September 1, 2010 at 10:30 pm #166445CrispyMember
Firstly I’m new here so hello! 😉
As titled implies I own a N150 netbook as well as a compaq of the same chipset.
I build alot of multi-booting systems and I am very familiar with win7,xp and linux based systems.
Most of my PCs I setup when I get them to boot into more than one Operating system.
To get background on my problem my standard setup usually is something like (using grub hd layouts):
hd0,0 – Win7 Ultimate (Still getting used to still have annoyances to fix)
hd0,1 – XP Pro (Main os)
hd0,2 – XP Pro Test (Lets me fiddle and break various things)
hd0,3 – Extended Part
hd0,4 – Small FAT32 Partition Grub4dos files
hd0,5 – Linux Swap
hd0,6 – Ubuntu Netbook 10.4
hd0,7 – Browser linux (Want a webbrowser and wifi in under 20seconds?)
hd0,8 – Rest of space Fat32 Storage Partition.
I use grub4dos to switch between OSs. Each windows partition is hidden from each other and made active when needed so they are completely indepedant. This is a tried and tested system I’ve used dozens of times.
My problem is that when I chose a different OS the n150 will reboot just after boot device init ( around 2-3 seconds into the boot process ). If I chose that OS again its fine and boots.
If I swap between Win7 and ubuntu no odd reboots.
If i swap between the two XPs no odd reboots.
So it seems XP is the odd one out.
I’ll point out now that my other netbook which is identical in hardware except the Wifi card does not do this so its something N150 (bios?) specific.
I thought perhaps something to do with fact that XP was not setup using AHCI where the others were but since then I’ve managed to post install swap over to AHCI and the problem persists.
There are also these strange options in the bios which I believe lies the problem
AHCI Mode Control (initially set to auto). The description claims it auto detects XP and auto turns off AHCI mode which I suspect is causing the reboots. However manually setting AHCI mode on which should cause no harddrive to be found on any normal XP install with no addtional drivers does not. So even in “manual” mode the bios is still switching harddrive modes which I believe is causing the reboots. This I suspect also makes installing linux based OSs difficult because they often probe the hardware and a IDE probe / AHCI probe will both make the n150 reboot.
At time of this writing latest version of bios is 08JI.
I suspect this post will just gives others clues about their problems but if anyone has figured anything out further please let me know.
My next task is trying to figure out how xp is being detected by the bios…..
On a different topic:
Searching the forums earlier I saw alot of people having trouble with usb booting and I believe I could shed a little light on things.
Another “feature” of the samsung’s bios is that it always treats usb hds / flash sticks as a second hd when booting.
For example in grub terms most normal bioses when booting off a usb hd will treat it as hd0 so any boot loader on the usb device will search itself first. The n150 always treats the internal hd as hd0 and the usb device as hd1 no matter what the boot order is.
This can often screw up some usb rescue / installer systems.
In my case my rescue grub4dos system kept reading the gdlr / config from the internal hd ( which I had screwed up) not my rescue disk. In the end I had to rename the internal hd gdlr in the end to something to avoid the problem.
Also to avoid someone telling me I’ve voided my warrenty by removing the original crippled version of windows I backed it up before even booting it so I can resell/send for repair.
Big post I won’t hold my breath for any info back but I can hope 😀October 5, 2010 at 11:16 am #215952
Anyone have found the solution to this problem? “My problem is that when I chose a different OS the n150 will reboot just after boot device init ( around 2-3 seconds into the boot process ). If I chose that OS again its fine and boots.” as Crispy said.
Thanks.October 9, 2010 at 12:50 pm #215953
Anyone know the answer, please??October 13, 2010 at 12:05 pm #215954
Anybody there?October 13, 2010 at 12:40 pm #215955moktirMember
Well i have the same problem on my N150, i’m dual booting Windows 7 Starter and XP, if i chose the one which wasn’t loaded the last time just after selecting it it will reboot, then it will work fine the second time. I’ve asked about it on other forums and never got any explanation as to why it happens.November 4, 2010 at 4:05 pm #215956daz101Member
Same here on the NB30 XP and Linux Mint only it hosed the splash screen so denying bios and recovery options.
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