lost interrupt (Irq 15) when booting Fedora 6 on my laptop
 

Hello All,
My laptop is an Acer Travelmate 520TX.I had trouble installing Windows and Linux on same due to an lost interrupt (Irq 15),meaning that I could not use my cdrom drive.
I finally was able to install Fedora 6 on my laptop by using the command "linux irqpoll" at boottime.

Fedora works fine but no cdrom. I get the following message:
localhost kernel: idecd: cmd 0x3 timed out
localhost kernel: hdc: lost interrupt

The command: dmesg | grep -i hdc, gives the following result:
[johan@localhost ~]$ dmesg |grep -i hdc
ide1: BM-DMA at 0x6058-0x605f, BIOS settings: hdc:DMA, hdd:pio
hdc: CD-224E, ATAPI CD/DVD-ROM drive
hdc: selected mode 0x42
hdc: lost interrupt
hdc: lost interrupt
hdc: ATAPI 24X CD-ROM drive, 128kB Cache, UDMA(33)
hdc: lost interrupt

I would very much appreciate if someone could help to overcome this problem. Thank you very much beforehand.
Johan

Try booting using the same irqpoll boot option on the kernel line.

When the grub splash screen is displayed press any key.
Select the Linux boot choice and press the 'e' key
Select the kernel line and again press the 'e' key
Add a space followed by the boot switch: irqpoll
When done press the 'Enter' key followed by the 'b' key

If this resolves the issue make the change in the /boot/grub/grub.conf file as root using your choice of text editor. The above process is a one time temporary change nothing is changed peramentally until you edit the grub.conf file.

If you have not already done so, please update FC6 to the latest released packages. Many, many changes have taken place since FC6 was released including the kernel, maybe the latest kernel resolves this issue without the boot switch.

lost interrupt (Irq 15) when booting Fedora 6 on my laptop
 

Hello All,

I wish to thank Lenard for his reply to my problem with lost interrupt (irq15). The information he gave solved my problem completely.
Thanks again Lenard.
Johan