# No revision detected MB EEPROM must be reprogrammed! **URL:** \ **Category:** GNU Radio\ **Created:** [August 11, 2015, 8:19am UTC](https://www.ruby-forum.com/t/no-revision-detected-mb-eeprom-must-be-reprogrammed/242963 "2015-08-11T08:19:24Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Sadaf\_N](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/858c86/32.png) [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Post date:** [August 11, 2015, 8:19am UTC](https://www.ruby-forum.com/t/no-revision-detected-mb-eeprom-must-be-reprogrammed/242963/1 "2015-08-11T08:19:24Z")
[Note: The reason I’m posting this here is because I’m not sure whether this is solely a UHD problem or perhaps because of some ‘suboptimal’ communication between GNURadio & UHD, and I’ve seen some earlier posts on this list resolving UHD-related issues.If this is off-topic and does not belong here, I apologize!] Dear all, I’ve been working with GNURadio & UHD/USRP for quite some time now. All of a sudden I started seeing the following messages when running my flowgraph, on which I couldn’t find any info: UHD Warning: No revision detected MB EEPROM must be reprogrammed! At the time I was using UHD 3.9. Anyhow, a colleague told me that he also used to have problems with too new versions of UHD, but that those disappeared as he started to use UHD 003.008.005. So I erased all traces of GNURadio & UHD and reinstalled from scratch using the build-gnuradio script, now specifying that I want UHD version 003.008.005 installed. Furthermore, I ran the usrp\_x3xx\_fpga\_burner tool to rewrite the EEPROM of the X300. Now, when I wish to run my GNURadio flowgraph, I get the following return messages: linux; GNU C++ version 4.8.4; Boost\_105400; UHD\_003.008.005-0-g7efbd15b – X300 initialization sequence… – Determining maximum frame size… 8000 bytes. – Setup basic communication… – Loading values from EEPROM… – Setup RF frontend clocking… UHD Warning: No revision detected MB EEPROM must be reprogrammed! UHD Warning: Defaulting to X300 RevD Clock Settings. This will result in non-optimal lock times. Traceback (most recent call last): File “/home/matija/bin/phantom2\_mod.py”, line 270, in tb = phantom2\_mod() File “/home/matija/bin/phantom2\_mod.py”, line 92, in **init** channels=range(1), File “/usr/local/lib/python2.7/dist-packages/gnuradio/uhd/ **init**.py”, line 122, in constructor\_interceptor return old\_constructor(\*args) File “/usr/local/lib/python2.7/dist-packages/gnuradio/uhd/uhd\_swig.py”, line 2282, in make return \_uhd\_swig.usrp\_sink\_make(\*args) RuntimeError: RuntimeError: Unsupported board revision number: 18446744073709382690. The maximum board revision number supported in this version is 6. Please update your UHD version. > > > Done (return code 1) Did anyone else experience the same problems? Can I not use UHD 003.008.005 with the X300? I’m assuming that something weird happened during the installation as the board revision number is so odd… I’m using an USRP X300 with a UBX-160 daughterboard, connected over 10Gb ethernet. Gnuradio version: 3.7.7.2. My system is 64bit Ubuntu 14.04. Any help is greatly appreciated! Kind regards, Mat ---
**Author:** ![okcomputer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/o/b38774/32.png) [@okcomputer](https://www.ruby-forum.com/u/okcomputer)\ **Post date:** [August 11, 2015, 4:41pm UTC](https://www.ruby-forum.com/t/no-revision-detected-mb-eeprom-must-be-reprogrammed/242963/2 "2015-08-11T16:41:50Z")
Hi Matija, I’m sorry but we are still not 100% sure how this might have happened but the team is working on figuring it out. In the meantime you might want to rewrite the value in the EEPROM. In order to do that you need to do the following: 1.) comment the hw\_rev check in x300\_impl.cpp (located in uhd/host/lib/usrp/x300) (Lines 625-632) 2.) rebuild uhd 3.) run usrp\_burn\_mb\_eeprom --values=“revision=6” After that you should be able to switch back to stock UHD without issues. Again, Sorry for your inconvenience. I hope that gets you going. Cheers, Julian On Tue, Aug 11, 2015 at 8:18 AM, Matija Ciganovic [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) ---
**Author:** ![okcomputer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/o/b38774/32.png) [@okcomputer](https://www.ruby-forum.com/u/okcomputer)\ **Post date:** [August 13, 2015, 3:19am UTC](https://www.ruby-forum.com/t/no-revision-detected-mb-eeprom-must-be-reprogrammed/242963/3 "2015-08-13T03:19:25Z")
Hi Matija, thank you for your information. Just to get it right, did you run the command usrp\_burn\_mb\_eeprom --values=“revision=6” with your corrupted USRP and after that the error still persists? Cheers, Julian On Tue, Aug 11, 2015 at 5:20 PM, Matija Ciganovic [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)