On Monday 12 February 2018 20:48:47 Luca Coelho wrote: > On Tue, 2018-01-30 at 20:49 +0100, Pali Rohár wrote: > > Hello, > > Hi Pali, > > > > for almost 3 years I have a problem with Intel wifi card Centrino > > Advanced-N 6235. Its firmware periodically crash and in dmesg I'm > > seeing > > a message "Microcode SW error detected". > > > > Problem happens independently of kernel versions (I tried 3.8, 3.13, > > 3.18, 4.0, 4.9). Currently I'm using Debian Stretch and its 4.9 > > version. > > > > This wifi card is identified as: > > > > $ lspci -s 03:00.0 -vv > > 03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6235 (rev 24) > > Subsystem: Intel Corporation Centrino Advanced-N 6235 AGN > > [...] > > > And here is example of dmesg error flood: > > > > [26624.998823] iwlwifi 0000:03:00.0: Microcode SW error detected. Restarting 0x2000000. > > [...] > > > [26624.999013] iwlwifi 0000:03:00.0: Loaded firmware version: 18.168.6.1 > > [26624.999117] iwlwifi 0000:03:00.0: Start IWL Error Log Dump: > > [26624.999118] iwlwifi 0000:03:00.0: Status: 0x000002CC, count: 6 > > [26624.999120] iwlwifi 0000:03:00.0: 0x000028AA | ADVANCED_SYSASSERT > > [27464.823779] iwlwifi 0000:03:00.0: Loaded firmware version: 18.168.6.1 > > [27464.823903] iwlwifi 0000:03:00.0: Start IWL Error Log Dump: > > [27464.823904] iwlwifi 0000:03:00.0: Status: 0x000002CC, count: 6 > > [27464.823906] iwlwifi 0000:03:00.0: 0x000028AA | ADVANCED_SYSASSERT > > [...] > > > This really looks like firmware problem. What can I do with these > > microcode errors? Can you help me? > > Yes, this is a firmware problem. But unfortunately this is a really > old hardware (6 years old) and we don't support the firmware anymore. Hi! That is pity :-( > I'm sorry, but there is really nothing we can do. So can I debug this problem myself? Is there any documentation or resources for this? > I hope the driver manages to recover properly and WiFi continues to > work on your machine without much disturbance when this happens. > > -- > Cheers, > Luca. -- Pali Rohár pali.rohar@xxxxxxxxx
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