TV D-Series Firmware Downgrade (SamyGO Proof of Concept)

[Rukusx7]

I'm now kicking myself in the ass for NOT saving the money and buying a un46d6000. Instead I bought the un46d6300 for 300 more. I find out pretty much the same TV. The difference? A virtually unusable web browser. The other difference? T-GASFAKUC firmware on the 6300 and not the T-GASAKUC downgrade-able firmware like the un46d6000 has.

i hope we can add my model for Firmware Downgrade. It would be greatly appreciated.

Thank You.

[akirakaneda]

Hye

I am trying to downgrade my UE46D6530 firmware.

Here is the information of my TV.

Model: UE46D6530
current Firmware version: T-GASDEUC-1018.0

Steps I followed:

1. Set the IP address --> 192.168.1.44
2. Set Subnet mask --> 255.255.255.0
3. Set IP router --> 192.168.1.1
3. Set DNS server --> 46.4.199.222
4. Turned off tv with remote, turned it back on (tried pulling the plug too)
5. Went to menu --support --> software upgrade--> by online

It just tells me "No Software to upgrade"

Help me please

greetings

[relativo]

thanks, great job!

I downgrade D6100 firmware (T-GAS6DEUC) from 1020.1 to 1011.5 successfully with your procedure.

[papajany]

hi SamyGO
how r u? i hope u gonna be fine, u doing nice job, i bought a samsung 3d smart tv Model: ua46d6400ur last week, and yesterday i upgrade its firmware to t-gas6daac-1022.0, before it was something like 1019, i was searching on google for its apps, found ur site and know about ur samygo, now i want to use ur apps, want to downgrade my firmware to use ur apps, plz provide me some information

best regards

[juusso]

hi, all what you need for downgrade is on first post of this topic. Good luck.

[thwalker3]

Did the DNS server go down? Was going to try a downgrade but can't get it to resolve anything...

[thwalker3]

Nevermind, DNS is resolving but something in the current fw on my tv makes it think "the internet is down" when I point to your DNS server. Doesn't look like you actually have fw posted for my tv (UN46ES7500) anyway as when I redirect the openapi "fw check" http request to your servers by hand, I get "ok" back.

[thwalker3]

Ah, I see what is happening... my TV appears to be requesting a recursive lookup for http://www.samsung.com. It appears that your DNS server is configured to deny recursive lookup requests but the TV is expecting to find one that will...

Against google's DNS:

Code: Select all

$ dig http://www.samsung.com @8.8.8.8 +recurse

; <<>> DiG 9.9.2-RedHat-9.9.2-2.fc18 <<>> http://www.samsung.com @8.8.8.8 +recurse
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 22559
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;www.samsung.com.		IN	A

;; ANSWER SECTION:
http://www.samsung.com.	289	IN	CNAME	http://www.samsung.com.edgekey.net.
http://www.samsung.com.edgekey.net. 21589 IN	CNAME	http://www.samsung.com.edgekey.net.globalredir.akadns.net.
http://www.samsung.com.edgekey.net.globalredir.akadns.net. 889	IN CNAME e1717.b.akamaiedge.net.
e1717.b.akamaiedge.net.	9	IN	A	173.223.183.41

;; Query time: 20 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Mon Nov 26 10:44:16 2012
;; MSG SIZE  rcvd: 195

Against yours:

Code: Select all

$ dig http://www.samsung.com @46.4.199.222 +recurse

; <<>> DiG 9.9.2-RedHat-9.9.2-2.fc18 <<>> http://www.samsung.com @46.4.199.222 +recurse
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 52226
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;www.samsung.com.		IN	A

;; Query time: 104 msec
;; SERVER: 46.4.199.222#53(46.4.199.222)
;; WHEN: Mon Nov 26 10:42:52 2012
;; MSG SIZE  rcvd: 44

Sounds like you need to allow recursive lookups to make some of the newer TVs happy.

[thwalker3]

Or perhaps it isn't the recursion option... lookups for "www.samsungotn.net" (the host you redirect to try to trick the firmware update) against your DNS seem to work with recursion specified or not. But I never get there because the "test your internet connection" after modifying the DNS settings on the TV tries to lookup "www.samsung.com" which your server doesn't resolve (as shown in the earlier dig output). The TV then "disables" (greys out) the "update firmware online" option.

Anyway, I can setup my own DNS to resolve "www.samsung.com" as the TV expects but still point "www.samsungotn.net" to your server but, as I said before, it looks like you don't host a "downgrade" for me TV as:

"http://46.4.199.222/openapi/tv/T-ECPAKU ... 7/m_notice"

returns an xml file with:

<rsp stat="ok"/>

which I gather means "no update available"

[juusso]

You should skip internet connection testing, because it always fails if use our dns.