On Fri, Aug 29, 2014 at 3:10 AM, David Henningsson
<david.henningsson@xxxxxxxxxxxxx> wrote:
> Under a 3.16 based kernel (Ubuntu 3.16.0-031600-lowlatency),
> CardBus is not working unless pci=assign-buses is added to the
> kernel boot parameters.
>
> Signed-off-by: David Henningsson <david.henningsson@xxxxxxxxxxxxx>
> ---
> arch/x86/pci/common.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> It was working OOTB on a 3.2 based kernel (Ubuntu 3.2.0-67-generic),
> and I have not thoroughly bisected what made it stop working.
> Still I'm suggesting to just a quirk to make it work regardless of
> kernel - it's a ~8 year old laptop, so being a bit lazy about it is
> probably okay, I hope. :-)
Please open a bugzilla and attach complete "lspci -vv" output and
dmesg logs from the working 3.2 kernel and a non-working current
kernel.
The quirk might be OK, but it would be better if we could make a
generic fix that would work on more machines than just this one.
>
> Extract from dmidecode:
>
> Handle 0x0100, DMI type 1, 25 bytes
> System Information
> Manufacturer: Dell Inc.
> Product Name: Latitude D505
>
> diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
> index 059a76c..1849e39 100644
> --- a/arch/x86/pci/common.c
> +++ b/arch/x86/pci/common.c
> @@ -262,6 +262,14 @@ static const struct dmi_system_id pciprobe_dmi_table[] = {
> DMI_MATCH(DMI_PRODUCT_NAME, "SX20S"),
> },
> },
> + {
> + .callback = assign_all_busses,
> + .ident = "Dell Latitude D505 Laptop",
> + .matches = {
> + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
> + DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D505"),
> + },
> + },
> #endif /* __i386__ */
> {
> .callback = set_bf_sort,
> --
> 1.9.1
>
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