Hi,
I've already sent a similar post to the linux-acpi list some time ago, but
since I didn't get a response yet maybe this is the more appropriate place to
post. (Suggestions on where else to post are very welcome...).
Here's a summary of my problem:
After doing a s2ram cycle my Novatel Merlin U630 card won't work,
as the serial device (/dev/ttyS0 in my case) won't be initialized (don't know
the right term).
Here are some more details:
I'm running Debian/Sid on an Acer Extensa 4100 laptop (Pentium M) with a ATI
Radeon
Mobility X600 card. I'm using the fglrx driver as s2ram won't work with the
free driver (see another post, coming soon). Everything seemed fine (except
for one issue, see below) so far until I got my Novatel UMTS card.
The card is controlled by the serial_cs module. Two serial devices should be
initialized when inserting the card into the PCMCIA slot. The primary one
(/dev/ttyS0 in my case) can be used for PPP connections.
If I insert the card after a fresh boot, the card is configured correctly.
Here's an excerpt of /var/log/messages:
########
Feb 17 13:41:30 my-machine kernel: pccard: PCMCIA card inserted into slot 0
Feb 17 13:41:30 my-machine kernel: cs: memory probe 0x0c0000-0x0fffff:
excluding 0xc0000-0xcffff 0xe0000-0xfffff
Feb 17 13:41:30 my-machine kernel: cs: memory probe 0x60000000-0x61ffffff:
excluding 0x60000000-0x61ffffff
Feb 17 13:41:30 my-machine kernel: cs: memory probe 0xa0000000-0xa0ffffff:
clean.
Feb 17 13:41:30 my-machine kernel: cs: memory probe 0xc8200000-0xc82fffff:
excluding 0xc8200000-0xc821ffff
Feb 17 13:41:30 my-machine kernel: pcmcia: registering new device pcmcia0.0
Feb 17 13:41:30 my-machine kernel: pcmcia: registering new device pcmcia0.1
Feb 17 13:41:30 my-machine kernel: pcmcia: request for exclusive IRQ could not
be fulfilled.
Feb 17 13:41:30 my-machine kernel: pcmcia: the driver needs updating to
supported shared IRQ lines.
Feb 17 13:41:30 my-machine kernel: 0.0: ttyS0 at I/O 0x3f8 (irq = 10) is a
16550A
Feb 17 13:41:30 my-machine kernel: pcmcia: request for exclusive IRQ could not
be fulfilled.
Feb 17 13:41:30 my-machine kernel: pcmcia: the driver needs updating to
supported shared IRQ lines.
Feb 17 13:41:30 my-machine kernel: 0.1: ttyS3 at I/O 0x2e8 (irq = 0) is a
16550A
########
/dev/ttyS0 is the serial device pppd or e.g. minicom needs to talk to.
After a s2ram cycle, I get this on card insertion:
########
Feb 17 13:44:00 my-machine kernel: 0.1: ttyS3 at I/O 0x2e8 (irq = 0) is a
16550A
########
As you see ttyS0 isn't mentioned at all. The card isn't working.
If I do a s2disk after a fresh boot, the card is working as expected.
Moreover, if I do a s2disk after a s2ram, the card is working again.
As I've mentioned above, there has always been one issue with s2ram:
After a s2ram cycle I could not shut down the X server, as I would be left
with a blank black screen and could not swith to a console anymore. As with
the Novatel card, this problem does not occur after a s2disk and the
defective behaviour get fixed by a s2disk after s2ram.
I suspect that there's something wrong with the IRQs after s2ram: Both, the
fglrx and ttyS0 share IRQ=10. What does s2disk do with respect ot IRQs that
s2ram does not?
BTW, here's my /proc/interrupts:
#####
~$ cat /proc/interrupts
CPU0
0: 1022618 XT-PIC timer
1: 203 XT-PIC i8042
2: 0 XT-PIC cascade
8: 1 XT-PIC rtc
9: 36543 XT-PIC acpi
10: 66802 XT-PIC uhci_hcd:usb3, uhci_hcd:usb4, ohci1394,
yenta, eth0, fglrx
11: 26496 XT-PIC uhci_hcd:usb1, uhci_hcd:usb2, ehci_hcd:usb5,
ipw2200, Intel ICH6
12: 92511 XT-PIC i8042
14: 104495 XT-PIC ide0
NMI: 0
LOC: 233549
ERR: 0
MIS: 0
#####
You might notice that IRQs are not very balanced. Ah, yes, and I have to use
the noapic kernel option (it's a 2.6.18.1 kernel) for working
suspend/resume .
Any idea how to make the card work after a s2ram?
Thanks,
Felix Homann
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