[SOLVED] MBA 5,2 (2012) wifi powersave doesn't work

Hi all,
Though wifi works out of the box, powersaving doesn't on my MBA 5,2 (late 2012). The situation dates back to at least the 3.7.* kernels, and possibly before. Is this a known issue? Or perhaps is it solvable?
Many thanks!
# uname -a
Linux Arch 3.8.3-2-ARCH #1 SMP PREEMPT Sun Mar 17 13:04:22 CET 2013 x86_64 GNU/Linux
$ lspci | grep -i net
02:00.0 Network controller: Broadcom Corporation BCM43224 802.11a/b/g/n (rev 01)
# iwconfig
lo no wireless extensions.
wlan0 IEEE 802.11abgn ESSID:""
Mode:Managed Frequency:2.462 GHz Access Point:
Bit Rate=65 Mb/s Tx-Power=19 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
Link Quality=39/70 Signal level=-71 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:3085 Invalid misc:5211 Missed beacon:0
# iw dev wlan0 set power_save on
command failed: Operation not supported (-95)
# iw dev wlan0 get power_save
Power save: off
# dmesg | grep -e bcma | less
[ 4.673207] bcma-pci-bridge 0000:02:00.0: enabling device (0000 -> 0002)
[ 4.673364] bcma: bus0: Found chip with id 0xA8D8, rev 0x01 and package 0x08
[ 4.673448] bcma: bus0: Core 0 found: ChipCommon (manuf 0x4BF, id 0x800, rev 0x22, class 0x0)
[ 4.673529] bcma: bus0: Core 1 found: IEEE 802.11 (manuf 0x4BF, id 0x812, rev 0x17, class 0x0)
[ 4.673586] bcma: bus0: Core 2 found: PCIe (manuf 0x4BF, id 0x820, rev 0x0F, class 0x0)
[ 4.843255] bcma: bus0: Bus registered
[ 5.790551] brcmsmac bcma0:0: mfg 4bf core 812 rev 23 class 0 irq 17
[ 6.793389] brcmsmac bcma0:0: brcms_ops_bss_info_changed: qos enabled: false (implement)
[ 6.793432] brcmsmac bcma0:0: brcms_ops_config: change power-save mode: false (implement)
[ 18.217983] brcmsmac bcma0:0: brcms_ops_bss_info_changed: qos enabled: false (implement)
[ 18.218094] brcmsmac bcma0:0: brcms_ops_config: change power-save mode: false (implement)
[ 18.285286] brcmsmac bcma0:0: brcms_ops_bss_info_changed: qos enabled: false (implement)
[ 18.285396] brcmsmac bcma0:0: brcms_ops_config: change power-save mode: false (implement)
[ 24.240431] brcmsmac bcma0:0: brcmsmac: brcms_ops_bss_info_changed: associated
[ 24.240524] brcmsmac bcma0:0: brcms_ops_bss_info_changed: arp filtering: enabled true, count 0 (implement)
[ 24.240623] brcmsmac bcma0:0: brcms_ops_bss_info_changed: qos enabled: true (implement)
[ 30.609801] brcmsmac bcma0:0: brcms_ops_bss_info_changed: arp filtering: enabled true, count 1 (implement)
[13331.883101] brcmsmac bcma0:0: START: tid 1 is not agg'able
Last edited by LiamMcCalloway (2013-03-24 23:44:52)

Thanks for your pointers!
lspci -v
02:00.0 Network controller: Broadcom Corporation BCM43224 802.11a/b/g/n (rev 01)
Subsystem: Apple Inc. Device 00e9
Flags: bus master, fast devsel, latency 0, IRQ 17
Memory at a0400000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [40] Power Management version 3
Capabilities: [58] Vendor Specific Information: Len=78 <?>
Capabilities: [48] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [d0] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [13c] Virtual Channel
Capabilities: [160] Device Serial Number
Capabilities: [16c] Power Budgeting <?>
Kernel driver in use: bcma-pci-bridge
bcma-pci-bridge seems to be a driver, not a module so modinfo does give anything.
bcma and brcmsmac are both loaded, as are the modules modinfo say they depend on (mac80211,bcma,brcmutil,cfg80211,cordic)
modinfo -p yields nothing for either bcma or brcmsmac, so there can be no parameters to pass on the kernel, I think.
I tried unloading and reloading the modules, to no avail....

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[/Edit]

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(sorry for english, I'm czech)

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EDITING ORIGINAL POST TO POST SOLUTION so I don't do a massive bump
Installed windows and ran the BIOS flasher that came with the battery. Didn't work until I changed a line in the plaintext configuration file (config.ini or something) it comes with. Changed "Capacity: 20" to "Capacity: -10". This changed the battery charge requirement from 20% to negative ten percent (any negative number will do), allowing the program to run and flash the BIOS. Didn't realize I could do that, but it fixed the problem 100%.
#### BEGIN ORIGINAL POST: ################################
Hey guys,
I'm a bit of a linux noob, but I've spent many hours this week trying to fix this issue on my own and have learned a lot about making custom kernels, hardware stuff, ACPI, and ABS. However, nothing I've done has worked and I've hit a wall. For reference, I'm on a Sony Vaio VGN-FZ4000 with linux-3.0 base kernel, gnome3/gdm. The battery is made in china and doesn't list a manufacturer, just model number BPS8, 52000mAh.
[Backstory]
So I recently got an OEM battery to replace the broken original, which hasn't worked since before I installed arch (though it worked with an Arch install I did a couple years ago). When I first plugged it in, the gnome battery symbol popped up listing the battery at 0% with an exclamation icon. I unplugged from AC power and the laptop still ran, but the battery monitor just said it was at 0% and 'Estimating' remaining time. I figured this was a glitch with gnome or just because it was this battery's first cycle so I let it run down until it hard-crashed. Then I plugged back into AC and tried to turn on the computer, but it wouldn't do anything until I removed the battery.
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[/backstory]
[tl;dr] DSDT firmware contains malformed battery description, now I can't get my system to run with a custom DSDT. [/tl;dr]
Attempted solutions:
[1]
Extract, modify, recompile DSDT and include it with the kernel compilation .config options
CONIFG_ACPI_CUSTOM_DSDT=y
CONFIG_ACPI_CUSTOM_DSDT_FILE="/usr/src/custom_dsdt.hex
CONIFG_STANDALONE=n
as suggested here, a page linked to by the arch wiki page on DSDT.
I followed the instructions but no matter what this has generated errors during the kernel compilation, sometimes due to every line containing unexpected \231 (or other numbers) characters, sometimes finding some error in the DSDT file and then claiming that the driver it was compiling (ol.c somewhere in the drivers/acpi section I believe) had references to undefined functions all over the place. I CANNOT compile with a custom DSDT specified.
[2]
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acpitool and $ cat /proc/acpi/battery/BAT0/info have consistently claimed the information specified in the BIOS-supplied DSDT; the battery is non-rechargeable and is discharging at an unknown rate. Sometimes acpi will even report that the battery has zero capacity.
The arch wiki does say mkinitcpio doesn't support the dsdt hook as of 2.6.30, but [1] didn't work either and mkinitcpio -H dsdt still told me to try this so I did.
[3]
The final solution I have tried has been to do [2] but to recompile the kernel with the legacy support for battery and ac adapter stuff disabled. I tried this because it was suggested in the kernel.log;
Sep 13 11:51:03 localhost kernel: [ 11.740059] ACPI: Deprecated procfs I/F for AC is loaded, please retry with CONFIG_ACPI_PROCFS_POWER cleared
Sep 13 11:51:03 localhost kernel: [ 11.753434] ACPI: AC Adapter [ADP1] (on-line)
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but all this does is remove the battery/ and adp1/ folders from /proc/acpi/ and break acpitool functionality. The log still doesn't mention the dsdt hook, either.
[4]
The old way to do this was to use the acpi-dsdt-initrd-patch-* patch, but that hasn't been updated for modern kernels, presumably because of the new "functionality" from mkiniticpio. The current kernel .config doesn't include any options for ACPI initrd/initramfs support or reading a DSDT from initramfs, which is the functionality provided by this patch.
This covers all the methods I've been able to find on the internet and I'm at a loss for what to do. Am I doing something wrong in [1]? Under what conditions will the compiler fail/succeed with a CONFIG_ACPI_CUSTOM_DSDT_FILE?
When I recompile I fix the 'Zero' definition and a couple compiler errors and warnings. The errors come from section length definitions, which read as 0x00000000 rather than the appropriate max-min value so I fix those, and the warnings come from _T_* methods belonging to the compiler, so I refactor the code to remove the initial underscores. The last warning comes from an isolated And statement that's within brackets (compiler complains it doesn't do anything), but if I remove that the compiler fails hard.
Thanks to anyone who's read this far. Please let me know if you have any ideas how to get my system to use a customized DSDT.
Last edited by paraffin (2011-09-29 23:20:30)

Thanks for the offer, Radioactive man However, I'm actually compiling a customized kernel with the linux-ck and -sony patches, so your packages won't help. (The custom kernel works fine and I've tested this battery behavior on the the regular, -ck, and -sony kernels as well)
Anyway, so I tried another compile with
CONFIG_PREVENT_FIRMWARE_BUILD=n in addition to the options listed in [1] and that time it compiled.
Unfortunately it still didn't load the DSDT!
I did catch a quick little error message that turned up in kernel.log though;
/var/log/kernel.log:Sep 15 11:50:24 localhost kernel: [ 0.925780] acerhdf: unknown (unsupported) BIOS version Sony Corporation/VGN-FZ4000E/R2110J7, please report, aborting!
acerhdf is a fan controller module for the Aspire One, and perhaps I left that in the kernel config and it's preventing the custom DSDT from loading, even though the acerhdf module never gets loaded itself, nor is it in my rc.conf or anything else... If that was the cause of all this, I'm gonna be angry...
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Anyway, thanks for your help and time:

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[2012-09-03 06:30] synchronizing package lists
$ ls -lhA /etc | grep localtime
lrwxrwxrwx 1 root root 36 Sep 3 04:34 localtime -> /usr/share/zoneinfo/America/Montreal
My first guess was that the localtime offset was preventing me from accessing pacman's repositories, but since it worked yesterday (when the time was already corrupt) it seems otherwize. Now I'm quite lost, especially since no one seems to report every pacman repository being down... could anyone please help me solve this problem?
Thanks!
Last edited by miek (2012-09-03 20:28:44)

WonderWoofy wrote:I think you may find relevant information here. I ahve seem many of these threads in the forums lately. Are you dual booting w/ another operating system... in particular, one that uses localtime for the hardware clock (and there is only one that does this).
Thanks I'll look at that entry. Still I'd like to point out that this page clearly says that the timezone is to be set in rc.conf, which is a bit confusing. I must've followed this guide to get to my current configuration. I am dual booting with multiple other systems (xubuntu, win7, puppy, crunchbang) so from what I've read win7 might be the problem, but I haven't started it since i installed arch and my time has been off from the start.
Should I simply use NTP now that pacman is working again?
Thanks
Last edited by miek (2012-09-03 17:41:56)

Wifi connection doesn´t work in Mac Book 5.1 with windows 7 x86 via bootcamp 4

I have installed Bootcamp 4 drivers and all features are fully working except the Wireless conncetion.
The airport wifi scans and works but i click connect to my wifi and i get an error saying that it´s not possible to connect.
In the Mac OS X side wifi works perfectly and in an other computer with Win7 works the connection..
Anyone know what can i do?
i tried reinstalling everything (bootcamp drivers, Windows7 OS, installing other version of boot camp)but i can´t fix this problem
thanks for helping

It depends on your Mac model. Please see System requirements to install Windows on your Mac via Boot Camp - Apple Support.
For example, for a 13 inch 2012 MBP it is Boot Camp Support Software 4.1.4586.
Post Date: Mar 14, 2013
File Size: 414.74 MB
System Requirements
Mac mini (Late 2012)
Mac mini Server (Late 2012)
MacBook Pro (Retina, 13-in, Mid 2012)
iMac (21.5-in, Late 2012)
iMac (27-in, Late 2012)
Windows 7

WiFi suddenly doesn't work. Connection time exceeded

Hi
A few days ago my WiFi connection in my Mac Book PRO 13'' with Mac OS X Lion 10.7.4 worked fine but today I can't connect to my WiFi. I get the error:
Connection time exceeded
I didn't change anything... I've tried deleting the default connection, deleting System Configuration folder in /Library/Preferences but it doesn't wok. Any idea?
Thank you

I do not know whether or not it will address your issue, but I would reset the SMC. Since it is the same problem on other networks, it appears the problem is related to your computer.
Barry

[SOLVED] MBA 5,2 (2012) wifi powersave doesn't work

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