After many trials, I observe that the image quality is recovered when no other 
USB2.0 devices are connected to the GA-MA78GM mother board (WIFI dongle or Hard 
Drive). This problems seems to be releated to this bug 
http://bugzilla.kernel.org/show_bug.cgi?id=11599 and/or that one 
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/256492.

But it seems that the ehcd-hci bug is solved (but not for me!)

Any idea?
Julien
 

--- En date de : Sam 2.5.09, julien de ROSNY <m8...@yahoo.fr> a écrit :

> De: julien de ROSNY <m8...@yahoo.fr>
> Objet: [linux-dvb] dibcom3000 (dvb) driver bug with ubuntu 9.04 (2.6.28 
> kernel)?
> À: linux-...@linuxtv.org
> Date: Samedi 2 Mai 2009, 0h07
> 
> 
> Hello,
> 
> Since a couple of years, I use a WinFast DTV Dongle
> (dib3000mc) on a ASUS (intel) laptop without any trouble. It
> works with ubuntu 8.04. The quality is perfect
> 
> I use now the same dongle on a recent laptop PC based on a
> GA-MA78GM-US2H mother board and the quality of the image is
> very bad and the soft (me-tv) rebuffer very often. It is
> unlikely a probleme of signal strength, because on the same
> antenna plug, the dvb works very well with the laptop, and
> very bad with the desktop computer. See below some
> informations about the dvb with the two configrations :
> laptop and the desktop computer.
> 
> I noticed that there are some differences between the
> loaded modules. i2c_core and usbcore are abscent with ubuntu
> 9.04. Is it normal? Morever if you carefully look at the
> dvbtraffic, it is lower for the LAPTOP for a same program.
> This is very repetive behaviour. It is not normal.
> 
> Does anyone have an idea of whats wrong with the LAPTOP
> configuration. 
> 
> Thanks.
> 
> Julien R.
> 
> 
> ***********************************************
> LAPTOP (GOOD image quality)
> 
> uname -a :
> Linux portable 2.6.24-23-generic #1 SMP Wed Apr 1 21:47:28
> UTC 2009 i686 GNU/Linux
> 
> lsusb:
> Bus 005 Device 011: ID 0413:6026 Leadtek Research, Inc.
> WinFast DTV Dongle (warm state)
> 
> 
> lsmod | grep dvb
> dvb_usb_dibusb_mc       6400 
> 0
> dvb_usb_dibusb_common    10756  1
> dvb_usb_dibusb_mc
> dib3000mc             
> 13960  2 dvb_usb_dibusb_common
> dvb_usb             
>   19852  2
> dvb_usb_dibusb_mc,dvb_usb_dibusb_common
> dvb_core           
>    81404  1 dvb_usb
> i2c_core           
>    24832  4
> mt2060,dib3000mc,dibx000_common,dvb_usb
> usbcore           
>    146412  5
> dvb_usb_dibusb_mc,dvb_usb,ehci_hcd,uhci_hcd
> 
> tzap "ARTE"
> status 1f | signal c058 | snr 0000 | ber 00000000 | unc
> 00000000 | FE_HAS_LOCK
> 
> dvbtraffic
> 0000     9 p/s 
>    1 kb/s    14 kbit
> 0010     5 p/s 
>    0 kb/s     8 kbit
> 0011     0 p/s 
>    0 kb/s     1 kbit
> 0012    12 p/s     2
> kb/s    19 kbit
> 0015     1 p/s 
>    0 kb/s     2 kbit
> 006e     9 p/s 
>    1 kb/s    14 kbit
> 0078  1697 p/s   311 kb/s  2553
> kbit
> 0082   132 p/s    24
> kb/s   198 kbit
> 008c    32 p/s     5
> kb/s    49 kbit
> 00d2     9 p/s 
>    1 kb/s    14 kbit
> 00dc  2189 p/s   401 kb/s  3292
> kbit
> 00e6   132 p/s    24
> kb/s   198 kbit
> 00f0     3 p/s 
>    0 kb/s     5 kbit
> 0136     9 p/s 
>    1 kb/s    14 kbit
> 0140  1527 p/s   280 kb/s  2296
> kbit
> 014a   131 p/s    24
> kb/s   197 kbit
> 0154     1 p/s 
>    0 kb/s     2 kbit
> 01fe     9 p/s 
>    1 kb/s    14 kbit
> 0208  2104 p/s   386 kb/s  3164
> kbit
> 0212   131 p/s    24
> kb/s   197 kbit
> 0213   132 p/s    24
> kb/s   198 kbit
> 021c     1 p/s 
>    0 kb/s     2 kbit
> 021d     2 p/s 
>    0 kb/s     4 kbit
> 021e     2 p/s 
>    0 kb/s     4 kbit
> 0262     9 p/s 
>    1 kb/s    14 kbit
> 026c  1688 p/s   309 kb/s  2539
> kbit
> 0276   132 p/s    24
> kb/s   198 kbit
> 0280     2 p/s 
>    0 kb/s     4 kbit
> 0294    13 p/s     2
> kb/s    20 kbit
> 02c6     9 p/s 
>    1 kb/s    14 kbit
> 02d0  5437 p/s   998 kb/s  8178
> kbit
> 02da   131 p/s    24
> kb/s   197 kbit
> 03f2     9 p/s 
>    1 kb/s    14 kbit
> 1fff   823 p/s   151
> kb/s  1239 kbit
> 2000 16557 p/s  3039 kb/s 24901 kbit
> 
> ************************************************
> DESKTOP (very bad image)
> 
> system ubuntu jaunty
> Linux xxx 2.6.28-11-generic #42-Ubuntu SMP Fri Apr 17
> 01:57:59 
> UTC 2009 i686 GNU/Linux
> AMD 
> Mother board GA-MA78GM-US2H (USB controler : amd sb700)
> 
> lsusb 
> Bus 001 Device 006: ID 0413:6026 Leadtek Research, Inc.
> WinFast DTV Dongle (warm state)
> 
> lsmod |grep dvb
> dvb_usb_dibusb_mc      13056  0 
> dvb_usb_dibusb_common    16772  1
> dvb_usb_dibusb_mc
> dib3000mc             
> 20488  2 dvb_usb_dibusb_common
> dvb_usb             
>   24332  2
> dvb_usb_dibusb_mc,dvb_usb_dibusb_common
> dvb_core           
>    92032  1 dvb_usb
> 
> 
> tzap "ARTE"
> tuning to 586167000 Hz
> video pid 0x0208, audio pid 0x0212
> status 1f | signal cbfc | snr 0000 | ber 001fffff | unc
> 00000013 | FE_HAS_LOCK
> ...
> 
> dvbtraffic
> 0000     9 p/s 
>    1 kb/s    14 kbit
> 0012    10 p/s     1
> kb/s    16 kbit
> 0015     1 p/s 
>    0 kb/s     2 kbit
> 006e     9 p/s 
>    1 kb/s    14 kbit
> 0078  1757 p/s   322 kb/s  2643
> kbit
> 0082   127 p/s    23
> kb/s   191 kbit
> 008c     3 p/s 
>    0 kb/s     5 kbit
> 00d2     9 p/s 
>    1 kb/s    14 kbit
> 00dc  1380 p/s   253 kb/s  2076
> kbit
> 00e6   124 p/s    22
> kb/s   187 kbit
> 00f0    42 p/s     7
> kb/s    63 kbit
> 0136     9 p/s 
>    1 kb/s    14 kbit
> 0140  2912 p/s   534 kb/s  4380
> kbit
> 014a   124 p/s    22
> kb/s   187 kbit
> 0154    13 p/s     2
> kb/s    20 kbit
> 01fe     9 p/s 
>    1 kb/s    14 kbit
> 0208  2641 p/s   484 kb/s  3973
> kbit
> 0212   124 p/s    22
> kb/s   187 kbit
> 0213   127 p/s    23
> kb/s   191 kbit
> 021c     1 p/s 
>    0 kb/s     2 kbit
> 021d     1 p/s 
>    0 kb/s     2 kbit
> 021e     1 p/s 
>    0 kb/s     2 kbit
> 0262     9 p/s 
>    1 kb/s    14 kbit
> 026c  1509 p/s   277 kb/s  2270
> kbit
> 0276   125 p/s    22
> kb/s   188 kbit
> 0280     3 p/s 
>    0 kb/s     5 kbit
> 0294    12 p/s     2
> kb/s    19 kbit
> 02c6     9 p/s 
>    1 kb/s    14 kbit
> 02d0  3913 p/s   718 kb/s  5886
> kbit
> 02da   125 p/s    22
> kb/s   188 kbit
> 03f2     9 p/s 
>    1 kb/s    14 kbit
> 1fff   780 p/s   143
> kb/s  1173 kbit
> 2000 15952 p/s  2928 kb/s 23992 kbit
> -PID--FREQ-----BANDWIDTH-BANDWIDTH-
> 
> 
> 
>       
> 
> _______________________________________________
> linux-dvb users mailing list
> For V4L/DVB development, please use instead linux-media@vger.kernel.org
> linux-...@linuxtv.org
> http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
> 


      
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