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Re: Power saving features for iwl4965

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On Sun, Jun 9, 2013 at 1:28 AM, Pedro Francisco
<pedrogfrancisco@xxxxxxxxx> wrote:
> On Mon, Jun 3, 2013 at 3:18 PM, Stanislaw Gruszka <sgruszka@xxxxxxxxxx> wrote:
>> On Mon, Jun 03, 2013 at 10:52:39AM +0200, Tino Keitel wrote:
>>> (...)
>>> It would be really nice to have proper power management in a current
>>> kernel, as the laptop gets noticeably hotter with the current iwlegacy
>>> driver.  That's why I still use a 3.1.10 kernel with an old
>>> forward-ported iwlagn driver.
>>
>> Could you try this experimental patch? (...)
>
> I am trying the iwlegacy powersave patch along with CPU scheduler BFS
> and IO scheduler BFQ.
>
> I've got this today: (...)
>
> $ uname -a
> Linux s2 3.9.4-301.local.fc19.i686
>
> I have just made a clean boot (as in, this has not happened after a
> resume for suspend or hibernation).
>
> May it be related to the patch? Or may heavy IO with out-of-tree CPU
> scheduler BFS and out-of-tree IO scheduler BFQ be responsible for the
> warnings?

I also got a SYSASSERT:
[Jun 9 10:35] iwl3945 0000:02:00.0: Read idx for DMA queue txq_id (2)
idx 186 is out of range [0-256] 186 186
(...)
[  +0,000164] iwl3945 0000:02:00.0: Read idx for DMA queue txq_id (2)
idx 185 is out of range [0-256] 186 186
[Jun 9 10:36] iwl3945 0000:02:00.0: Microcode SW error detected.
Restarting 0x82000008.
[  +0,000008] iwl3945 0000:02:00.0: Loaded firmware version: 15.32.2.9
[  +0,000034] iwl3945 0000:02:00.0: Start IWL Error Log Dump:
[  +0,000004] iwl3945 0000:02:00.0: Status: 0x000302E4, count: 1
[  +0,000004] iwl3945 0000:02:00.0: Desc       Time       asrtPC
blink2 ilink1  nmiPC   Line
[  +0,000224] iwl3945 0000:02:00.0: SYSASSERT     (0x5) 0228106348
0x008B6 0x0035E 0x0031C 0x00000 267

[  +0,000010] iwl3945 0000:02:00.0: Error Reply type 0x00000001 cmd
UNKNOWN (0xFC) seq 0x2099 ser 0x00FC0000
[  +0,000466] iwl3945 0000:02:00.0: Can't stop Rx DMA.
[  +0,001647] ieee80211 phy0: Hardware restart was requested
[Jun 9 10:38] iwl3945 0000:02:00.0: Read idx for DMA queue txq_id (2)
idx 186 is out of range [0-256] 186 186
(...)

I disabled powersave (but kept running the same kernel) and none of
the errors appeared again.
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