Re: /sys/module/pcie_aspm/parameters/policy not writable?

From: Pavel Machek
Date: Thu Aug 01 2013 - 21:03:15 EST


> >> > But since the problem also occurs with Windows, it's pretty likely
> >> > that there's a BIOS update to fix it. I notice on the X60 support
> >> > page that there are several versions newer than what you're running.
> >>
> >> Do you have any interest in trying a newer BIOS to see if it's fixed
> >> there? If not, I understand; BIOS updates are a hassle at best.
> >> You're running BIOS 2.14, and it looks like the current BIOS for an
> >> X60 1709 7HU is 2.19 (from
> >
> > I'm lost at the lenovo pages :-(. And frankly I'd prefer not to touch
> > the BIOS.
> I tried to provide a complete link, but the web site isn't amenable to
> that. I found it by selecting the "Drivers & Software" section,
> entering "X60" as the machine type, selecting "ThinkPad X60 (1709)"
> and going to the "BIOS" section. I was surprised how easy it was :)

Ok, got it, the web pages are horible.

> >> Carolyn's patch will likely work, at least most of the time, but I
> >> think there's a small possibility that it could cause a conflict
> >> between the BIOS and the OS over ASPM control, so I'm not 100% in
> >> support of that approach. A conflict may not happen on your
> >> machine,
> >
> > Can we base it on DMI whitelist?
> I don't think we can know a priori whether a machine (even your
> machine) is susceptible to a conflict. But if Carolyn forcibly
> disables it in the driver, she can structure that with a whitelist or
> whatever she thinks is best.

Well, there's only one way to find out: try it. I was running with the
"enable ASPM so we can disable it" one-liner for a while, and seen no
ill effects.

Anyway, if you don't hear from me again, it means that I have a brick
(and not a notebook) and am desperately trying to get replacement
X60. Will try to flash it in few minutes.
(cesky, pictures)
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at