Hi Haihao,
Am 09.10.2014 um 04:43 schrieb Xiang, Haihao:
Hi,
According to your log, drmGetClient() is called twice.
ioctl(3, 0xc0286405, 0x7fffe00d6260) = 0
ioctl(3, 0xc0286405, 0x7fffe00d6260) = -1
Is /dev/dri/card0 using by other processes ? If yes, non-root user (non
master user indeed) can't use /dev/dri/card0, unless you use render
node. You can check /dev/dri/card0 is used or not by lsof:
$> sudo lsof /dev/dri/card0
Thanks, this was the reason. plymouthd used /dev/dri/card0.
After stopping this daemon, everything worked.
Regards,
Thomas
Thanks
Haihao
Hi Gwenole,
Am 08.10.2014 um 11:57 schrieb Gwenole Beauchesne:
Hi Thomas,
2014-10-08 11:30 GMT+02:00 Thomas Scheuermann <[email protected]>:
Hi,
how can I use libva as non-root user on a system without X running?
- Check what group /dev/dri/card<n> or /dev/dri/renderD<n|0x80> belongs to
- Add your user to that group
My user is in the video group and the device is:
crw-rw---- 1 root video 226, 0 Oct 8 09:16 /dev/dri/card0
My kernel is 3.14
But it doesn't work.
My system is a debian wheezy with some backports like the kernel.
e.g. on a Ubuntu system, /dev/dri/card0 is in the "video" group. If
you want a user X to access to the device, just add user X to the
"video" group too.
Note: starting with Kernel >= 3.15, and with libva from git master,
you can use the device without authentication. This means that you can
have user Y logged in, and who has started a display server, while
still allowing user X to remote connect and use the device.
If I run vainfo as a non-root user, I get
$ vainfo
error: XDG_RUNTIME_DIR not set in the environment.
error: can't connect to X server!
libva info: VA-API version 0.35.1
libva info: va_getDriverName() returns 1
libva error: va_getDriverName() failed with operation
failed,driver_name=i965
vaInitialize failed with error code 1 (operation failed),exit
If I do the same as root, I get
# vainfo
error: XDG_RUNTIME_DIR not set in the environment.
error: can't connect to X server!
libva info: VA-API version 0.35.1
libva info: va_getDriverName() returns 0
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
libva info: Found init function __vaDriverInit_0_35
libva info: va_openDriver() returns 0
vainfo: VA-API version: 0.35 (libva 1.3.1)
vainfo: Driver version: Intel i965 driver for Intel(R) Haswell Mobile -
1.3.2
vainfo: Supported profile and entrypoints
VAProfileMPEG2Simple : VAEntrypointVLD
VAProfileMPEG2Simple : VAEntrypointEncSlice
VAProfileMPEG2Main : VAEntrypointVLD
VAProfileMPEG2Main : VAEntrypointEncSlice
VAProfileH264ConstrainedBaseline: VAEntrypointVLD
VAProfileH264ConstrainedBaseline: VAEntrypointEncSlice
VAProfileH264Main : VAEntrypointVLD
VAProfileH264Main : VAEntrypointEncSlice
VAProfileH264High : VAEntrypointVLD
VAProfileH264High : VAEntrypointEncSlice
VAProfileVC1Simple : VAEntrypointVLD
VAProfileVC1Main : VAEntrypointVLD
VAProfileVC1Advanced : VAEntrypointVLD
VAProfileNone : VAEntrypointVideoProc
VAProfileJPEGBaseline : VAEntrypointVLD
The difference is in the ioctl to /dev/dri/card0. As non-root user I get:
ioctl(3, 0xc0406400, 0x14786c0) = 0
ioctl(3, 0xc0406400, 0x14786c0) = 0
ioctl(3, 0x80046402, 0x7fffe00d6300) = 0
ioctl(3, 0xc0286405, 0x7fffe00d6260) = 0
ioctl(3, 0xc0286405, 0x7fffe00d6260) = -1 EINVAL (Invalid argument)
futex(0x7f549de7a0ec, FUTEX_WAKE_PRIVATE, 2147483647) = 0
ioctl(3, 0x40046411, 0x7fffe00d62e0) = -1 EACCES (Permission denied)
write(2, "libva info: va_getDriverName() r"..., 41libva info:
va_getDriverName() returns 1
) = 41
write(2, "libva error: va_getDriverName() "..., 78libva error:
va_getDriverName() failed with operation failed,driver_name=i965
) = 78
but as root I get:
ioctl(3, 0xc0406400, 0x10656c0) = 0
ioctl(3, 0xc0406400, 0x10656c0) = 0
ioctl(3, 0x80046402, 0x7fff4a5b24b0) = 0
ioctl(3, 0xc0286405, 0x7fff4a5b2410) = 0
write(2, "libva info: va_getDriverName() r"..., 41libva info:
va_getDriverName() returns 0
) = 41
geteuid() = 0
getuid() = 0
write(2, "libva info: Trying to open /usr/"..., 75libva info: Trying to
open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so
) = 75
Regards,
Thomas
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