On Thu, Apr 19, 2012 at 4:16 PM, Martin Mokrejs <mmokrejs@xxxxxxxxxxxxxxxxxx> wrote: > > > Yinghai Lu wrote: >> On Wed, Apr 18, 2012 at 1:29 PM, Martin Mokrejs >> <mmokrejs@xxxxxxxxxxxxxxxxxx> wrote: >>> Yinghai Lu wrote: >>>> On Wed, Apr 18, 2012 at 10:53 AM, Martin Mokrejs >>>> <mmokrejs@xxxxxxxxxxxxxxxxxx> wrote: >>>>>> After you remove USB3 expresscard, you need to >>>>>> >>>>>> echo 1 > /sys/devices/pci0000\:00/0000\:00\:1c.7/pcie_link_disable >>>>>> then >>>>>> echo 0 > /sys/devices/pci0000\:00/0000\:00\:1c.7/pcie_link_disable >>>>> >> >> sometimes it report correctly. sometime it does not. > > I realized with Win 7 that if the Express Card with the two USB 3.0 ports has an external drive > connected, its removal gets "always" detected. Probably because USB is polling for the disk and > realizes that is is gone? > > Second observation is that in Device manager if I open the USB controllers list, I see for > this card a USB HUB and a USB controller (two lines in the listig). If I remove the card > the listing doesn't get updated. When I open the ROOT HUB properties, on the General tab > is claimed that it is working well and the system does not realize the card is unplugged > a long while already. But, if I open properties of the HOST CONTROLLER, it I think updates > the "General tab" and says something about code 45. And after closing tgis HOST CONTROLLER > window, the Device manager windows gets refreshed and the two lines related to the card > disappear. ok, other OS have same problem. > > > > I just tried something similar under linux, with all the patches I accumulated for 3.4-rc3 > and posted in my previous emails. It seems linux flips some value so on every second card > removal it really does realize it was just unplugged. ... that is really looks like silicon problem. > Maybe the above is helpful? > Martin > P.S.: Meanwhile am waiting for an answer from Dell. thinkpad 420 only can use acpiphp, because bios does give PCI CAP control to OS via _OSC, pciehp could not used. Yinghai -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
