Buffalo WZR-1750DHP Flashing

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dusan2
DD-WRT Novice


Joined: 20 Jun 2013
Posts: 25

PostPosted: Sun Dec 22, 2013 19:26    Post subject: Buffalo WZR-1750DHP Flashing 23194 Reply with quote
hi
my Buffalo WZR-1750DHP Flashing dd-wrt to ver 23194 from 23138

*** do not flash if you do not have open router case and serial ttl port connection to your router to do nvram erase command to get control of router ***

still same problem as in my previous post after some config settings it will not reboot back up.

***
check_trx: start flash1.trx
Invalid boot block on disk
check_trx: exit flash1.trx
fw is broken
blinking led 2
***

and attachment of my buffalo wzr1750dhp router flash log wzr1750dhp2-23194-teraterm-dec22y13-1.txt

dusan2



wzr1750dhp-3-serial.jpg
 Description:
 Filesize:  199.56 KB
 Viewed:  34144 Time(s)

wzr1750dhp-3-serial.jpg



wzr1750dhp2-23194-teraterm-dec22y13-1.txt
 Description:

Download
 Filename:  wzr1750dhp2-23194-teraterm-dec22y13-1.txt
 Filesize:  272.57 KB
 Downloaded:  693 Time(s)



Last edited by dusan2 on Mon Dec 23, 2013 6:45; edited 2 times in total
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messerchmidt
DD-WRT User


Joined: 11 Jan 2012
Posts: 164
Location: Canada

PostPosted: Mon Dec 23, 2013 5:40    Post subject: Reply with quote
can someone post a picture of the board with the serial and jtag pins marked please? thanks

EDIT: thanks
messerchmidt
DD-WRT User


Joined: 11 Jan 2012
Posts: 164
Location: Canada

PostPosted: Tue Dec 24, 2013 7:27    Post subject: Re: Buffalo WZR-1750DHP Flashing 23194 Reply with quote
dusan2 wrote:
hi
my Buffalo WZR-1750DHP Flashing dd-wrt to ver 23194 from 23138

*** do not flash if you do not have open router case and serial ttl port connection to your router to do nvram erase command to get control of router ***

still same problem as in my previous post after some config settings it will not reboot back up.

***
check_trx: start flash1.trx
Invalid boot block on disk
check_trx: exit flash1.trx
fw is broken
blinking led 2
***

and attachment of my buffalo wzr1750dhp router flash log wzr1750dhp2-23194-teraterm-dec22y13-1.txt

dusan2


sorry, but how did you get this thing open?
messerchmidt
DD-WRT User


Joined: 11 Jan 2012
Posts: 164
Location: Canada

PostPosted: Wed Dec 25, 2013 8:49    Post subject: Reply with quote
maybe you could dump the stock CFE and serial flash of the router on 2.13 and post it here? if same was brought to brainslayer or kong's attention, I am sure they could push out a working version for it.
BrainSlayer
Site Admin


Joined: 06 Jun 2006
Posts: 6684
Location: Dresden, Germany

PostPosted: Thu Dec 26, 2013 12:58    Post subject: Reply with quote
has someone ever tried to flash with with cfe tftp?
_________________
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Yummee:
Linux DD-WRT 4.9.13 #17 SMP PREEMPT Wed Mar 8 00:16:54 CET 2017 armv7l DD-WRT
root@DD-WRT:/sys# nvram get DD_BOARD
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messerchmidt
DD-WRT User


Joined: 11 Jan 2012
Posts: 164
Location: Canada

PostPosted: Fri Dec 27, 2013 7:11    Post subject: Reply with quote
BrainSlayer wrote:
has someone ever tried to flash with with cfe tftp?


I can try that this weekend - use the latest flash or?
dusan2
DD-WRT Novice


Joined: 20 Jun 2013
Posts: 25

PostPosted: Sat Dec 28, 2013 3:55    Post subject: Buffalo WZR-1750DHP Flashing with cfe tftp Reply with quote
hi
Buffalo WZR-1750DHP Flashing with cfe tftp
i did and it help me recover my first Buffalo
WZR-1750DHP that was asking for "firmware.ram" and crashing httpd server. now is recovered and i have web page showing.
*
BrainSlayer send me a note what file to send and how to send the file
*
first you need to enter the consoly by ctrl+c . then just do
"flash -noheader : nflash1.trx" and hit enter
then you can send the file with tftp to the device. use a standard webupgrade dd-wrt image. you can't use the buffalo factory firmware here since its encrypted
*
and this how i flash dd-wrt 23204 webfile
used tftp64 set timeout to 60sec setup my static ip to 192.168.11.5 client ip to 192.168.11.1
set file location to directory where is mydd-wrt 23204, in serial console mode of cfe i paste flash -noheader : nflash1.trx and hit enter, and in 3sec
i hit button put in tftp64 screen server and seen it go
loading a new image, in cfe terminal screen.after image load i type reboot and it did it
come up on ip 192.168.1.1 so you need to change your ip for dd-wrt default page. so you do not need a "firmware.ram" image to recover your router.
http://kin.klever.net/pumpkin/binaries
http://www.jounin.net/tftpd32_download.html
usually for flashing i use pumkin 2.7.3 tftp if i can, this time i used tftpd64. other tftp server can work.
***
Buffalo WZR-1750DHP Flashing with cfe tftp
*
still same problem as in my previous post after some config settings it will not reboot back up.

***
check_trx: start flash1.trx
Invalid boot block on disk
check_trx: exit flash1.trx
fw is broken
blinking led 2
***

after some more tests it looks like if i do not modify ssh settings it will reboot normally
setup timeserver us.pool.ntp.org,wan management port 64080,wifi 2.4ghz ng-mix,5ghz ac only,screen refresh 10sec,wifi power 1,wifi security wpa2 aes,and password
if i add ssh and port number 64022 it will not reboot.
*
and my cfe flash recovery log

dusan2



wzr1750dhp-recovery-23204-teratermdec28y13-1.txt
 Description:
my router recovery cfe flash log wzr1750dhp-recovery-23204-teratermdec28y13-1.txt

Download
 Filename:  wzr1750dhp-recovery-23204-teratermdec28y13-1.txt
 Filesize:  267.52 KB
 Downloaded:  663 Time(s)

<Kong>
DD-WRT Guru


Joined: 15 Dec 2010
Posts: 3860
Location: Germany

PostPosted: Sat Dec 28, 2013 9:04    Post subject: Re: Buffalo WZR-1750DHP Flashing with cfe tftp Reply with quote
dusan2 wrote:
hi
Buffalo WZR-1750DHP Flashing with cfe tftp
i did and it help me recover my first Buffalo
WZR-1750DHP that was asking for "firmware.ram" and crashing httpd server. now is recovered and i have web page showing.
*
BrainSlayer send me a note what file to send and how to send the file
*
first you need to enter the consoly by ctrl+c . then just do
"flash -noheader : nflash1.trx" and hit enter
then you can send the file with tftp to the device. use a standard webupgrade dd-wrt image. you can't use the buffalo factory firmware here since its encrypted
*
and this how i flash dd-wrt 23204 webfile
used tftp64 set timeout to 60sec setup my static ip to 192.168.11.5 client ip to 192.168.11.1
set file location to directory where is mydd-wrt 23204, in serial console mode of cfe i paste flash -noheader : nflash1.trx and hit enter, and in 3sec
i hit button put in tftp64 screen server and seen it go
loading a new image, in cfe terminal screen.after image load i type reboot and it did it
come up on ip 192.168.1.1 so you need to change your ip for dd-wrt default page. so you do not need a "firmware.ram" image to recover your router.
http://kin.klever.net/pumpkin/binaries
http://www.jounin.net/tftpd32_download.html
usually for flashing i use pumkin 2.7.3 tftp if i can, this time i used tftpd64. other tftp server can work.
***
Buffalo WZR-1750DHP Flashing with cfe tftp
*
still same problem as in my previous post after some config settings it will not reboot back up.

***
check_trx: start flash1.trx
Invalid boot block on disk
check_trx: exit flash1.trx
fw is broken
blinking led 2
***

after some more tests it looks like if i do not modify ssh settings it will reboot normally
setup timeserver us.pool.ntp.org,wan management port 64080,wifi 2.4ghz ng-mix,5ghz ac only,screen refresh 10sec,wifi power 1,wifi security wpa2 aes,and password
if i add ssh and port number 64022 it will not reboot.
*
and my cfe flash recovery log

dusan2


Well if you had a look at your previous logfiles you would have noticed, that the problem is only the cpu clock, as soon as you touch the Admin page (Management.asp) your cpur clock gets set and then your problems start, it will reboot constantly modifying the cpu clock:-)

That is why I removed overclocking from my builds, because on new units overclocking works even worse than on older units, e.g. no ram clock is set. Thus my build should have worked since weeks on the 1750:-)

_________________
KONG PB's: http://www.desipro.de/ddwrt/
KONG Info: http://tips.desipro.de/
messerchmidt
DD-WRT User


Joined: 11 Jan 2012
Posts: 164
Location: Canada

PostPosted: Sat Dec 28, 2013 20:15    Post subject: Reply with quote
kong can you post a working file with the cpu clock fixed at 800mhz? :^)
LOM
DD-WRT Guru


Joined: 28 Dec 2008
Posts: 7620

PostPosted: Sun Dec 29, 2013 3:23    Post subject: Re: Buffalo WZR-1750DHP Flashing with cfe tftp Reply with quote
<Kong> wrote:
dusan2 wrote:

***

***
check_trx: start flash1.trx
Invalid boot block on disk
check_trx: exit flash1.trx
fw is broken
blinking led 2
***


Well if you had a look at your previous logfiles you would have noticed, that the problem is only the cpu clock, as soon as you touch the Admin page (Management.asp) your cpu clock gets set and then your problems start, it will reboot constantly modifying the cpu clock:-)

That is why I removed overclocking from my builds, because on new units overclocking works even worse than on older units, e.g. no ram clock is set. Thus my build should have worked since weeks on the 1750:-)


Have to disagree Kong, the clock error is only for the ddram clock and it will not cause a reboot loop, it will only change the routers performance.
If the clock is way too wrong then there would be a crash already in the boot loader and long before the boot attempt.

The cause for the reboot loop is given and is correct - invalid boot block.
I have a theory of what is happening..

@dusan2
Can you please do an nvram show all from within the CFE before booting ddwrt and then an nvram show after ddwrt has booted. Upload both of them here.

_________________
Kernel panic: Aiee, killing interrupt handler!
dusan2
DD-WRT Novice


Joined: 20 Jun 2013
Posts: 25

PostPosted: Sun Dec 29, 2013 5:09    Post subject: Buffalo WZR-1750DHP Flashing nvram logs Reply with quote
hi
Buffalo WZR-1750DHP Flashing nvram logs
is this it ?

wzr1750dhp-nvram-boot-teraterm-dec28y13-1.txt

dusan2



wzr1750dhp-nvram-boot-teraterm-dec28y13-1.txt
 Description:
wzr1750dhp-nvram-boot-teraterm-dec28y13-1.txt

Download
 Filename:  wzr1750dhp-nvram-boot-teraterm-dec28y13-1.txt
 Filesize:  95.62 KB
 Downloaded:  317 Time(s)

LOM
DD-WRT Guru


Joined: 28 Dec 2008
Posts: 7620

PostPosted: Sun Dec 29, 2013 6:25    Post subject: Re: Buffalo WZR-1750DHP Flashing nvram logs Reply with quote
dusan2 wrote:
hi
Buffalo WZR-1750DHP Flashing nvram logs
is this it ?


yes thanks and with that my theory of the cause has failed.
The 2 nvram areas are identical except for one variable which is unimportant, action_service=management

_________________
Kernel panic: Aiee, killing interrupt handler!
<Kong>
DD-WRT Guru


Joined: 15 Dec 2010
Posts: 3860
Location: Germany

PostPosted: Sun Dec 29, 2013 8:41    Post subject: Re: Buffalo WZR-1750DHP Flashing with cfe tftp Reply with quote
LOM wrote:
<Kong> wrote:
dusan2 wrote:

***

***
check_trx: start flash1.trx
Invalid boot block on disk
check_trx: exit flash1.trx
fw is broken
blinking led 2
***


Well if you had a look at your previous logfiles you would have noticed, that the problem is only the cpu clock, as soon as you touch the Admin page (Management.asp) your cpu clock gets set and then your problems start, it will reboot constantly modifying the cpu clock:-)

That is why I removed overclocking from my builds, because on new units overclocking works even worse than on older units, e.g. no ram clock is set. Thus my build should have worked since weeks on the 1750:-)


Have to disagree Kong, the clock error is only for the ddram clock and it will not cause a reboot loop, it will only change the routers performance.
If the clock is way too wrong then there would be a crash already in the boot loader and long before the boot attempt.

The cause for the reboot loop is given and is correct - invalid boot block.
I have a theory of what is happening..

@dusan2
Can you please do an nvram show all from within the CFE before booting ddwrt and then an nvram show after ddwrt has booted. Upload both of them here.


LOM, on this one you are right, but the output on page 4 shows a reboot loop in which clock gets changed at every boot.

And the above snipped with flash error does not help. If it is an offset problem, e.g. wrong start adress of linux partition, then it will work but may be overritten with any nvram change or another flash via webif.

Thus with this error it is neccessary to have serioul output with oem fw and then with dd-wrt after flashing via tftpd before the invalid boot block error shows.

_________________
KONG PB's: http://www.desipro.de/ddwrt/
KONG Info: http://tips.desipro.de/
messerchmidt
DD-WRT User


Joined: 11 Jan 2012
Posts: 164
Location: Canada

PostPosted: Sun Dec 29, 2013 9:34    Post subject: Reply with quote
so this unit needs to be serial flashed or?!

how do we make it work? the stock firmware is god aweful
LOM
DD-WRT Guru


Joined: 28 Dec 2008
Posts: 7620

PostPosted: Sun Dec 29, 2013 11:27    Post subject: Reply with quote
@dusan2
Can you please try Kongs build r23200 from here:

http://www.desipro.de/ddwrt/K3-AC-Arm/

which has user clock frequency setting disabled.
I need to narrow down the possible reasons for your boot problem and want to be sure if it is related to overclocking enabled in Brainslayers build.

_________________
Kernel panic: Aiee, killing interrupt handler!
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