2011/10/6 dave cunningham <ml@xxxxxxxxxxxxxx>: > In message > <CAL9G6WXX2eGmoT+ozv1F0JQdSV5JPwbB0vn70UL+ghgkLGsYQg@xxxxxxxxxxxxxx>, Josu > Lazkano wrote > > <snip> >> >> I get this I2C messages: >> >> # tail -f /var/log/messages >> Oct 5 20:16:44 htpc kernel: [ 534.168957] af9013: I2C read failed >> reg:d330 >> Oct 5 20:16:49 htpc kernel: [ 538.626152] af9013: I2C read failed >> reg:d330 >> Oct 5 21:22:15 htpc kernel: [ 4464.930734] af9013: I2C write failed >> reg:d2e2 len:1 >> Oct 5 21:40:46 htpc kernel: [ 5576.241897] af9013: I2C read failed >> reg:d2e6 >> Oct 5 23:07:33 htpc kernel: [10782.852522] af9013: I2C read failed >> reg:d2e6 >> Oct 5 23:20:11 htpc kernel: [11540.824515] af9013: I2C read failed >> reg:d07c >> Oct 6 00:11:41 htpc kernel: [14631.122384] af9013: I2C read failed >> reg:d2e6 >> Oct 6 00:26:13 htpc kernel: [15502.900549] af9013: I2C read failed >> reg:d2e6 >> Oct 6 00:39:58 htpc kernel: [16328.273015] af9013: I2C read failed >> reg:d330 >> > > I have two af9013 sticks in my mythtv backend. One is a KWorld 399U, the > other a single tuner Tevion stick. > > When I originally setup this system I had major problems with these sticks > and also a pair of Freecom WT-220U (which worked perfectly in an older > system - I've since disposed of these). > > I was seeing I2C read fails similar to the above. > > The system in question has an AMD760G southbridge. > > After a lot of googling I came across a post somewhere which said that the > USB host controller on the 760G is problematic and suggested getting a NEC > or VIA hub and using this between the DVB sticks and the root hub. > > I bought a cheap hub with an NEC chip on and since then (6 months maybe) > I've had no problems with the system. Having said this I probably don't use > all three frontends that often (I also have a DVB-S card and this takes > precedence) though I certainly have on occasion and don't recall any > problems. > > -- > Dave Cunningham PGP KEY ID: 0xA78636DC > Thanks Dave, I have a MCP79 nvidia USB controller: $ lspci | grep USB 00:04.0 USB Controller: nVidia Corporation MCP79 OHCI USB 1.1 Controller (rev b1) 00:04.1 USB Controller: nVidia Corporation MCP79 EHCI USB 2.0 Controller (rev b1) 00:06.0 USB Controller: nVidia Corporation MCP79 OHCI USB 1.1 Controller (rev b1) 00:06.1 USB Controller: nVidia Corporation MCP79 EHCI USB 2.0 Controller (rev b1) When I add a USB hub it can not boot, the system stop on boot. I can not change the system board. Need I some extra configuration on BIOS? I will appreciate any help, I have no experience on system performance. Thanks for all your help. Regards. -- Josu Lazkano -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
