I get following errors in dmesg and while booting up: Output of dmesg | grep wm8775
[code] kmarien@kmarien-toshiba:~$ dmesg | grep wm8775 [ 24.307633] wm8775 0-001b: chip found @ 0x36 (ivtv i2c driver #0) [ 24.310811] wm8775 0-001b: I2C: cannot write 000 to register R23 [ 24.314233] wm8775 0-001b: I2C: cannot write 000 to register R7 [ 24.320141] wm8775 0-001b: I2C: cannot write 021 to register R11 [ 24.329971] wm8775 0-001b: I2C: cannot write 102 to register R12 [ 24.336580] wm8775 0-001b: I2C: cannot write 000 to register R13 [ 24.347176] wm8775 0-001b: I2C: cannot write 1d4 to register R14 [ 24.359695] wm8775 0-001b: I2C: cannot write 1d4 to register R15 [ 24.366302] wm8775 0-001b: I2C: cannot write 1bf to register R16 [ 24.382539] wm8775 0-001b: I2C: cannot write 185 to register R17 [ 24.405812] wm8775 0-001b: I2C: cannot write 0a2 to register R18 [ 24.417091] wm8775 0-001b: I2C: cannot write 005 to register R19 [ 24.422122] wm8775 0-001b: I2C: cannot write 07a to register R20 [ 24.430521] wm8775 0-001b: I2C: cannot write 102 to register R21 [ 25.493143] wm8775 0-001b: I2C: cannot write 0c0 to register R21 [ 25.496378] wm8775 0-001b: I2C: cannot write 1d4 to register R14 [ 25.499450] wm8775 0-001b: I2C: cannot write 1d4 to register R15 [ 25.502637] wm8775 0-001b: I2C: cannot write 102 to register R21 [ 25.551420] wm8775 0-001b: I2C: cannot write 0c0 to register R21 [ 25.555371] wm8775 0-001b: I2C: cannot write 1d4 to register R14 [ 25.560391] wm8775 0-001b: I2C: cannot write 1d4 to register R15 [ 25.566390] wm8775 0-001b: I2C: cannot write 102 to register R21 [ 25.636146] wm8775 0-001b: I2C: cannot write 0c0 to register R21 [ 25.643987] wm8775 0-001b: I2C: cannot write 1d4 to register R14 [ 25.651090] wm8775 0-001b: I2C: cannot write 1d4 to register R15 [ 25.659464] wm8775 0-001b: I2C: cannot write 108 to register R21 [ 25.785546] wm8775 0-001b: I2C: cannot write 0c0 to register R21 [ 25.789610] wm8775 0-001b: I2C: cannot write 1d4 to register R14 [ 25.794891] wm8775 0-001b: I2C: cannot write 1d4 to register R15 [ 25.802045] wm8775 0-001b: I2C: cannot write 102 to register R21 [ 35.159865] wm8775 0-001b: I2C: cannot write 0c0 to register R21 [ 35.190218] wm8775 0-001b: I2C: cannot write 1d4 to register R14 [ 35.221921] wm8775 0-001b: I2C: cannot write 1d4 to register R15 [ 35.272557] wm8775 0-001b: I2C: cannot write 108 to register R21 [ 35.770748] wm8775 0-001b: I2C: cannot write 0c0 to register R21 [ 35.796549] wm8775 0-001b: I2C: cannot write 1d4 to register R14 [ 35.836380] wm8775 0-001b: I2C: cannot write 1d4 to register R15 [ 35.882487] wm8775 0-001b: I2C: cannot write 102 to register R21 [\code] and this is the output of dmseg | grep ivtv [code] kmarien@kmarien-toshiba:~$ dmesg | grep ivtv [ 23.807427] ivtv: Start initialization, version 1.4.1 [ 24.208236] ivtv0: Initializing card 0 [ 24.208245] ivtv0: Unknown card: vendor/device: [4444:0016] [ 24.208518] ivtv0: subsystem vendor/device: [1179:0001] [ 24.208815] ivtv0: cx23416 based [ 24.209044] ivtv0: Defaulting to Hauppauge WinTV PVR-150 card [ 24.209316] ivtv0: Please mail the vendor/device and subsystem vendor/device IDs and what kind of [ 24.209720] ivtv0: card you have to the ivtv-devel mailinglist (www.ivtvdriver.org) [ 24.210083] ivtv0: Prefix your subject line with [UNKNOWN IVTV CARD]. [ 24.216077] ivtv 0000:02:09.0: PCI INT A -> Link[LNKD] -> GSI 11 (level, low) -> IRQ 11 [ 24.228741] ivtv0: Invalid EEPROM [ 24.261511] cx25840 0-0044: cx25 0-21 found @ 0x88 (ivtv i2c driver #0) [ 24.304261] tuner 0-0060: chip found @ 0xc0 (ivtv i2c driver #0) [ 24.307633] wm8775 0-001b: chip found @ 0x36 (ivtv i2c driver #0) [ 24.430822] IRQ 11/ivtv0: IRQF_DISABLED is not guaranteed on shared IRQs [ 24.431358] ivtv0: Registered device video0 for encoder MPG (4096 kB) [ 24.432079] ivtv0: Registered device video32 for encoder YUV (2048 kB) [ 24.432179] ivtv0: Registered device vbi0 for encoder VBI (1024 kB) [ 24.432277] ivtv0: Registered device video24 for encoder PCM (320 kB) [ 24.432380] ivtv0: Registered device radio0 for encoder radio [ 24.432383] ivtv0: Initialized card: Hauppauge WinTV PVR-150 [ 24.433172] ivtv: End initialization [ 25.065014] ivtv 0000:02:09.0: firmware: requesting v4l-cx2341x-enc.fw [ 25.076449] ivtv0: Loaded v4l-cx2341x-enc.fw firmware (376836 bytes) [ 25.296156] ivtv0: Encoder revision: 0x02060039 [\code] This is the output of lspci [code] kmarien@kmarien-toshiba:~$ lspci 00:00.0 Host bridge: Intel Corporation 82855PM Processor to I/O Controller (rev 21) 00:01.0 PCI bridge: Intel Corporation 82855PM Processor to AGP Controller (rev 21) 00:1d.0 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #1 (rev 03) 00:1d.1 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #2 (rev 03) 00:1d.2 USB Controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #3 (rev 03) 00:1d.7 USB Controller: Intel Corporation 82801DB/DBM (ICH4/ICH4-M) USB2 EHCI Controller (rev 03) 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 83) 00:1f.0 ISA bridge: Intel Corporation 82801DBM (ICH4-M) LPC Interface Bridge (rev 03) 00:1f.1 IDE interface: Intel Corporation 82801DBM (ICH4-M) IDE Controller (rev 03) 00:1f.5 Multimedia audio controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 03) 00:1f.6 Modem: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Modem Controller (rev 03) 01:00.0 VGA compatible controller: nVidia Corporation NV36 [GeForce FX Go5700] (rev a1) 02:05.0 Network controller: Intel Corporation PRO/Wireless 2200BG [Calexico2] Network Connection (rev 05) 02:08.0 Ethernet controller: Intel Corporation 82801DB PRO/100 VE (MOB) Ethernet Controller (rev 83) 02:09.0 Multimedia video controller: Internext Compression Inc iTVC16 (CX23416) MPEG-2 Encoder (rev 01) 02:0b.0 CardBus bridge: Texas Instruments PCIxx21/x515 Cardbus Controller 02:0b.2 FireWire (IEEE 1394): Texas Instruments OHCI Compliant IEEE 1394 Host Controller 02:0b.3 Mass storage controller: Texas Instruments PCIxx21 Integrated FlashMedia Controller 02:0b.4 SD Host controller: Texas Instruments PCI6411/6421/6611/6621/7411/7421/7611/7621 Secure Digital Controller [\code] I installed the drivers for this tuner from ivtv download page. I do not have a remote control connected (maybe this is the reason for the I2C errors, I really don't know) Is this problem known and is there a fix or workaround?
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