On Wed, 17 Mar 2010 01:51:13 +0000 Chris Vine <chris@xxxxxxxxxxxxxxxxxxxxx> wrote: > Hi, > > I have a Lenovo S12 (Ideapad) netbook with a BCM4312 802.11b/g > [14e4:4315] wireless device. Although this works using the PIO option > in kernel 2.6.33/2.6.33.1 (not with DMA) using the in-kernel b43 > driver, and also works with the broadcom proprietary wl driver, it > breaks after a suspend or hibernate. Attempts to bring up the wlan0 > interface with 'ifconfig wlan0 up' after suspension or hibernation > results in the following message (although nothing is revealed by > dmesg): > > SIOCSIFFLAGS: Unknown error 132 > > More worryingly, when suspending or hibernating, acpi sometimes > but not always appears to write to the CMOS. On two occasions I > have observed that although a reboot into 2.6.33 would work (until > there is another suspension or hibernation), wireless becomes > permanently switched off when rebooting into 2.6.32 or earlier - when > reading from the BIOS, kernel 2.6.32 and below appears to think that > the radio has been disabled even though the BIOS set-up screen > disagrees. When this occurs, I have to restore all defaults in the > BIOS to get wireless to come on again in kernel 2.6.32 and less. [snip] This regression between 2.6.32 and 2.6.33 is still present in 2.6.34-rc2, with an added twist. In 2.6.34-rc2, on resuming from suspension or hibernation, my rfkill button is completely disabled - that is, I cannot switch wireless on, but I also cannot switch bluetooth off. Chris -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
