Comment 4 for bug 160102

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Gavin McCullagh (gmccullagh) wrote :

Hi,

I can confirm this bug (or a very similar one) with my mother's laptop (a Dell Latitude CSx) and the same wireless card:

gavin@chris:~ $ sudo lsusb
Bus 001 Device 002: ID 0d5c:a002 Belkin F5D6050 802.11b Adapter
Bus 001 Device 001: ID 0000:0000

In answer to Brian's question, in my case the crash doesn't happen during the boot process. Invariably, I get to the gdm login screen, get to login and then after a minute or two (I suspect after a decent bit of network access), the system freezes up completely with two of the 3 keyboard LEDs blinking together. The <ctrl><alt><sysrq> hotkeys do nothing, a hard reset is all that you can do. I've repeated this multiple times.

I booted the feisty 2.6.17 kernel and all worked fine again, so this appears to be a regression. For now, for her benefit I've set up grub to boot that kernel.

I upgraded to Hardy, hoping the newer 2.6.24 kernel wouldn't exhibit the issue. It crashes in the same way as 2.6.22 did.

I think I need to try a couple of things:

1. Boot without the wifi card and see is everything okay (just to
    isolate that as the issue.
2. Perhaps upgrade to intrepid or install the Intrepid kernel and
    see does that crash too.

The driver for the Fd6050 is the at76c503 which was never accepted into Linus' kernel. I think Ubuntu package it themselves. I guess the bug should be against that package and should be linked against hardy (which is supported for some time to come) as well as gutsy.

gavin@chris:~ $ lspci
00:00.0 Host bridge: Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX Host bridge (rev 03)
00:01.0 PCI bridge: Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX AGP bridge (rev 03)
00:03.0 CardBus bridge: Texas Instruments PCI1225 (rev 01)
00:03.1 CardBus bridge: Texas Instruments PCI1225 (rev 01)
00:07.0 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ISA (rev 02)
00:07.1 IDE interface: Intel Corporation 82371AB/EB/MB PIIX4 IDE (rev 01)
00:07.2 USB Controller: Intel Corporation 82371AB/EB/MB PIIX4 USB (rev 01)
00:07.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 03)
01:00.0 VGA compatible controller: Neomagic Corporation NM2360 [MagicMedia 256ZX]
01:00.1 Multimedia audio controller: Neomagic Corporation NM2360 [MagicMedia 256ZX Audio]
06:00.0 Ethernet controller: Xircom Cardbus Ethernet 10/100 (rev 03)
06:00.1 Serial controller: Xircom Cardbus Ethernet + 56k Modem (rev 03)

gavin@chris:~ $ lsmod |grep at7
at76c505_rfmd 5772 0
at76c503_rfmd_acc 5900 0
at76c503 92896 2 at76c505_rfmd,at76c503_rfmd_acc
at76_usbdfu 6532 1 at76c503
usbcore 134912 6 at76c505_rfmd,at76c503_rfmd_acc,at76c503,at76_usbdfu,uhci_hcd