I have a Merlin U630 and get the same sort of thing about shared
interrupts on Gutsy (2.6.22)

To get the card to work on my Laptop (HP dv1448ea) (915 chipset) I have
to exclude the serial port ranges that the PCMCIA modem wants to use:

/etc/pcmcia/config.opts:

exclude port 0x2f8-0x2ff
exclude port 0x3f8-0x3ff

I still get the warnings from pcmcia but the the card works:

[   16.812000] pcmcia: request for exclusive IRQ could not be fulfilled.
[   16.812000] pcmcia: the driver needs updating to supported shared IRQ lines.
[   16.856000] 0.0: ttyS2 at I/O 0x3e8 (irq = 3) is a 16550A
[   16.856000] pcmcia: request for exclusive IRQ could not be fulfilled.
[   16.856000] pcmcia: the driver needs updating to supported shared IRQ lines.
[   16.896000] 0.1: ttyS3 at I/O 0x2e8 (irq = 3) is a 16550A

Interestingly, on Windows XP there is a 'patch' that you have to install
to make the card work that I expect does the same thing.  Therefore, I
think there is a hardware problem (i.e. a bug in the HP laptop hardware)
with the PCI bridge to the PCMCIA slot which is preventing the serial
ports on ISA 0x2f8, etc. from reaching the CPU and therefore, the PCMCIA
code falls back to the other ports as specified by the CIS on the U630
card.  Hope this helps somebody.

Cheers
Alex.

-- 
PCMCIA modem gives IRQ error
https://bugs.launchpad.net/bugs/79398
You received this bug notification because you are a member of Ubuntu
Bugs, which is the bug contact for Ubuntu.

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

Reply via email to