I'm using a cx88 based DVB-T card. When I shut down the computer, the system is firstly shut down as usual, but when the computer actually should power down I get those error messages repeatedly instead:
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Powering down.
<4>[ 86.93B221] cx88[0]: risc3: 0xffffffff [ INVALID sol eol irq2 irq1 23 22 21 20 19 18 cnt1 cnt0 resync 14 13 12<4>[ 88.325664] cx88[0]: iq9: 0xffffffff [ INVALID sol eol irq2 irq1 23 22 21 20 19 18 cnt1 cnt0 resync 14 13 12<4>[ 88.346940] cx88[0]: iq5: 0xffffffff [ INVALID sol eol irq2 irq1 23 22 21 20 19 18 cnt1 cnt0 resync 14 13 12<7>[ 88.357366] cx88[0]: irq mpeg [0xffffffff] ts_risci1* 2* 3* ts_risci2* 5* 6* 7* ts_oflow* 9* 18* 11* ts_sync* 13* 14* 15* opc_err* par_err* rip_err* pci_abort* ts_err?* 21* 22* 23* 24* 25* 26* 27* 28* 29* 30* 31*
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rmmod cx8800
Since I never had this issue with Arch Linux nor with Gentoo, and it can be solved by this rmmod workaround, I think it's likely to be a distribution specific bug, probably either in the kernel, in /sbin/poweroff resp. /sbin/halt or in /etc/rc.d/rc.6.