cprise wrote on 2014-04-03: > > On 04/01/14 22:38, Wei, Gang wrote: >> >> I saw two additional reserved memory region in BIOS e820 table between >> 1G~4G: >> >> TBOOT: 0000000020000000 - 0000000020200000 (2) >> ... >> TBOOT: 0000000040004000 - 0000000040005000 (2) >> >> The first region should be for igfx, but I don't know what the second region >> is for. > > Thanks Jimmy, > > Is there a way to probe this? I scanned the output of 'lspci -vvv' but > didn't see anything that matched those ranges. > > This system also has an Nvidia Optimus GPU, although its disabled in the > BIOS. Could that be the second region?
In my memory, the second region might be more possibly related with legacy usb support. Jimmy
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