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Re: [Discuss-gnuradio] Trouble in x86_64 land?
From: |
Marcus D. Leech |
Subject: |
Re: [Discuss-gnuradio] Trouble in x86_64 land? |
Date: |
Thu, 13 May 2010 23:03:10 -0400 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.9) Gecko/20100330 Fedora/3.0.4-1.fc12 Thunderbird/3.0.4 |
On 05/10/2010 09:04 PM, Marcus D. Leech wrote:
>>
> Well, I just turned gl rendering back on, but displayed via an SSH
> tunnel back to a different machine
> with a different video card. Works just fine.
>
> So, some badness in GL I spoze. Not much that Gnu Radio can do about
> it, I guess.
>
>
Just to follow up on this.
The "x86_64" part seems indeed to have been a red herring.
I just installed a new video card in the machine that was giving trouble
when "gl" rendering was
turned on in Gnu Radio, and it works fine now.
The card I had in there was a ca 2000, ATI Rage 128 card. Not very
capable, to be sure. The
new card is a 8400 GS based card, and it works fine with the GL rendering.
Seems to me, that provoking a segfault is a not very polite way of
telling you that your video card
is too old and creaky to support GL. But maybe I'm just old-fashioned
:-) Furthermore, perhaps GL
should be able to detect this situation and "fall back" to something
that will work, but perhaps have
slower performance or sometime. [Talking quite distinctly through my
hat here, because I have only
the vaguest notion of how GL does what GL does].
So, for anyone else who runs into a problem where *any* of the Gnu Radio
example apps that use the
GUI, and the GUI is configured for "gl", and all you can get out of it
is a segmentation fault. Try
upgrading to a "modern" video card.
--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org