Overclock.net › Forums › Software, Programming and Coding › Operating Systems › Linux, Unix › Linux won't boot when set CPU multi x21
New Posts  All Forums:Forum Nav:

Linux won't boot when set CPU multi x21

post #1 of 36
Thread Starter 
Officially i5 750s doesn't support x21, however my mobo and many other allow me to force it.

I can use windows without any problems with this, but Ubuntu doesn't seen to like it, it simply won't boot.



Does anybody know why this is happening?

:/
post #2 of 36
overclocks aren't the same in linux as in windows, windows is generally more lax and lets you run the system what linux would consider unstable and fail on.
Current Rig
(14 items)
 
  
CPUMotherboardGraphicsRAM
FX-8350 4.6GHz@1.44v GA-990FXA-UD3 R4.0 HD 7950 (1100/1450) 8G Muskin DDR3 1866@8CLS 
Hard DriveOptical DriveOSMonitor
1TB WD LiteOn DVD-RW DL Linux/Windows 19" Phillips TV 1080p 
PowerCaseMouseMouse Pad
OCZ 600W Generic Junk Logitech MX400 Generic Junk 
Audio
SBL 5.1 
  hide details  
Reply
Current Rig
(14 items)
 
  
CPUMotherboardGraphicsRAM
FX-8350 4.6GHz@1.44v GA-990FXA-UD3 R4.0 HD 7950 (1100/1450) 8G Muskin DDR3 1866@8CLS 
Hard DriveOptical DriveOSMonitor
1TB WD LiteOn DVD-RW DL Linux/Windows 19" Phillips TV 1080p 
PowerCaseMouseMouse Pad
OCZ 600W Generic Junk Logitech MX400 Generic Junk 
Audio
SBL 5.1 
  hide details  
Reply
post #3 of 36
^ Pretty much that.

Linux uses the CPU a bit more efficiently than Windows, and is quite a bit more picky when it comes to OC's. It has to be... almost perfect. tongue.gif
post #4 of 36
To clarify though, it's not because windows is more stable, just that linux manages the CPU in a way that requires alot of stability but gives more speed sort of 'per clock'. I would actully want any overclock to be stressed in Linux, not Windows, because only then can you tell if it's really stable and your CPU is really safe in the long run. If it doesn't work in Linux, it probably isn't safe in the long term anyway.
post #5 of 36
Thread Starter 
This is not about stability, it's a kernel panic when I force my multi to be x21.

For instance, I'm running the same 3.8ghz but with x20 multi. The drawback of this is that I need extra VTT.
post #6 of 36
Quote:
Originally Posted by EduFurtado View Post

This is not about stability, it's a kernel panic when I force my multi to be x21.

For instance, I'm running the same 3.8ghz but with x20 multi. The drawback of this is that I need extra VTT.

yes, and I'm saying that if linux crashes, your CPU isn't safe in the long run anyway. you need to bring it down or raise vcore or something. this isn't a linux problem, it's an overclocking one. your OC isn't stable.
post #7 of 36
Quote:
Originally Posted by jrl1357 View Post

To clarify though, it's not because windows is more stable, just that linux manages the CPU in a way that requires alot of stability but gives more speed sort of 'per clock'. I would actully want any overclock to be stressed in Linux, not Windows, because only then can you tell if it's really stable and your CPU is really safe in the long run. If it doesn't work in Linux, it probably isn't safe in the long term anyway.

This actually makes sense! Since from experience, overclocking even just the smallest amount can cause certain unstability. I'm guessing that I am just lucky that my 2500k can run in linux @ 4.4 lol
lmao rig
(31 items)
 
lmao laptop
(20 items)
 
lmao server
(17 items)
 
CPUMotherboardGraphicsRAM
[AMD] Ryzen 5 1600X [Biostar] X370GT3 [Gigabyte] GTX 1080 windforce oc [G.Skill] Ripjaws V Series 16GB (2 x 8GB) DDR4 ... 
Hard DriveHard DriveHard DriveHard Drive
[Samsung] 960 evo m.2 250GB [Mushkin] eco2 512GB SSD [Mushkin] enhanced reactor 500GB SSD [Intel] 330 180GB SSD 
CoolingCoolingOSMonitor
[Corsairl] h100i v2 [Noctua] nf-S12a pwm 120mm fan x 5 [M$] Winblows 10 pro fortified and telemetry free [AOC] i2367f 23" IPS 
MonitorMonitorKeyboardPower
[AOC] i2367f 23" IPS [Dell] e2311h [Qisan] White Magicforce 68 w/ MX greens [Cougar] CMX 1000 
CaseMouseMouse PadAudio
[Fractal Design] Define C mini [Logitech] g900 chaos spectrum [GGing] black extended mousepad [Onkyo] TX-SR313 receiver 
AudioAudioAudioAudio
[KLH] Center and rear speakers [Realistic] MC-1000 front speakers [Insignia] Rocketboost subwoofer Audio-Technica] QuietPoint ath-anc7b 
AudioOtherOtherOther
[Zalman] clip mic [Keycool] KC21 keypad w/ Gateron greens [Orico] USB 3.0 HDD dock bay [Orico] 7-port powered USB 3.0 Hub 
OtherOtherOther
[Rosewill] 10-port powered USB 2.0 Hub [Belkin] 7-port powered USB 2.0 Hub [Phanteks] Cable extensions white 
CPUMotherboardGraphicsGraphics
[Intel] i7 6700HQ [Lenovo] ideapad y [Intel] HD 530 [AMD] Radeon R9 M375 4GB 
RAMRAMHard DriveHard Drive
[Samsung] 8GB DDR4 2133 [G.Skill] Ripjaws 8GB DDR4 2133 [Adata] Premier SP550 240GB SATA III M.2 SSD [Sandisk] X400 512GB SSD 
Optical DriveCoolingOSMonitor
[Asus] slim external DVD RW stock [M$] Winblows 10 fortified and telemetry free [Lenovo] 14" 1080p monitor 
KeyboardCaseMouseAudio
[Lenovo] integrated [Lenovo] y700 shell [Lenovo] touchpad integrated 
OtherOtherOtherOther
[Vortex] Poker II keyboard w/ MX Blacks [logitech] g303 daedalus apex mouse [WASD] v2 TKL w/ MX Clears (for work) [Dell] OEM optical mouse (for work) 
CPUMotherboardGraphicsRAM
[Intel] i7 2700k [Gigabyte] ga-z77-d3h [Intel] hd 3000 [G.Skill] Ares 16GB (4x4GB) DDR3 1600 
Hard DriveHard DriveHard DriveHard Drive
[Transcend] SSD320 128GB SSD (OS) [WD] Red 1TB [WD] Red 2TB [WD] Blue 1TB 
Hard DriveOptical DriveCoolingOS
[WD] Blue 2TB [Lite-on] dvd rw [Corsair] A70 Debian 9 Stretch x86_64 
PowerCaseOtherOther
[Antec] HCG 750w PSU [Antec] DF-35 [Biostar] USB 3.0 front bracket [kingwin] 3.5" hotswap bay (x2) 
Other
[Highpoint] Rocket 620 
  hide details  
Reply
lmao rig
(31 items)
 
lmao laptop
(20 items)
 
lmao server
(17 items)
 
CPUMotherboardGraphicsRAM
[AMD] Ryzen 5 1600X [Biostar] X370GT3 [Gigabyte] GTX 1080 windforce oc [G.Skill] Ripjaws V Series 16GB (2 x 8GB) DDR4 ... 
Hard DriveHard DriveHard DriveHard Drive
[Samsung] 960 evo m.2 250GB [Mushkin] eco2 512GB SSD [Mushkin] enhanced reactor 500GB SSD [Intel] 330 180GB SSD 
CoolingCoolingOSMonitor
[Corsairl] h100i v2 [Noctua] nf-S12a pwm 120mm fan x 5 [M$] Winblows 10 pro fortified and telemetry free [AOC] i2367f 23" IPS 
MonitorMonitorKeyboardPower
[AOC] i2367f 23" IPS [Dell] e2311h [Qisan] White Magicforce 68 w/ MX greens [Cougar] CMX 1000 
CaseMouseMouse PadAudio
[Fractal Design] Define C mini [Logitech] g900 chaos spectrum [GGing] black extended mousepad [Onkyo] TX-SR313 receiver 
AudioAudioAudioAudio
[KLH] Center and rear speakers [Realistic] MC-1000 front speakers [Insignia] Rocketboost subwoofer Audio-Technica] QuietPoint ath-anc7b 
AudioOtherOtherOther
[Zalman] clip mic [Keycool] KC21 keypad w/ Gateron greens [Orico] USB 3.0 HDD dock bay [Orico] 7-port powered USB 3.0 Hub 
OtherOtherOther
[Rosewill] 10-port powered USB 2.0 Hub [Belkin] 7-port powered USB 2.0 Hub [Phanteks] Cable extensions white 
CPUMotherboardGraphicsGraphics
[Intel] i7 6700HQ [Lenovo] ideapad y [Intel] HD 530 [AMD] Radeon R9 M375 4GB 
RAMRAMHard DriveHard Drive
[Samsung] 8GB DDR4 2133 [G.Skill] Ripjaws 8GB DDR4 2133 [Adata] Premier SP550 240GB SATA III M.2 SSD [Sandisk] X400 512GB SSD 
Optical DriveCoolingOSMonitor
[Asus] slim external DVD RW stock [M$] Winblows 10 fortified and telemetry free [Lenovo] 14" 1080p monitor 
KeyboardCaseMouseAudio
[Lenovo] integrated [Lenovo] y700 shell [Lenovo] touchpad integrated 
OtherOtherOtherOther
[Vortex] Poker II keyboard w/ MX Blacks [logitech] g303 daedalus apex mouse [WASD] v2 TKL w/ MX Clears (for work) [Dell] OEM optical mouse (for work) 
CPUMotherboardGraphicsRAM
[Intel] i7 2700k [Gigabyte] ga-z77-d3h [Intel] hd 3000 [G.Skill] Ares 16GB (4x4GB) DDR3 1600 
Hard DriveHard DriveHard DriveHard Drive
[Transcend] SSD320 128GB SSD (OS) [WD] Red 1TB [WD] Red 2TB [WD] Blue 1TB 
Hard DriveOptical DriveCoolingOS
[WD] Blue 2TB [Lite-on] dvd rw [Corsair] A70 Debian 9 Stretch x86_64 
PowerCaseOtherOther
[Antec] HCG 750w PSU [Antec] DF-35 [Biostar] USB 3.0 front bracket [kingwin] 3.5" hotswap bay (x2) 
Other
[Highpoint] Rocket 620 
  hide details  
Reply
post #8 of 36
Quote:
Originally Posted by EduFurtado View Post

Officially i5 750s doesn't support x21, however my mobo and many other allow me to force it.

I can use windows without any problems with this, but Ubuntu doesn't seen to like it, it simply won't boot.

Does anybody know why this is happening?

:/
Quote:
Originally Posted by EduFurtado View Post

This is not about stability, it's a kernel panic when I force my multi to be x21.

For instance, I'm running the same 3.8ghz but with x20 multi. The drawback of this is that I need extra VTT.

There's your answer. And as been said, Linux OC's need to be dang near perfect to be stable, if your kernel is panicking then you obviously aren't stable ( to keep things simple and rather blunt, think of a kernel panic as a windows bsod ) If your OC isn't stable in Windows, you'll BSOD, same in Linux just with a kernel panic. If it even starts. You've been told Windows is much more lax when it comes to OCing and therefor allows you to force x21, Linux is Windows' drill sergeant, he doesn't take any s-*, if it ain't perfect it ain't going anywhere.
post #9 of 36
Thread Starter 
Quote:
Originally Posted by jrl1357 View Post

Quote:
Originally Posted by EduFurtado View Post

This is not about stability, it's a kernel panic when I force my multi to be x21.

For instance, I'm running the same 3.8ghz but with x20 multi. The drawback of this is that I need extra VTT.

yes, and I'm saying that if linux crashes, your CPU isn't safe in the long run anyway. you need to bring it down or raise vcore or something. this isn't a linux problem, it's an overclocking one. your OC isn't stable.

Quote:
Originally Posted by CSCoder4ever View Post

Quote:
Originally Posted by jrl1357 View Post

To clarify though, it's not because windows is more stable, just that linux manages the CPU in a way that requires alot of stability but gives more speed sort of 'per clock'. I would actully want any overclock to be stressed in Linux, not Windows, because only then can you tell if it's really stable and your CPU is really safe in the long run. If it doesn't work in Linux, it probably isn't safe in the long term anyway.

This actually makes sense! Since from experience, overclocking even just the smallest amount can cause certain unstability. I'm guessing that I am just lucky that my 2500k can run in linux @ 4.4 lol

Quote:
Originally Posted by Shrak View Post

Quote:
Originally Posted by EduFurtado View Post

Officially i5 750s doesn't support x21, however my mobo and many other allow me to force it.

I can use windows without any problems with this, but Ubuntu doesn't seen to like it, it simply won't boot.

Does anybody know why this is happening?

:/
Quote:
Originally Posted by EduFurtado View Post

This is not about stability, it's a kernel panic when I force my multi to be x21.

For instance, I'm running the same 3.8ghz but with x20 multi. The drawback of this is that I need extra VTT.

There's your answer. And as been said, Linux OC's need to be dang near perfect to be stable, if your kernel is panicking then you obviously aren't stable ( to keep things simple and rather blunt, think of a kernel panic as a windows bsod ) If your OC isn't stable in Windows, you'll BSOD, same in Linux just with a kernel panic. If it even starts. You've been told Windows is much more lax when it comes to OCing and therefor allows you to force x21, Linux is Windows' drill sergeant, he doesn't take any s-*, if it ain't perfect it ain't going anywhere.

Makes no sense to me.

Proof: If I set my multi to x21 and lower my base clock a lot, so I get a low clock on the CPU, and the same thing happens.

Proof2: If I change my OC from x21 multi for 3800mhz and change it to x20 multi for 3800mhz but LOWER my voltages (hence making it unstable) it will boot just fine.

So this is an issue with the multi. The thing is, it makes no sense, because the multi is being set by the mobo and mobo only, since CPU control by the OS is turned off on my setup (bios)

I think we started with the wrong foot here. Do you have anything else in mind?
By the way, thanks for the discussion biggrin.gif
post #10 of 36
I'm sorry, but I'm really struggling to find the issue here. You say your motherboard doesn't support x21 and Linux isn't stable when running the motherboard in this unsupported mode, yet you can still get decent over clock speeds at x20? So just run your system at the supported and known stable configuration.

It's not like the extra overclock with give you any practical performance increase; yet the trade off is shortening the life of your components and massive instabilities. It strikes me as a lose / lose situation you're trying to force.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Linux, Unix
Overclock.net › Forums › Software, Programming and Coding › Operating Systems › Linux, Unix › Linux won't boot when set CPU multi x21