This article provides solution for EEPROM checksum problem with Atheros cards. I've successfully used it to repair Atheros based Wistron Neweb CM9.
wifi%d: unable to attach hardware: 'EEPROM checksum invalid' (HAL status 7)
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In the last few days I was solving problem with accessing EEPROM in Atheros cards in case there is checksum error when loading MadWifi + original Atheros HAL.
After few hours of experiments I found working solution provided by madwifi-old driver in combination with OpenHAL (from ath-driver.org), which is open-source implementation of Atheros HAL (not yet finished). Here are few notes how to get these things to work.
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If you ever tried to use Atheros MiniPCI module (ie. Wistron Neweb CM9) in older computer, you probably failed. The reason is old revision of PCI bus. PCI 2.2 introduces 3.3 volt availability for peripherals usage. The new Atheros MiniPCI modules require this feature. If you use them in PCI reduction in older motherboard, you need to find 3.3V source somewhere else. There are few ways how to get around this, one of them is described in this article.
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Nedávno jsme v CZFree v Dejvicích řešili problém s OSPF, Quaggou a možností nastavit pro jednotlivé neighbor OSPF routery různý cost linky v případě, že jsou na stejném interfacu. Bohužel se nepodařilo Quaggu donutit, aby se tak chovala (netvrdím, že to nejde). Přistoupili jsme proto k vymýšlení workaroundu. Padly následující návrhy:
Nakonec zvítězil druhý návrh – řešení přes 802.1Q VLAN.
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Asi před 14 dny se v madwifi-devel konferenci objevila zmínka o patchi na regulaci výkonu pro madwifi-ng. Posílal jsem informaci na CZFree forum. Zatím nikdo nezpochybnil ani nepotvrdil funkčnost regulace na 5GHz.
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I had one faulty NEC Aterm WL54AG card at home and I disassembled it 
. Here are instructions how to do it.
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