Thread: Poor WLAN Performance on DELL XPS 14.

hello everybody,
since few weeks have got new dell xps 14. (http://www.dell.com/ch/unternehmen/p...e&s=bsd&~ck=mn)
, since few days installed ubuntu 12.04 on it.

yesterday surfing web new laptop , realized takes long website load.
first thought private wlan network rebooted router.
problem persisted.
took old dell latitude 4300 see if has got same issue.
1 works perfect. full wlan performance gets picked up. (1,200 mb/s)
on dell xps (0,300 mb/s) most.

checked ping google , comparison surprising me:
dell xps 14 : 150ms
dell latitude: 15ms

10 times slower old laptop.
must on old laptop installed windows 7 should not matter here.

on new system see following cards when doing lspci:

00:00.0 host bridge: intel corporation ivy bridge dram controller (rev 09)
00:01.0 pci bridge: intel corporation ivy bridge pci express root port (rev 09)
00:02.0 vga compatible controller: intel corporation ivy bridge graphics controller (rev 09)
00:14.0 usb controller: intel corporation panther point usb xhci host controller (rev 04)
00:16.0 communication controller: intel corporation panther point mei controller #1 (rev 04)
00:1a.0 usb controller: intel corporation panther point usb enhanced host controller #2 (rev 04)
00:1b.0 audio device: intel corporation panther point high definition audio controller (rev 04)
00:1c.0 pci bridge: intel corporation panther point pci express root port 1 (rev c4)
00:1c.2 pci bridge: intel corporation panther point pci express root port 3 (rev c4)
00:1c.3 pci bridge: intel corporation panther point pci express root port 4 (rev c4)
00:1d.0 usb controller: intel corporation panther point usb enhanced host controller #1 (rev 04)
00:1f.0 isa bridge: intel corporation panther point lpc controller (rev 04)
00:1f.2 raid bus controller: intel corporation 82801 mobile sata controller [raid mode] (rev 04)
00:1f.3 smbus: intel corporation panther point smbus controller (rev 04)
01:00.0 3d controller: nvidia corporation device 1140 (rev a1)
07:00.0 ethernet controller: realtek semiconductor co., ltd. rtl8111/8168b pci express gigabit ethernet controller (rev 07)
08:00.0 network controller: intel corporation centrino advanced-n 6235 (rev 24)
09:00.0 unassigned class [ff00]: realtek semiconductor co., ltd. rts5116 pci express card reader (rev 01)
09:00.1 sd host controller: realtek semiconductor co., ltd. rts5116 pci express card reader (rev 01)


remember long first ubuntu, there issues non intel ethernet cards needed install drivers it. , realtek controller makes me bit nervous.
thought have intel® centrino® advanced-n 6235 controller in it.


have got idea how figure out problem might ?
or maybe else encountered same.


thanks,
detlef

posted detl_

hello everybody,
since few weeks have got new dell xps 14. (http://www.dell.com/ch/unternehmen/p...e&s=bsd&~ck=mn)
, since few days installed ubuntu 12.04 on it.

yesterday surfing web new laptop , realized takes long website load.
first thought private wlan network rebooted router.
problem persisted.
took old dell latitude 4300 see if has got same issue.
1 works perfect. full wlan performance gets picked up. (1,200 mb/s)
on dell xps (0,300 mb/s) most.

checked ping google , comparison surprising me:
dell xps 14 : 150ms
dell latitude: 15ms

10 times slower old laptop.
must on old laptop installed windows 7 should not matter here.

on new system see following cards when doing lspci:

00:00.0 host bridge: intel corporation ivy bridge dram controller (rev 09)
00:01.0 pci bridge: intel corporation ivy bridge pci express root port (rev 09)
00:02.0 vga compatible controller: intel corporation ivy bridge graphics controller (rev 09)
00:14.0 usb controller: intel corporation panther point usb xhci host controller (rev 04)
00:16.0 communication controller: intel corporation panther point mei controller #1 (rev 04)
00:1a.0 usb controller: intel corporation panther point usb enhanced host controller #2 (rev 04)
00:1b.0 audio device: intel corporation panther point high definition audio controller (rev 04)
00:1c.0 pci bridge: intel corporation panther point pci express root port 1 (rev c4)
00:1c.2 pci bridge: intel corporation panther point pci express root port 3 (rev c4)
00:1c.3 pci bridge: intel corporation panther point pci express root port 4 (rev c4)
00:1d.0 usb controller: intel corporation panther point usb enhanced host controller #1 (rev 04)
00:1f.0 isa bridge: intel corporation panther point lpc controller (rev 04)
00:1f.2 raid bus controller: intel corporation 82801 mobile sata controller [raid mode] (rev 04)
00:1f.3 smbus: intel corporation panther point smbus controller (rev 04)
01:00.0 3d controller: nvidia corporation device 1140 (rev a1)
07:00.0 ethernet controller: realtek semiconductor co., ltd. rtl8111/8168b pci express gigabit ethernet controller (rev 07)
08:00.0 network controller: intel corporation centrino advanced-n 6235 (rev 24)
09:00.0 unassigned class [ff00]: realtek semiconductor co., ltd. rts5116 pci express card reader (rev 01)
09:00.1 sd host controller: realtek semiconductor co., ltd. rts5116 pci express card reader (rev 01)


remember long first ubuntu, there issues non intel ethernet cards needed install drivers it. , realtek controller makes me bit nervous.
thought have intel® centrino® advanced-n 6235 controller in it.


have got idea how figure out problem might ?
or maybe else encountered same.


thanks,
detlef

check weather dell laptop listed here in ubuntu certified hardware list

http://www.ubuntu.com/certification/...tegory=netbook

if listed download relevant iso , re- install 12.04 in it..

should work fine

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