On Wed, Oct 28, 2009 at 10:10 PM, Bob Cunningham <rcunn...@acm.org> wrote: > I just completed a fresh install of MythTV 0.22 RC1 on my fully-updated > Fedora 11 system. My tuner is an HVR-950Q, connected to cable. The tuner > works fine under tvtime (SD) and xine (HD). > > All MythTV functions work, except LiveTV. The problem is that mythfrontend > times out waiting for the HVR-950Q to tune to the first station. This > appears to be due to the very long HVR-950Q firmware load time, since no > errors are reported by the backend. > > Unfortunately, mythfrontend has a hard-wired 7 second timeout for most > requests sent to the backend. It seems this timeout works fine under normal > circumstances for every other tuner MythTV works with. > > The following is repeated in dmesg after every attempt: > > xc5000: waiting for firmware upload (dvb-fe-xc5000-1.6.114.fw)... > usb 1-2: firmware: requesting dvb-fe-xc5000-1.6.114.fw > xc5000: firmware read 12401 bytes. > xc5000: firmware uploading... > xc5000: firmware upload complete... > > It looks like the HVR-950Q driver reloads the firmware at every possible > opportunity, independent of the hardware state, each time either the SD or > HD device is opened, such as when changing from an SD channel on /dev/video0 > to an HD channel on /dev/dvb/adapter0. Is this necessary? > > Is it possible to tell the driver to ease up on the firmware reloads? I > don't mind if the first attempt fails, but the second attempt should succeed > (without a reload). > > Alternatively, are faster firmware loads possible? > > Should I open a bug on this?
Hello Bob, In order to avoid the firmware reloading condition, you need to add a modprobe option called "no_poweroff=1" for the xc5000 driver to your modprobe.conf file and then reboot your computer. I agree that this is a very annoying workaround, but have not had a chance to try to find another solution (the i2c master in the au0828 hardware is poorly designed and this same problem occurs in Windows but the problem is not as noticeable because the Windows application doesn't as aggressively power down the tuner). Also, in order for the video to be rendered properly, you need to make sure your capture resolution for LiveTV mode and the various capture modes is set to 720x480 (the default in MythTV is 480x480). Without this change, the picture will appear to be vertically stretched. This is actually a bug in MythTV not properly handling analog capture products that do not have an onboard hardware scaler (I did work in 0.22 to get the analog support working but have not had an opportunity to fix this bug yet). If you still have trouble, feel free to reply to this message. Cheers, Devin -- Devin J. Heitmueller - Kernel Labs http://www.kernellabs.com -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
