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sping
Developer
Joined: 16 Aug 2009
Posts: 25
Location: Germany, Berlin
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 Posted: Wed Jun 22, 2011 3:09 am Post subject: Help! Xorg "no devices detected" when booting from |
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Hello!
I have a desktop machine with an ATI Radeon HD 3450 PCI Express graphics card. With my local setup
- x11-base/xorg-server 1.9.4
- x11-drivers/xf86-video-ati 6.14.2
- Kernel 2.6.36-gentoo-r8
Xorg detects the card out of the box. Great.
Now I also boot the same hardware into a system from the network using this Grub entry:
| Code: | | kernel (hd0,4)/boot/vmlinuz-2.6.36-gentoo-r8 root=/dev/nfs nfsroot=192.168.XX.XX:/XXX/ rw ip=dhcp raid=noautodetect |
While the booting itself works well, Xorg does not detect my graphics card despite
- identical versions of Xorg and the Radeon driver
- identical version and configuration of the Kernel
Besides full auto-detection (i.e. empty /etc/X11/xorg.conf.d/) I have also tried manual pointing to the PCI Express slot (i.e. BusID "PCI:2:0:0"): still "no devices found".
Things I tried without luck:
- Using other versions of the kernel
- Using other versions of Xorg and the Radeon driver
- Extracting working config using "Xorg -configure" from the local installation and feeding that to the NFS root troublemaker
Any idea why my results differ?
I am thankful for your help! |
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BradN
Advocate
Joined: 19 Apr 2002
Posts: 2391
Location: Wisconsin (USA)
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| Posted: Thu Jun 23, 2011 12:40 am Post subject: |
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What happens if you chroot into the hard drive system after booting from NFS and then try to run X from the hard drive? You will probably have to double mount or bind mount one or more of /dev, /proc, /sys into the hard drive filesystem.
Another thought, anything unusual in the xorg log file when running from NFS? |
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sping
Developer
Joined: 16 Aug 2009
Posts: 25
Location: Germany, Berlin
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| Posted: Sun Jun 26, 2011 6:42 am Post subject: |
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| Quote: | | Another thought, anything unusual in the xorg log file when running from NFS? |
No.
| BradN wrote: | | What happens if you chroot into the hard drive system after booting from NFS and then try to run X from the hard drive? You will probably have to double mount or bind mount one or more of /dev, /proc, /sys into the hard drive filesystem. |
Interesting idea. I tried that and X did not start from the disk-based chroot either.
I played with a catalyst stage4 now (rather than stage3 plus my own chroot scripts before). For some reason X detects my graphics card now. I noticed that udev was not added too sysinit level before. While I started testing with xdm initially most of my test were against "startx". Seems like it was udev not running.
Thanks for your help! |
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BradN
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Joined: 19 Apr 2002
Posts: 2391
Location: Wisconsin (USA)
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| Posted: Sun Jun 26, 2011 5:33 pm Post subject: |
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No problem 
Any idea how udev wasn't being started? I thought it was always configured as default. |
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sping
Developer
Joined: 16 Aug 2009
Posts: 25
Location: Germany, Berlin
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| Posted: Sun Jun 26, 2011 6:37 pm Post subject: |
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| BradN wrote: | | Any idea how udev wasn't being started? I thought it was always configured as default. |
I checked, it was not added to any runlevel. Also, it seems xdm does not depend on it. udev provides "dev" and no-one seems to depend on "dev". Wierd:
| Code: | # fgrep -R "provide" /etc/init.d/udev
provide dev
# fgrep -R "need" /etc/init.d/ | grep -w dev
/etc/init.d/udev: need sysfs udev-mount udev-dev-tarball
/etc/init.d/udev-mount: # Seed /dev with some things that we know we need
/etc/init.d/udev-dev-tarball: need udev-mount |
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