Difference between revisions of "User:Samnob"

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Here's some stuff:
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[http://samnoble.org Sam Noble] is a freedom lover and software enthusiast. You can contact him at [mailto://s@mnoble.net s@mnoble.net]
  
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== Content License ==
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I hereby license [https://www.coreboot.org/Special:Contributions/Samnob all my contributions to the Coreboot wiki] under [https://creativecommons.org/licenses/by-sa/3.0/legalcode CC BY-SA 3.0].
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--[[User:Samnob|Samnob]] ([[User talk:Samnob|talk]]) 17:25, 18 March 2017 (UTC)
  
 
== Hardware, coreboot supported computers ==
 
== Hardware, coreboot supported computers ==
  
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I had/have a number of [[Lenovo_x60x]] laptops some x60,x60s x60tablet.
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I have or have had access to a number of
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Also some Lenovo_t60 laptops.
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*[[Board:lenovo/x60]] laptops
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**[[Board:lenovo/x60|x60]]
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**[[Board:lenovo/x60|x60s]]
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**[[Board:lenovo/x60|x60tablet]]
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**Also some [[Board:lenovo/t60|T60 laptops]].
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*and a [[Board:asus/f2a85-m]]-csm
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*and a [[ASUS_M2A-VM]]
  
 
There are a lot of files related to them at [http://samnoble.org/thinkpad On the web]
 
There are a lot of files related to them at [http://samnoble.org/thinkpad On the web]
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== some x60 native vga init notes ==
 
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On 16 December I tried out using [http://www.coreboot.org/Lenovo_x60x#VGA_Option_ROM_.2F_VBIOS_replacement_.28native_graphics.29[ native vga init]] on the x60.
 
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At that date their was working code in master, missing only commit [http://review.coreboot.org/#/c/3998/[commit 3998 ]] which was unmerged.
 
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It was discovered that while this code seems to work fine on kernels older than linux 3.12.
 
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On 3.12 and later kernels the i915 driver became unstable. Causing broken/glitchy 3D. and performance bugs.
 
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git bisect of the kernel eventually pointed to this commit:
 
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[https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=17fec8a08698bcab98788e1e89f5b8e7502ababd]
 
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[http://samnoble.org/tmp/nativevgainit_bisect.log]
 
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phcoder: upon seeing that commit, looked at a hexdump the x60's VGA controller:
 
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00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03)
 
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00: 86 80 a2 27 07 00 90 00 03 00 00 03 00 00 80 00
 
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10: 00 00 30 e4 a1 50 00 00 08 00 00 d0 00 00 40 e4
 
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20: 00 00 00 00 00 00 00 00 00 00 00 00 aa 17 1a 20
 
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30: 00 00 00 00 90 00 00 00 00 00 00 00 0b 01 00 00
 
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40: 00 00 00 00 48 00 00 00 09 00 09 51 02 04 0a 90
 
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50: 0e 00 30 00 19 00 00 00 00 00 00 00 00 00 80 7f
 
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60: 00 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00
 
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70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 
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80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 
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90: 05 d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 
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a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 
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b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 
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c0: 00 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 
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d0: 01 00 22 00 00 00 00 00 00 00 00 00 00 00 00 00
 
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e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 
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f0: 03 00 64 34 ff 00 00 00 86 0f 05 00 00 00 00 00
 
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< phcoder>  well this shows that Linux had a bug which caused it to miss stolen memory altogether on this machine and hence disable parts of code. With this bug fixed the code in question is active.
 
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So my guess is that it's a bug on coreboot side and it was missed because parts of Linux code were inadvertently disabled.
 

Latest revision as of 17:26, 18 March 2017

Sam Noble is a freedom lover and software enthusiast. You can contact him at s@mnoble.net

Content License

I hereby license all my contributions to the Coreboot wiki under CC BY-SA 3.0. --Samnob (talk) 17:25, 18 March 2017 (UTC)

Hardware, coreboot supported computers

I have or have had access to a number of

There are a lot of files related to them at On the web

Retrieved from "https://www.coreboot.org/index.php?title=User:Samnob&oldid=24712"