Steven Stern wrote: > Mikkel L. Ellertson wrote: >> Steven Stern wrote: >>> After upgrading from FC6 to F7, I see the following as I boot >>> >>> Jul 3 22:04:43 sds-desk kernel: serial8250: too much work for irq17 >>> Jul 3 22:04:43 sds-desk kernel: serial8250: too much work for irq17 >>> >>> Is this serious? >> It is definitely strange. Where did you get a card using a 8250 UART >> that is using IRQ 17? I didn't think anybody used them any more, as >> they are a UART without a transmit/receive buffer. Considering that >> it would be generating an interrupt for each character, you would >> not want it on a high IRQ. On the other hand, the device is probably >> not reporting itself correctly. If it does have a 8250 UART on it, >> see if you can change the IRQ to 3 or 4. > >> Mikkel > > > Here's some possible hardware (from /etc/sysconfig/hwconf) > > class: OTHER > bus: PCI > detached: 0 > desc: "Intel Corporation FA82537EP 56K V.92 Data/Fax Modem PCI" > vendorId: 8086 > deviceId: 1080 > subVendorId: 1028 > subDeviceId: 1000 > pciType: 1 > pcidom: 0 > pcibus: 4 > pcidev: 1 > pcifn: 0 > Yes, that is probably the problem hardware. For some reason, some modems will report that they are a 8250 UART, but they behave more like at 16550, with both send and receive FIFO buffers. They may or may not support the 16550 registers for controlling them. I don't remember all the details any more - I have not had to deal with them for a long time. Mikkel -- Do not meddle in the affairs of dragons, for thou art crunchy and taste good with Ketchup!
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