Po-Hsu Lin / Anthony Wong, as per
http://www.dell.com/support/home/us/en/19/product-support/product/inspiron-15-3541-laptop/drivers
an update to your BIOS is available (A01). If you update to this following
https://help.ubuntu.com/community/BiosUpdate does it change anything? If it
doesn't, could you please both specify what happened, and provide the output of
the following terminal command:
sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date
Thank you for your understanding.
** Tags added: bios-outdated-a01
** Changed in: linux (Ubuntu)
Importance: Undecided => Low
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1345895
Title:
[Dell Inspiron 3541] USB3 stick speed drop to 480M after first use
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
CID: 201403-14859 Dell Inspiron 3541
The USB3 speed is 5000M when the first time you insert it after boot:
ubuntu@201403-14859:~$ lsusb -t
/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 5000M
|__ Port 1: Dev 2, If 0, Class=Mass Storage, Driver=usb-storage, 5000M
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
|__ Port 1: Dev 3, If 0, Class=Vendor Specific Class, Driver=rts5139,
480M
|__ Port 2: Dev 6, If 0, Class=Wireless, Driver=btusb, 12M
|__ Port 2: Dev 6, If 1, Class=Wireless, Driver=btusb, 12M
|__ Port 4: Dev 5, If 0, Class=Video, Driver=uvcvideo, 480M
|__ Port 4: Dev 5, If 1, Class=Video, Driver=uvcvideo, 480M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
But if you remove it and plug it to the same USB3 port again, it will drop to
480M:
ubuntu@201403-14859:~$ lsusb -t
/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 5000M
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M
|__ Port 1: Dev 2, If 0, Class=Mass Storage, Driver=usb-storage, 480M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
|__ Port 1: Dev 3, If 0, Class=Vendor Specific Class, Driver=rts5139,
480M
|__ Port 2: Dev 6, If 0, Class=Wireless, Driver=btusb, 12M
|__ Port 2: Dev 6, If 1, Class=Wireless, Driver=btusb, 12M
|__ Port 4: Dev 5, If 0, Class=Video, Driver=uvcvideo, 480M
|__ Port 4: Dev 5, If 1, Class=Video, Driver=uvcvideo, 480M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-24-generic 3.13.0-24.46 [modified:
boot/vmlinuz-3.13.0-24-generic]
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: ubuntu 1660 F.... pulseaudio
/dev/snd/controlC0: ubuntu 1660 F.... pulseaudio
CRDA:
country TW:
(2402 - 2472 @ 40), (3, 27)
(5270 - 5330 @ 40), (3, 17), DFS
(5735 - 5815 @ 40), (3, 30)
CurrentDesktop: Unity
Date: Thu Jul 17 02:51:28 2014
HibernationDevice: RESUME=UUID=43272c2a-1a8c-404b-8b62-9c6b53e1a765
InstallationDate: Installed on 2014-07-16 (0 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: Dell Inc. Inspiron 3541
ProcFB: 0 EFI VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed
root=UUID=4f3d06a7-1106-40c0-a15b-0657fd66a382 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.13.0-24-generic N/A
linux-backports-modules-3.13.0-24-generic N/A
linux-firmware 1.127
SourcePackage: linux
StagingDrivers: rts5139
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/20/2014
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A00
dmi.board.name: Inspiron 3541
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias:
dmi:bvnDellInc.:bvrA00:bd03/20/2014:svnDellInc.:pnInspiron3541:pvrNotSpecified:rvnDellInc.:rnInspiron3541:rvrA00:cvnDellInc.:ct8:cvrNotSpecified:
dmi.product.name: Inspiron 3541
dmi.product.version: Not Specified
dmi.sys.vendor: Dell Inc.
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