Matteo, the default menu.lst doesn't contain any irqpoll or acpi=off lines; you have to add them yourself. Here's a howto document for the menu.lst (and GRUB, which uses the menu.lst): https://help.ubuntu.com/community/GrubHowto The section "Setting kernel parameters" explains how to add a boot parameter (like irqpoll). In short, you have to find a line starting with "# kopt=" and add the irqpoll parameter at the end of the line. Then save the menu.lst, run "sudo update-grub", and reboot. As Marvin wrote, you should try adding the pollirq option first, reboot, and check if it helped. If that option does not help, remove the irqpoll parameter again from that kopt line in menu.lst, and instead add the parameter acpi=off to that line. Reboot, and check if that parameter helps. Regards, Oliver Matteo Mambretti schrieb: > Dear all, > if it could help you: > - in the boot menu the serials are enabled. I tried "Enable" and > "Auto", but nothing seems to change. > - in the file /boot/grub/menu.lst I cannot find neither pollirq nor acpi... > > Thank you, > Matteo > > 2007/12/18, Marvin Stodolsky <marvin.stodolsky@xxxxxxxxx>: >> Folks >> >> Would some one send Matteo an example kernel line with irqpoll or >> acpi=off per my suggestions below. Until Friday, I won't be under >> Linux and cannot check syntax validity >> >> Matteo, >> >> 1) If you can access the bootup BIOS, check that the serial ports are >> in fact activated, >> as shutting off this service is an option on some newer PCs, favoring USB ports. >> . From what you havve described thus far, I doubt this is the problem, >> but it will not hurt to check. >> >> 2) Within /boot/grub/menu.lst , there are stansa specifying the boot >> up options, and within each a line specifying the kernel used and >> bootup options. In the options list following the kernel name, try the >> effects of successive (one at a time) the following options: >> pollirq , acpi=off >> Each time save, reboot, and test >> >> These modifiers change the power/irq management of the System >>
