This problem is caused by port switching. In last discussion of this bug
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1210858 there was a
patch to fix this issue. In new kernel it looks like this
--- drivers/usb/host/pci-quirks.c 2013-12-29 01:18:08.156795361 +0400
+++ drivers/usb/host/pci-quirks.c 2013-12-30 00:24:45.778376887 +0400
@@ -909,8 +909,8 @@
writel(val, base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET);
hc_init:
- if (pdev->vendor == PCI_VENDOR_ID_INTEL)
- usb_enable_intel_xhci_ports(pdev);
+ /*if (pdev->vendor == PCI_VENDOR_ID_INTEL)
+ usb_enable_intel_xhci_ports(pdev);*/
op_reg_base = base + XHCI_HC_LENGTH(readl(base));
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https://bugs.launchpad.net/bugs/1316897
Title:
[Sony VAIO SVT13136CXS] usb2 port does not work.
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