s2_unscramble - Unscramble for Series 2

[BeagleBoy]

By popular request, from the ScrambleThis Labs, we present unscramble for Series 2 TiVo boxes.

Your timing couldn't have been better! I had to replace my drive, and didn't have time to rehack my system before I needed to record a show I had been waiting for. I had just resigned myself to grabbing it via video capture, when you made your post. Unscrambling (and extraction) were flawless.

Thanks again!

[rocketman24]

For those interested in running this on 4.01b, here's a kernel compiled with gcc 3.0 from the TiVo-4.0-linux-2.4 sources. It's got the fpu patch, the lba48 patch, the s2-unscramble patch, and CONFIG_FILTER and CONFIG_NETFILTER are turned off. I use it with TiVo software version 4.0.1b on a S2 SA.

Jamie,

I don't want to make any assumptions... so I'll ask just to make sure I don't screw something up. I've got a S2 DTV Tivo (Hughes SD-DVR40) running 4.01b.

Can I safely install this on my box? Is it as simple as replacing the current vmlinux.px file?

Thanks in advance!

[JohnSorTivo]

Jamie,

I don't want to make any assumptions... so I'll ask just to make sure I don't screw something up. I've got a S2 DTV Tivo (Hughes SD-DVR40) running 4.01b.

Can I safely install this on my box? Is it as simple as replacing the current vmlinux.px file?

Thanks in advance!

Not Jamie, but...Since you're running 4.x on a RID unit, this means you are already monte'ing, and as such, yes, all you have to do is replace the current vmlimux.px file you are monte'ing into with the one Jamie has attached.

edit:
that kernel will not work with rid boxes

[Jamie]

Not Jamie, but...Since you're running 4.x on a RID unit, this means you are already monte'ing, and as such, yes, all you have to do is replace the current vmlimux.px file you are monte'ing into with the one Jamie has attached.

You minor point: because I turned off CONFIG_FILTER, this kernel won't work with DHCP. You have to assign a static IP address. Eventually I'll update the post with one that has CONFIG_FILTER back on, since, as ADH observed, CONFIG_FILTER doesn't seem to affect performance the way CONFIG_NETFILTER does.

{Edit: this kernel *will not* work with RID boxes}

[rc3105]

For those interested in running this on 4.01b, here's a kernel compiled with gcc 3.0 from the TiVo-4.0-linux-2.4 sources. It's got the fpu patch, the lba48 patch, the s2-unscramble patch, and CONFIG_FILTER and CONFIG_NETFILTER are turned off. I use it with TiVo software version 4.0.1b on a S2 SA.

but does it have the uma6 patch that rocketman24 needs?

[Jamie]

but does it have the uma6 patch that rocketman24 needs?

nope. ....

[rc3105]

Jamie,

I don't want to make any assumptions... so I'll ask just to make sure I don't screw something up. I've got a S2 DTV Tivo (Hughes SD-DVR40) running 4.01b.

Can I safely install this on my box? Is it as simple as replacing the current vmlinux.px file?

Thanks in advance!

to answer your question - no, that kernel build doesn't work with rid dtivos

[rocketman24]

Thanks for the heads up. I really thought when I posted my question I was being over cautious... glad I asked.

Anyway, I assigned static IP to my box... so that part won't be problem. I'll wait to find one that's compatible for my box.

[JohnSorTivo]

but does it have the uma6 patch that rocketman24 needs?

Dang. Didn't think about that. Sorry for the mis-information.

[Jamie]

Thanks for the heads up. I really thought when I posted my question I was being over cautious... glad I asked.

Anyway, I assigned static IP to my box... so that part won't be problem. I'll wait to find one that's compatible for my box.

If there is demand, and if the uma6 patch is readily available, I can build a unscramble kernel that also includes it and the other patches Riley listed here. I don't have a rid unit though, so I can't really test it.

{edit: I've got all the right patches and built a test kernel. I'll test it on my non rid hardware, and if it works I'll replace the one above with this uma6 friendly version.}

[Jamie]

Here's a 2.4.18 unscramble kernel that may work on 4.0 rid boxes. I first applied "bigpatch-2.4.18.patch" from here, then applied the ide-disk.c.unscramble.diff patch posted by ScrambleThis. I also turned off CONFIG_NETFILTER (but not CONFIG_FILTER). Note that you need a fuzz of 3 or more (-F3) to apply the ide-disk patch to the 4.0 TiVo kernel.

I tested this on my S2SA. I don't have a rid box. If someone tries this on a 4.0 RID box and it works for you, please PM me (no need to post), and I'll update the kernel posted earlier in the thread and mark it as ok for RID.

{Update: mmoore99 reports that this kernel works fine on his RID SDVR-80, though he didn't try unscrambling anything.}

[mmoore99]

Here's a 2.4.18 unscramble kernel that may work on 4.0 rid boxes.

Jamie, is it ok to use this kernel in conjunction with the tivoapp "superpatch" since it also disables scrambling?

[Jamie]

Jamie, is it ok to use this kernel in conjunction with the tivoapp "superpatch" since it also disables scrambling?

The kernel patch discussed in this thread provides a mechanism for unscrambling existing scrambled shows. The tivoapp "superpatch" (really the nocso patch) is a patch that allows new shows to be recorded without scrambling. The two serve different purposes.

The only known conflict between the two (to me anyway) is that shows that you unscramble with the unscramble kernel may continue to have cso keys set for them in their metadata. This can cause playback problems if you don't clear the cso keys. Search for ciphercheck and csoscout for ways to deal with this.

[rbreding]

Jaime, this is what I have in my serial output when testing on a sd-dvr40 (RID)




## MIPS ## arch-specific shell functions defined
starting test.conf
starting /init/001_bash.init
starting /init/010_lba48.init
bash: no job control in this shell
bash-2.02# Warning: kernel-module version mismatch
/init/kmonte.o was compiled for kernel version 2.4.4-TiVo-3.0
while this kernel is version 2.4.20
monte: Two-kernel Monte for MIPS (Version 0.1)
monte: MuscleNerd (MIPS version), Erik Arjan Hendriks (x86 version)
monte: Operation not permitted
monte failed - starting bash on the serial port
bash: no job control in this shell



EDIT: Just as a followup I have a kill'd 3.1.1c installed to the boot partitions.

[Jamie]

bash-2.02# Warning: kernel-module version mismatch
/init/kmonte.o was compiled for kernel version 2.4.4-TiVo-3.0
while this kernel is version 2.4.20

It appears to me that your boot kernel (the one installed in /dev/hda3 or /dev/hda6) is a 2.4.20 kernel. Perhaps from 3.1.5? You should be using the 3.1.1c killhdinitrd kernel, but it appears you are not.

This is before you are even getting to the point where you'd monte to the kernel I built.

Did you have a working monte setup before? What else did you change?