[mythtv-users] Jumpy live tv
magnus at vista.se
Wed Sep 24 20:01:03 UTC 2008
I have tried installing the fglrx manually as well, according to
However, this does not solve the issue - the TV image is even more
shaky, and fglrxinfo gives error msgs (unable to open display, no
When reverting to the ubuntu version of fglrx, installed via gnomes
restricted driver manager, fglrxinfo gives good output, showin an ATI
device, but the same Xv error appears in the mythtv-log, and the image
is still very jumpy.
Are there any other versions of the driver I can try? Or things to
check? Or just buy another card....?
Nick Morrott skrev:
> On 23/09/2008, Magnus Larsson <magnus at vista.se> wrote:
>> Hello all!
>> I have a newly installed mythfrontend on a htpc, running mythbuntu 8.04.
>> I have a problem with live TV that is jumpy. I did have an earlier
>> installation on this same machine, where live TV worked fine - for other
>> reasons I reinstalled and arrived at my previous state.
>> TV profile is now set to Slim. The frontend is connected to a backend
>> over the LAN, with ethernet cable, that gives around 90 MBits/s
>> according to iperf. The machine runs with an ATI graphics card, where I
>> use fglrx driver, installed through ubuntu. The screen is a 42 inch
>> plasma TV, connected via DVI-HDMI, at 1080p.
>> To add to the confusion, it seems to sometimes jumpy to another screen
>> resolution during tv playback, so the image is drawn out vertically -
>> and this affects the whole x session so that when I close mythtv, the
>> desktop is drawn out. However, this might be a more spurious and not
>> related issue....
>> Output from /var/log/mythtv/mythfrontend.og below. Anyone got any ideas
>> on what to check or try (apart from "another graphics card" ...)?
> Looks like both your audio and video configuration are broken:
>> 2008-09-23 20:33:12.706 Opening ALSA audio device 'default'.
>> ALSA lib control.c:909:(snd_ctl_open_noupdate) Invalid CTL /dev/mixer
>> 2008-09-23 20:33:12.761 AudioOutput Warning: Mixer attach error -2: No
>> such file or directory
>> Check Mixer Name in Setup: '/dev/mixer'
>> 2008-09-23 20:33:12.939 VideoOutputXv Error: Could not find suitable
>> XVideo surface.
>> 2008-09-23 20:33:12.939 VideoOutputXv: Falling back to X11 video output
>> over a network socket.
>> *** May be very slow ***
>> 2008-09-23 20:33:12.994 VideoOutputXv Error: XCreateImage failed:
> If using ALSA in MythTV, "ALSA:default" is the mixer to use.
> Your ATI video driver does not seem to be installed correctly, or at
> least the Xv acceleration is not. MythTV cannot use the acceleration
> during playback, so you see the jumpy TV picture.
> # xvinfo
> should report that Xv is working properly. If you don't have a brand
> new ATI card, can you try a removal/reinstallation of the fglrx
> driver, or try the FOSS radeon/ati driver instead?
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