Hi,
Ich habe aufgrund eines Kernel-Bugs bzw. eines doofen BIOS folgendes Problem:
http://wiki.archlinux.org/index.php/Samsung_N140#SATA_exception.2C_freeze.2C_reset
Zusammenfassung:
A summary of the status as currently understood:
About 5 minutes after boot or resume, the BIOS switches on some power saving features which were not enabled at boot. It enables additional (sleepier) processor C-states, and sends power management instructions to the HDD. It does these behind the operating system's back -- not using ACPI, which would be handled correctly by Linux. Instead the sudden change results in a SATA exception at the first disk access following the switch. At that point the SATA driver resets the disk to resolve the problem. The result: the user sees a complete system freeze for about 30 seconds, after which operation of the machine continues normally. This can occur during the periodic fsck at boot if it is running at switch time. Either Samsung needs to be convinced to fix the BIOS, or the Linux kernel needs to be modified to behave more gracefully (Windows doesn't freeze noticeably if at all).
There is a kernel patch available which changes the backlight brightness using SMI instead of poking PCI config space. It does not solve the SATA problem. It provides a kernel module called "samsung-laptop". Interestingly the BIOS (in the N130 at least) can be informed that the OS is Linux but the effect hasn't been published. It is included in SuSE, but the claim that SuSE has no SATA problem has not been substantiated. Src here.
This problem is hazardous for your filesystem so take precautions. For example use ext3 (not ext4) with option data=journal and install backup software.
The N140 and N130 BIOSes have Phoenix FailSafe (you have been warned). It's not clear if the SATA problem has any relation to this.
Hat irgendjemand eine Idee für einen Workaround?
Oder ist es unter Linux nicht möglich den Bug zu beheben?
Leider weiß ich nicht wie man einen Kernel mit dem Samsung-Patch baut.
Gibt es noch andere Möglichkeiten?
Grüße