here is a simple test case that reproduces the issue on my machine:
dagg@NCC-5001-D ~/workspace $ cat open_example.c
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
int main()
{
char *param1 = "ok";
char *param2 = ".";
int filedesc = open("/dev/dri/card1", O_RDWR, 0);
if (filedesc) {
param1 = "ERROR: ";
param2 = strerror(errno);
}
printf("fd = %d, status = %s%s\n", filedesc, param1, param2);
close(filedesc);
return 0;
}dagg@NCC-5001-D ~/workspace $ gcc open_example.c -o open_example &&
./open_example
fd = -1, status = ERROR: Invalid argument
On Friday, March 14, 2014 4:22 PM, "stompdagg...@yahoo.com"
<stompdagg...@yahoo.com> wrote:
On Tuesday, March 11, 2014 8:45 AM, "stompdagg...@yahoo.com"
<stompdagg...@yahoo.com> wrote:
>On Tuesday, March 11, 2014 5:16 AM, Michel Dänzer <mic...@daenzer.net> wrote:
>On Mon, 2014-03-10 at 08:23 -0700, stompdagg...@yahoo.com wrote:
>
>>
>>
>> >On Monday, March 10, 2014 5:58 AM, Michel Dänzer <mic...@daenzer.net>
>> wrote:
>>
>> >On Sam, 2014-03-08 at 11:41 -0800, stompdagg...@yahoo.com wrote:
>> >
>> >> >On Sat, Mar 8, 2014 at 2:56 AM, stompdagg...@yahoo.com
>> >> >
>> >> >> [ 51.829] (EE) RADEON(0): [drm] Failed to open DRM device for
>> >> >> pci:0000:06:00.0: No such file or directory
>> >
>> >'No such file or directory' sounds like something is deleting
>>
>your /dev/dri/card* files, or not creating them in the first place.
>> >Maybe check your udev setup.
>> >
>> >If it only happens with a 3.13 kernel but not with a 3.12 one,
>> another
>> >option is to bisect the kernel.
.>
.> Greetings Michel,
.>
.> dri node do exists, see:
>> dagg@NCC-5001-D ~ $ ll /dev/dri
>> total 0
>> crw-rw----+ 1 root video 226, 0 Mar 10 09:27 card0
>> crw-rw----+ 1 root video 226, 1 Mar 10 09:27 card1
>> crw-rw----+ 1 root video 226, 2 Mar 10 09:27 card2
>>
crw-rw---- 1 root video 226, 64 Mar 10
09:27 controlD64
>> crw-rw---- 1 root video 226, 65 Mar 10 09:27 controlD65
>> crw-rw---- 1 root video 226, 66 Mar 10 09:27 controlD66
>>
>> I think that the way to find the cause on my part is to check the
>> origin of that msg in Xorg.log.
>>
>> is that a xserver msg or xf86-video-ati msg?>
>
>The message is from the radeon driver, but it's because drmOpen() in
>libdrm fails. It would indeed be interesting to track down where the 'No
>such file or directory' error originates from.
will do, when I'll have more info, I'll update.
Greetings Michel,
I've tried to track the source if that error,
I've enabled dbg prints in libdrm and found this:
(II) [KMS] Kernel modesetting enabled.
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is 11, (OK)
drmOpenByBusid: Searching for BusID pci:0000:06:00.0
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is 11, (OK)
drmOpenByBusid: drmOpenMinor returns 11
drmOpenByBusid: drmGetBusid reports pci:0000:00:02.0
drmOpenDevice: node name is /dev/dri/card1
drmOpenDevice: open result is -1, (Invalid argument)
drmOpenByBusid: drmOpenMinor returns -22
drmOpenDevice: node name is /dev/dri/card2
drmOpenDevice: open result is -1, (Invalid argument)
looking in the code I see this:
fd = open(buf, O_RDWR, 0);
drmMsg("drmOpenDevice: open result is %d, (%s)\n",
fd, fd < 0 ? strerror(errno) :
"OK");
if (fd >= 0)
return fd;
I think that the issue might be that the file cannot be opened for that mode as
the path is printed above and it is ok.
any ideas what might it be?
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