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Re: HOW2 test a frame-buffer?

From pacman@kosh.dhis.org (Alan Curry)
Newsgroups comp.os.linux.hardware, alt.os.linux.slackware, alt.os.linux.debian
Subject Re: HOW2 test a frame-buffer?
Date 2012-01-06 08:57 +0000
Organization Aioe.org NNTP Server
Message-ID <je6d29$ck$1@speranza.aioe.org> (permalink)
References <je1ml9$3gs$1@dont-email.me> <je6aj6$gm$1@dont-email.me>

Cross-posted to 3 groups.

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In article <je6aj6$gm$1@dont-email.me>,  <no.top.post@gmail.com> wrote:
>
>-> mknod /dev/fb0  c  29  0
>-> ls -l /dev/fb0  == good
>-> cat <file>    >   /dev/fb0
>== <-bash: no such device: /dev/.static/dev/>
>
>So I'm wondering why, although `ls -l` sees </dev/*/fb0>,
>apparently `bash` does not ?
>

Pay close attention to the error message. "No such device" (ENODEV) isn't the
same as "No such file or directory" (ENOENT).

ENODEV usually means the corresponding kernel driver is not present. The
variant "No such device or address" (ENXIO) will sometimes appear when a
driver is loaded but the device itself wasn't detected.

You need to load the fb kernel module for your hardware.

-- 
Alan Curry

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Thread

HOW2 test a frame-buffer? no.top.post@gmail.com - 2012-01-04 14:10 +0000
  Re: HOW2 test a frame-buffer? no.top.post@gmail.com - 2012-01-06 08:15 +0000
    Re: HOW2 test a frame-buffer? pacman@kosh.dhis.org (Alan Curry) - 2012-01-06 08:57 +0000
      Re (2): HOW2 test a frame-buffer? no.top.post@gmail.com - 2012-01-06 16:26 +0000
    Re: HOW2 test a frame-buffer? "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2012-01-06 23:18 -0500
      Re (2): HOW2 test a frame-buffer? no.top.post@gmail.com - 2012-01-08 05:35 +0000
      Re (3): HOW2 test a frame-buffer? no.top.post@gmail.com - 2012-01-08 15:42 +0000

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