[SOLVED] No dvd-drive in Gentoo

skalman93 · 07-02-2009, 05:30 PM

# ls -l /dev/cdrom

Code:

ls: cannot access /dev/cdrom: No such file or directory

NathanZachary · 07-03-2009, 10:13 AM

As Neddy pointed out, check to see if you have a /dev/sr0. If you don't, I'm thinking you might not have included the appropriate (P/S)ATA controller support in your kernel.

i92guboj · 07-03-2009, 04:26 PM

Please, post here the output of lspci.

Also, paste your kernel .config on pastebin.com or a similar service, and let us a link to it here.

skalman93 · 07-04-2009, 05:31 AM

No, I don't have a /dev/sr0

# lspci

Code:

00:00.0 Host bridge: ALi Corporation M1697 HTT Host Bridge
00:01.0 PCI bridge: ALi Corporation PCI Express Root Port
00:02.0 PCI bridge: ALi Corporation PCI Express Root Port
00:03.0 PCI bridge: ALi Corporation PCI Express Root Port
00:04.0 PCI bridge: ALi Corporation PCI Express Root Port
00:11.0 PCI bridge: ALi Corporation M5249 HTT to PCI Bridge
00:12.0 Ethernet controller: ALi Corporation ULi 1689,1573 integrated ethernet. (rev 60)
00:13.0 USB Controller: ALi Corporation USB 1.1 Controller (rev 03)
00:13.1 USB Controller: ALi Corporation USB 1.1 Controller (rev 03)
00:13.2 USB Controller: ALi Corporation USB 1.1 Controller (rev 03)
00:13.3 USB Controller: ALi Corporation USB 2.0 Controller (rev 01)
00:14.0 Audio device: ALi Corporation High Definition Audio/AC'97 Host Controller (rev 01)
00:15.0 ISA bridge: ALi Corporation PCI to LPC Controller (rev 10)
00:15.1 Bridge: ALi Corporation M7101 Power Management Controller [PMU]
00:16.0 IDE interface: ALi Corporation M5229 IDE (rev c7)
00:16.1 IDE interface: ALi Corporation ULi M5288 SATA
00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control
01:00.0 VGA compatible controller: nVidia Corporation G71 [GeForce 7950 GT] (rev a1)

Where can I find my .config?

i92guboj · 07-04-2009, 06:54 AM

Quote:

Originally Posted by skalman93

Where can I find my .config?

If you are not sure, you can try this:

Code:

zcat /proc/config.gz > config.txt

If all went well, you should have a copy of your running kernel configuration in config.txt, then you can post it to pastebin or whatever.

NeddySeagoon · 07-04-2009, 07:01 AM

skalman93,

Your drive controller chip is

Code:

00:16.0 IDE interface: ALi Corporation M5229 IDE (rev c7)
00:16.1 IDE interface: ALi Corporation ULi M5288 SATA

with that information we can check your kernel settings.

The steps are

Code:

cd /usr/src/linux
make menuconfig

to see and change options. Under

Code:

Device Drivers  --->

look for

Code:

 < > ATA/ATAPI/MFM/RLL support  --->

that setting must be off.
If you have any /dev/hd... device names in /etc/fstab or in grub.conf they will need to be changed. I'll cover that later.
In the

Code:

SCSI device support  --->

menu, set

Code:

  │    < > RAID Transport Class                                          │ │  
  │ │    -*- SCSI device support                                           │ │  
  │ │    < > SCSI target support                                           │ │  
  │ │[*] legacy /proc/scsi/ support                                    │ │  
  │ │        *** SCSI support type (disk, tape, CD-ROM) ***                │ │  
  │ │    <*> SCSI disk support                                             │ │  
  │ │    < > SCSI tape support                                             │ │  
  │ │    < > SCSI OnStream SC-x0 tape support                              │ │  
  │ │    <*> SCSI CDROM support                                            │ │  
  │ │    [ ]   Enable vendor-specific extensions (for SCSI CDROM)          │ │  
  │ │    <*> SCSI generic support                                          │ │  
  │ │    < > SCSI media changer support                                    │ │  
  │ │        *** Some SCSI devices (e.g. CD jukebox) support multiple LUNs │ │  
  │ │[*] Probe all LUNs on each SCSI device

all other options on that menu should be off as you don't need them.
If they are not off, you will build options you don't need but it otherwise harmless. The key things here are

Code:

<*> SCSI disk support
<*> SCSI CDROM support

all your devices will appear with SCSI /dev/sd.. names, even if they are actually PATA devices.
Go back up a menu level and find

Code:

<*> Serial ATA (prod) and Parallel ATA (experimental) drivers  --->

Turn it on if its off and go into the menu. In that menu, choose only

Code:

[*]   ATA ACPI Support
<*>   AHCI SATA support[*]   ATA SFF support
<*>     ALi PATA support

Save the changes and rebuild and reinstall your kernel in the normal way. If your are a genkenrel user, yuo need to make the changes after genkernel has started, by add int the

Code:

--menuconfig

option to its command line.

These changes will give all your storage devices SCSI names, which will affect booting if your hard drive is currently named like /dev/hdX. In /etc/fstab *and* in /boot/grub/grub.conf you need to change all instances of /dev/hdX to /dev/sdX (the h to an s)

When you boot into your new kernel you will have a /dev/sr0 which will be your CDROM. udev should have made the /dev/cdrom symlink so everything 'just works'.
If you currently use hdparm to set up /dev/hd.. parameters, you may see some boot errors as the SCSI standard demands that some features that are optional on PATA are fixed in SCSI. e.g. DMA. It can no longer be off.

skalman93 · 07-05-2009, 08:51 AM

Allright, I did what you said NeddySeagoon. I still don't have a /dev/cdrom or a /dev/sr0 but the light on the drive flashes when I close the tray and this line was added to /etc/fstab when I booted the new kernel.

Code:

/dev/cdrom              /media/cdrom    auto umask=0,users,iocharset=utf8,noauto,ro,exec 0 0

Quote:

Originally Posted by i92guboj

If you are not sure, you can try this:

Code:

zcat /proc/config.gz > config.txt

If all went well, you should have a copy of your running kernel configuration in config.txt, then you can post it to pastebin or whatever.

I tried that, but I don't have any /proc/config.gz

i92guboj · 07-05-2009, 09:16 AM

Try to look in /usr/src/<whatever kernel you are using>/.config

uname -a should tell what kernel version you are using. But it's really strange that you don't have /proc/config.gz, unless you disabled it manually (and then you should know you did).

NeddySeagoon · 07-05-2009, 09:22 AM

skalman93,

Something went wrong with either my instructions or you following them. The kernel will not have changed /etc/fstab, so the /dev/cdrom line was there before that.

First, lets look at your running kernel. Post the output of

Code:

uname -a

The date and time that shows is the build date of the running kernel. Does it look correct ?

Now lets check your kernels. Run

Code:

ls -l /boot

and post the output. Does it include a directory called grub?
If not, it should be empty. If you just have your new kernel here, you forgot to mount /boot before your kernel was installed.

Now run

Code:

mount /boot
ls -l /boot

This may look quite different. Again look for the grub directory that shows that this is your real /boot.
Post the output.

If thats the problem, you need only repeat the kernel install steps.

i92guboj · 07-05-2009, 09:44 AM

I just remembered one thing...

I had to add this to the kernel boot line for it to detect the ata dvd correctly, I don't know the reason of the background, but... It might worth a try.

Code:

atapi_enabled=1

In grub.conf would look like this:

Code:

title vmlinuz-2.6.28.10
        root (hd0,4)
        kernel /vmlinuz-2.6.28.10 3 root=/dev/sdb8 lapic panic=5 atapi_enabled=1 video=uvesafb:1600x1200-32,mtrr:3,ywrap

skalman93 · 07-05-2009, 02:21 PM

It works! I enabled

Code:

[*]   Enable vendor-specific extensions (for SCSI CDROM)

Just below the SCSSI CDROM Support.
Thanks alot! :-)