Fed up with trying to make the on-board RealTek chip work, I acquired a
wireless USB device...which exhibits the exact same problems. It's a
Ralink device, rather than RealTek, using a completely separate driver.
I've also tried using the upstream 3.4 rc6 kernel
(3.4.0-030400rc6-generic) to no apparent (positive) effect.
At this juncture, I do not believe the issue to be related to the
drivers or devices. I have another laptop (also Lenovo, but a T61
rather than an E525) running 12.04 64-bit (3.2.0.25-generic kernel) as
well, using the Intel wireless chip, and it does not experience these
issues, so it does not appear to be something related to an interaction
between 64-bit Precise and the router.
Is everyone on this bug using 64-bit? Does anyone experience the issues
with 32-bit?
------
lsusb from the new Ralink USB adapter:
===============================
Bus 001 Device 002: ID 148f:3070 Ralink Technology, Corp. RT2870/RT3070
Wireless Adapter
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x148f Ralink Technology, Corp.
idProduct 0x3070 RT2870/RT3070 Wireless Adapter
bcdDevice 1.01
iManufacturer 1 Ralink
iProduct 2 802.11 n WLAN
iSerial 3 1.0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 67
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 450mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 7
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 5 1.0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x04 EP 4 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x05 EP 5 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x06 EP 6 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0000
(Bus Powered)
lspci -v -s 05:00.0 for the built-in RealTek adapter:
=======================================
05:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE
802.11b/g/n WiFi Adapter (rev 01)
Subsystem: Realtek Semiconductor Co., Ltd. Device 8195
Physical Slot: 0
Flags: bus master, fast devsel, latency 0, IRQ 18
I/O ports at 2000 [size=256]
Memory at f0900000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [40] Power Management version 3
Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [70] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [140] Virtual Channel
Capabilities: [160] Device Serial Number 01-91-81-fe-ff-4c-e0-00
Kernel driver in use: rtl8192ce
Kernel modules: rtl8192ce
OF NOTE: I have never once seen "RTL8188CE" in the kernel driver
section, even after building the driver from the RealTek website. It's
*always* come up "rtl8192ce" for me. When people are quoting this, are
they including the actual case used? It's possible that I've never
successfully activated the compiled driver from RealTek, and just don't
know it. Of course, that would be it's own issue.
Enabling or disabling power management on the devices has no effect.
Enabling or disabling software/hardware encryption has no effect.
--
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https://bugs.launchpad.net/bugs/902557
Title:
Wireless not working in 12.04 for rtl8192ce (RTL8188CE)
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