Here is the scenario of my Lenovo 3000 G430 Laptop:
System configuration:
P4 Dual core T3200 CPU
3GB RAM (1+2 in two slots)
500GB HDD
Partition layout for HDD:
170GB Priamry - NTFS (for Windows installation)
296GB Logical - NTFS (for data drive)
30GB Logical - EXT4 (for Ubuntu /)
4GB Logical - SWAP (for swap area)
I was using above partition layout to run Windows 7 Ultimate and Ubuntu 12.04. At that time there was no problem in the system.
Then I decided to upgrade to Windows 8. I actually fresh installed Windows 8 instead of upgrading. Everything worked properly without any issue (of course I had to restore MBR from Ubuntu live CD by using 'grub-install' and 'update-grub' to make system dual-boot again).
Then I decided to upgrade Ubuntu to 14.04. The upgrade worked without any issue. But in the Ubuntu system I encountered the problem of having high CPU usage very similar with the problem described here.
http://askubuntu.com/questions/501840/ubuntu-14-04-used-too-much-processor-after-latest-updatest
The problem was almost same as above expect that I did not have any overheat or shutdown problems. I also enabled intel_pstate as described above but not seen any improvement.
I thought it may be due to some wrong user configuration that carried forward from 12.04 to 14.04 so I fresh installed Ubuntu 14.04 by making some changes on partition layout as following:
170GB Primary - NTFS (for Windows installation)
288GB Logical - NTFS (for data drive)
8GB Logical - EXT4 (for Ubuntu /home)
30GB Logical - EXT4 (for Ubuntu /)
4GB Logical - SWAP (for swap area)
But not able to solve the problem.
Then I thought, let's finish Windows 8 installation by installing necessary software. From that point I experienced freezing of Windows boot at during startup logo, not even able to get into safe mode.
So I decided to reinstall Windows 8, but the system freezed in the same way, even from the boot disk. So, I doubted the on the partition layout which might became unrecognisable to Windows system (it shouldn't ideally but just the sake of confirmation) I then unplugged the HDD and tried to run Windows 8 installation disk, as boot disks don't require HDD to boot. But the same problem existed even without HDD.
Then I chose Hiren's boot CD which has Mini Windows XP as live edition. It has the same problem, froze just before the boot logo. (Same bootable disk works well on other PC.)
The Linux based boot disks have no problem in booting. Even my Ubuntu is working fine except the CPU problem. To confirm the problem is not in CPU itself, I tried to run live disk of Ubuntu 12.04 and it worked perfectly.
Luckily, I had previous backup of Windows 7 so tried to restore it from the installation disk of Windows 7. The booting was very slow but I was able to get the installation screen. From there I restored the backup of Windows 7.
The restore process was extremely slow, took almost 4 hours but completed successfully. Then with hope I booted in Windows 7 but same problem... froze at startup logo. This entire scenario puzzled me a lot. Why any Windows refuses to boot on my system while Linux distros have no problems to boot.
What I doubt is that Ubuntu 14.04 made some damage in hardware... but is it even possible?
Can someone tell me what exactly happened to my laptop?
System configuration:
P4 Dual core T3200 CPU
3GB RAM (1+2 in two slots)
500GB HDD
Partition layout for HDD:
170GB Priamry - NTFS (for Windows installation)
296GB Logical - NTFS (for data drive)
30GB Logical - EXT4 (for Ubuntu /)
4GB Logical - SWAP (for swap area)
I was using above partition layout to run Windows 7 Ultimate and Ubuntu 12.04. At that time there was no problem in the system.
Then I decided to upgrade to Windows 8. I actually fresh installed Windows 8 instead of upgrading. Everything worked properly without any issue (of course I had to restore MBR from Ubuntu live CD by using 'grub-install' and 'update-grub' to make system dual-boot again).
Then I decided to upgrade Ubuntu to 14.04. The upgrade worked without any issue. But in the Ubuntu system I encountered the problem of having high CPU usage very similar with the problem described here.
http://askubuntu.com/questions/501840/ubuntu-14-04-used-too-much-processor-after-latest-updatest
The problem was almost same as above expect that I did not have any overheat or shutdown problems. I also enabled intel_pstate as described above but not seen any improvement.
I thought it may be due to some wrong user configuration that carried forward from 12.04 to 14.04 so I fresh installed Ubuntu 14.04 by making some changes on partition layout as following:
170GB Primary - NTFS (for Windows installation)
288GB Logical - NTFS (for data drive)
8GB Logical - EXT4 (for Ubuntu /home)
30GB Logical - EXT4 (for Ubuntu /)
4GB Logical - SWAP (for swap area)
But not able to solve the problem.
Then I thought, let's finish Windows 8 installation by installing necessary software. From that point I experienced freezing of Windows boot at during startup logo, not even able to get into safe mode.
So I decided to reinstall Windows 8, but the system freezed in the same way, even from the boot disk. So, I doubted the on the partition layout which might became unrecognisable to Windows system (it shouldn't ideally but just the sake of confirmation) I then unplugged the HDD and tried to run Windows 8 installation disk, as boot disks don't require HDD to boot. But the same problem existed even without HDD.
Then I chose Hiren's boot CD which has Mini Windows XP as live edition. It has the same problem, froze just before the boot logo. (Same bootable disk works well on other PC.)
The Linux based boot disks have no problem in booting. Even my Ubuntu is working fine except the CPU problem. To confirm the problem is not in CPU itself, I tried to run live disk of Ubuntu 12.04 and it worked perfectly.
Luckily, I had previous backup of Windows 7 so tried to restore it from the installation disk of Windows 7. The booting was very slow but I was able to get the installation screen. From there I restored the backup of Windows 7.
The restore process was extremely slow, took almost 4 hours but completed successfully. Then with hope I booted in Windows 7 but same problem... froze at startup logo. This entire scenario puzzled me a lot. Why any Windows refuses to boot on my system while Linux distros have no problems to boot.
What I doubt is that Ubuntu 14.04 made some damage in hardware... but is it even possible?
Can someone tell me what exactly happened to my laptop?