# Error -- intel\_do\_flush\_locked with V3.6.1git on Ubuntu 12.04 **URL:** \ **Category:** GNU Radio\ **Created:** [June 5, 2012, 4:41pm UTC](https://www.ruby-forum.com/t/error-intel-do-flush-locked-with-v3-6-1git-on-ubuntu-12-04/220298 "2012-06-05T16:41:13Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![aris](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/258eb7/32.png) [@aris](https://www.ruby-forum.com/u/aris)\ **Post date:** [June 5, 2012, 4:41pm UTC](https://www.ruby-forum.com/t/error-intel-do-flush-locked-with-v3-6-1git-on-ubuntu-12-04/220298/1 "2012-06-05T16:41:13Z")
Hello list readers, i tried to install on fresh LinuxMInt13 (a version of Ubuntu 12.04) to compile and install with the build\_gnuradio-script the new 3.6.1git version out of the git archives. (not josh) it seems to me a good idea to add the prereqs liborc-0.4-dev. This works really fine. Every thing seems to be ok, simple examples did work (i.e. tone generator) But examples with FunCube Dongle or RTL-DVB-TStick showed a “hard” error which closes the the actual running grc-program at start up time… Example: fcd\_nbfm\_rx.grc gives Using Volk machine: sse2\_32\_orc > > > gr\_fir\_fff: using SSE > > > intel\_do\_flush\_locked failed: Invalid argument > > > Done I had another installation based on SUSE 11.4 (self compiled packet) which works fine with FCD and RTL. As I did not find any solution for this reported error, I like to ask the “knowledge base” list readers 😉 Does anybody now of similar errors is it a new problem? Is there any advice to solve the error Does anybody know of a workaround for gnuradio since this error is reported with different other applications and system software. Your tips are very welcome Thanks in advance ## M. Hartje Prof. Dr.-Ing. Michael H. Labor Hochspannungstechnik / Labor elektrische Messtechnik Neustadtswall 30; D-28199 Bremen Tel +49 421 5905-3444 FAX +49 421 5905-3476 ---
**Author:** ![teddio](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/b3f665/32.png) [@teddio](https://www.ruby-forum.com/u/teddio)\ **Post date:** [June 5, 2012, 4:49pm UTC](https://www.ruby-forum.com/t/error-intel-do-flush-locked-with-v3-6-1git-on-ubuntu-12-04/220298/2 "2012-06-05T16:49:24Z")
On Tue, Jun 5, 2012 at 4:39 PM, Michael H. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Hello list readers, > > i tried to install on fresh LinuxMInt13 (a version of Ubuntu 12.04) to > compile and install with the build\_gnuradio-script the new 3.6.1git > version out of the git archives. (not josh) > > it seems to me a good idea to add the prereqs liborc-0.4-dev. That wouldn’t work with e.g. Ubuntu 11.04 because it has only orc 0.4.11 and both UHD and GNU Radio requires a version strictly greater than 0.4.11 > This works really fine. Every thing seems to be ok, simple examples did > work (i.e. tone generator) > > But examples with FunCube Dongle or RTL-DVB-TStick showed a “hard” error > which closes the the actual running grc-program at start up time.. > > Example: fcd\_nbfm\_rx.grc gives > Using Volk machine: sse2\_32\_orc > > > > > gr\_fir\_fff: using SSE > > > > intel\_do\_flush\_locked failed: Invalid argument I haven’t seen this error but I can assure you that the Funcube Dongle source will not work on systems with libusb-1.0.9. I will submit a patch for that soon - until then stick to the RTL device. Alex ---
**Author:** ![teddio](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/b3f665/32.png) [@teddio](https://www.ruby-forum.com/u/teddio)\ **Post date:** [June 5, 2012, 5:30pm UTC](https://www.ruby-forum.com/t/error-intel-do-flush-locked-with-v3-6-1git-on-ubuntu-12-04/220298/3 "2012-06-05T17:30:54Z")
> intel\_do\_flush\_locked failed: Invalid argument This is a problem with Intel graphics drivers. Switching to a software graphics stack ( Mesa ) worked for me.