cpu-transparency" option is selected.
>
> > From here on out the n770 should be all set. What still needs to be
> > done is to setup the following on the host machine:
>
> > 1. USB networking scripts
>
> > 2. Scratchbox installation
>
> > 3. NFS server exports
>
> > 4. Scratchbox configuration
>
> > And maybe a couple of other things I've forgotten, (though there
> > are already a lot of details in just the 4 things above that I
> > still need to remind myself.)
>
>
> > ----------------------------------------------------------------------
>
>
> > _______________________________________________ maemo-developers
> > mailing list maemo-developers at maemo.org
> > https://maemo.org/mailman/listinfo/maemo-developers
>
>

_______________________________________________
maemo-developers mailing list
maemo-developers at maemo.org
https://maemo.org/mailman/listinfo/maemo-developers