On Sun, Jun 21, 2009 at 5:44 PM, Laszlo Kustan<lkus...@gmail.com> wrote: > Hi everyone, > I have a Kword DVB-T 323UR connected to a Linux Mint 7 Gloria (based > on Ubuntu Jaunty), kernel 2.6.28. > I successfully compiled em28xx, the firmware was obtained based on these > steps: > 1) Download the windows driver with something like: > wget > http://www.steventoth.net/linux/xc5000/HVR-12x0-14x0-17x0_1_25_25271_WHQL.zip > 2) Extract the file hcw85bda.sys from the zip into the current dir: > unzip -j HVR-12x0-14x0-17x0_1_25_25271_WHQL.zip Driver85/hcw85bda.sys > 3) run the script: > ./extract_xc3028.pl > 4) copy the generated file: > cp xc3028-v27.fw /lib/firmware > > My windows driver is called embda.sys, so I'm not sure whether the > firmware is 100% good for my tuner or not. > I have a couple of problems: > 1. no analog audio, but I found out this works with workarounds > > I tried several tricks: > a. sox -c 2 -r 32000 -t ossdsp /dev/dsp1 -t ossdsp /dev/dsp > this works, but with a 4-5 second delay between audio and video > > b. arecord -D hw:1,0 -r 32000 -c 2 -f S16_LE | play -q -c 2 -r 32000 -t wav - > & > I get an error: > l...@laco-desktop ~ $ arecord -D hw:1,0 -r 32000 -c 2 -f S16_LE | play > -q -c 2 -r 32000 -t wav - & > [1] 9084 > l...@laco-desktop ~ $ Recording WAVE 'stdin' : Signed 16 bit Little > Endian, Rate 32000 Hz, Stereo > Warning: rate is not accurate (requested = 32000Hz, got = 48000Hz) > please, try the plug plugin > arecord: pcm_read:1529: read error: Input/output error > play wav: Premature EOF on .wav input file > > c. install modified tvtime from mcentral.de > I get an error in this case too: > Reading configuration from /usr/etc/tvtime/tvtime.xml > Reading configuration from /home/laco/.tvtime/tvtime.xml > HDA NVidia : AD198x Analog hw:0,0 > Em28xx Audio : Empia 28xx Capture hw:1,0 > opening: hw:1,0 > Access type not available > > My arecord -l output is: > l...@laco-desktop ~ $ arecord -l > **** List of CAPTURE Hardware Devices **** > card 0: NVidia [HDA NVidia], device 0: AD198x Analog [AD198x Analog] > Subdevices: 1/1 > Subdevice #0: subdevice #0 > card 1: Em28xx Audio [Em28xx Audio], device 0: Em28xx Audio [Empia 28xx > Capture] > Subdevices: 1/1 > Subdevice #0: subdevice #0 > > 2. my remote is not recognized. Here is the em28xx part from dmesg: > l...@laco-desktop ~ $ dmesg | grep em28xx > [11231.562817] em28xx v4l2 driver version 0.0.1 loaded > [11231.564913] em28xx: new video device (eb1a:e323): interface 0, class 255 > [11231.564920] em28xx: setting up device on a USB 1.1 bus > [11231.564924] em28xx: your device won't work properly when > [11231.564927] em28xx: not attached to a USB 2.0 highspeed bus > [11231.564931] em28xx: more information: > [11231.564933] em28xx: http://mcentral.de/wiki/index.php5/Talk:Em2880 > [11231.564942] em28xx #0: Alternate settings: 8 > [11231.564946] em28xx #0: Alternate setting 0, max size= 0 > [11231.564950] em28xx #0: Alternate setting 1, max size= 512 > [11231.564954] em28xx #0: Alternate setting 2, max size= 640 > [11231.564958] em28xx #0: Alternate setting 3, max size= 768 > [11231.564962] em28xx #0: Alternate setting 4, max size= 832 > [11231.564966] em28xx #0: Alternate setting 5, max size= 896 > [11231.564969] em28xx #0: Alternate setting 6, max size= 960 > [11231.564973] em28xx #0: Alternate setting 7, max size= 1020 > [11240.939178] em28xx #0: V4L2 VBI device registered as /dev/vbi0 > [11240.998075] em28xx #0: V4L2 device registered as /dev/video0 > [11240.998087] em28xx #0: Found KWorld E323 > [11240.998153] usbcore: registered new interface driver em28xx > [11241.064491] em28xx-audio.c: probing for em28x1 non standard usbaudio > [11241.064497] em28xx-audio.c: Copyright (C) 2006 Markus Rechberger > [11241.922736] em28xx-audio: device is currently in analog TV mode > > Nothing about input devices here and neither in /proc/bus/input/devices. > > 3. heat problems > I noticed that when it is connected, it gets quite hot, even if no dvb > software is running. In Windows it does not get so hot, even when > watching tv. > > Sorry for this long mail. > The first point would be the most important to solve, if you need more > details to help me, no problem. > Thanks, Laszlo
Hello Laszlo, Please send correspondence to the linux-media mailing list, as the linux-dvb list is deprecated. Your firmware is fine. The extract_xc3027.pl script will *only* work if the md5 checksum matches, so if it matched then you ended up with the correct firmware. Regarding #1, the audio is working correctly. The problem is that for raw capture devices there is no way currently for the v4l2 to inform applications where to find the ALSA device that provides the audio. Your card is behaving consistently with *every* other product currently supported that provides a raw video stream (as opposed to products with an MPEG encoder onboard). The reason you see the audio being out of sync with the video is because of buffering of the audio prior to playback. You can usually control this behavior with command line arguments for arecord or sox. Regarding #2, if your remote does not work, then the driver probably does not have a remote control profile defined for your product. I really should write some sort of script to make it easier to define these. If that is something you want to work with me on, email me off-list and I will go through the steps with you to get a profile into the kernel for your remote. Regarding #3, it is true that all of these devices run hot by design. I've done considerable analysis into the issue, and it turns up that the devices run at the exact same temperature under Windows as they do under Linux when capturing. However, the Linux driver does not properly shut down the tuner when not in use, which effectively means the device is running at that temperature all the time. This causes people to believe the device runs hotter under Linux, when in fact they are just noticing that the device is always running hot. Mauro did some work in this area to improve the driver, and I really should follow through and complete that work. Again, this behavior occurs with almost all em28xx devices that use xc3028. 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
