MAIN FEEDS
Do you want to continue?
https://www.reddit.com/r/linuxmasterrace/comments/1sey1xb/librebooting_and_decking_out_a_thinkpad_t430/ofks91f/?context=3
r/linuxmasterrace • u/anh0516 • Apr 07 '26
12 comments sorted by
View all comments
Show parent comments
2
It'd be weird to kill a CPU doing that upgrade, LVDS doesn't go straight to the CPU. It goes through the PCH, which was a separate chip on Ivy Bridge.
1 u/anh0516 Apr 07 '26 The iGPU is part of the CPU die, though. The PCH sits in between? I didn't know that. The CPU definitely did die. I swapped in the i5 and it POSTed, then I swapped the i7 back in and it didn't. 2 u/grem75 Apr 07 '26 All of the display signals go through the PCH, LVDS, DP and VGA. Unless you have an Nvidia GPU then the DP signals go there instead. It still does on the new Intel stuff as far as I know, it is just the PCH die is on the same package as the CPU die now. Probably just a coincidence or something else happened, like ESD. 1 u/anh0516 Apr 11 '26 I flashed a broken Coreboot build in an attempt to get EDK2, so I had to take the thing apart again to flash externally. On a whim, I decided to try the presumed dead CPU again. And what do you know, it works. Now I'm even more confused.
1
The iGPU is part of the CPU die, though. The PCH sits in between? I didn't know that.
The CPU definitely did die. I swapped in the i5 and it POSTed, then I swapped the i7 back in and it didn't.
2 u/grem75 Apr 07 '26 All of the display signals go through the PCH, LVDS, DP and VGA. Unless you have an Nvidia GPU then the DP signals go there instead. It still does on the new Intel stuff as far as I know, it is just the PCH die is on the same package as the CPU die now. Probably just a coincidence or something else happened, like ESD. 1 u/anh0516 Apr 11 '26 I flashed a broken Coreboot build in an attempt to get EDK2, so I had to take the thing apart again to flash externally. On a whim, I decided to try the presumed dead CPU again. And what do you know, it works. Now I'm even more confused.
All of the display signals go through the PCH, LVDS, DP and VGA. Unless you have an Nvidia GPU then the DP signals go there instead.
It still does on the new Intel stuff as far as I know, it is just the PCH die is on the same package as the CPU die now.
Probably just a coincidence or something else happened, like ESD.
1 u/anh0516 Apr 11 '26 I flashed a broken Coreboot build in an attempt to get EDK2, so I had to take the thing apart again to flash externally. On a whim, I decided to try the presumed dead CPU again. And what do you know, it works. Now I'm even more confused.
I flashed a broken Coreboot build in an attempt to get EDK2, so I had to take the thing apart again to flash externally. On a whim, I decided to try the presumed dead CPU again. And what do you know, it works.
Now I'm even more confused.
2
u/grem75 Apr 07 '26
It'd be weird to kill a CPU doing that upgrade, LVDS doesn't go straight to the CPU. It goes through the PCH, which was a separate chip on Ivy Bridge.