could use help debugging black screen on RS780 (xf86-video-ati-6.13.0, radeon)
larry at doolittle.boa.org
Sun Jun 6 22:28:06 PDT 2010
On Fri, Jun 04, 2010 at 06:09:43AM -0700, Larry Doolittle wrote:
> The motherboard is a Biostar TA790GX XE, conveniently listed
> at Newegg as item N82E16813138140. The monitor (LCD panel)
> worked recently at 2048x1152 driven with a 10-year-old Matrox
> and the same VGA cable. It's a Samsung model 2343BWX.
> I have started downloading the files to install the i686 version
> of Debian Squeeze, instead of the amd64 version, just in case
> I have run into a word-length bug. I should have a chance to
> try that this weekend.
It was a long and winding path, but I think there's a short
answer: someone disabled the traditional herringbone start
pattern for the X server, so all my tests just starting X
(no clients) gave a black screen -- not even the stylized
"X" cursor I have known for literally 17 years. How am I
supposed to know the server is running?
When I finally ssh in and "DISPLAY=:0 xclock -geom +100+100",
I see the server works fine. Install a few clients, and the
system works fine! Well, still some rough edges, but I'll
have to deal with those another day. Unless someone can
explain why X no longer starts with a herringbone, or show
how to re-enable it, I consider this thread closed.
Sorry for the noise -- trust me, I went through many hours of
effort before discovering the (lack of) problem.
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