[G33] CRT monitor no signal

[Hà Thanh Tuấn]

My PC specs is Intel E5300, 2GB DDR2 Dual, Gigabyte G31M-ES2C, VGA onboard G31 and CRT monitor 17'. I downloaded Ubuntu 10.04 desktop i386 Beta 1. I burned it into a cd, and when i boot from cd and choose live cd, i see a boot splash. After about 45s, i don't see anything on screen, and my screen show a small text "No Signal 5 4 3 2 1..." (mean no signal from pc to monitor). But, after 5m, i press power button, and after about 15s, cd tray is eject, when i press enter, the cd tray is close, and computer power is off. Second, i boot from cd and choose "install with out use live cd" (or other), after boot splash, i don't see anything, too (above). I never seen anything like this in Ubuntu 8.04, 8.10, 9.04, 9.10, Debian and WinXP/Vista/7. I hope the final release of lucid will not have this problem.

[lspci]
00:00.0 Host bridge [0600]: Intel Corporation 82G33/G31/P35/P31 Express DRAM Controller [8086:29c0] (rev 10)
     Subsystem: Giga-byte Technology Device [1458:5000]
00:02.0 VGA compatible controller [0300]: Intel Corporation 82G33/G31 Express Integrated Graphics Controller [8086:29c2] (rev 10)
     Subsystem: Giga-byte Technology Device [1458:d000]

[Bryce Harrington (bryce)]

Hi Ha,

Please attach the output of `lspci -vvnn` and `dmesg`, and attach your /var/log/Xorg.0.log (and maybe Xorg.0.log.old) file from after reproducing this issue. If you're using a custom /etc/X11/xorg.conf please attach that as well.

[This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

[Hà Thanh Tuấn (tuanht)]

here my files that i grab from tty1 on live cd

[Bryce Harrington (bryce)]

Ha Thanh, do not attach files as tarballs but as individual files. Otherwise our scripts cannot easily process them and it blocks your report from being further reviewed. I'm resetting it to Incomplete so you can try again.

[Hà Thanh Tuấn (tuanht)]

I'm sorry. I try again

[Hà Thanh Tuấn (tuanht)]

I'm sorry. I try again

[Hà Thanh Tuấn (tuanht)]

dmesg

[Hà Thanh Tuấn (tuanht)]

and last, Xorg.0.log

[Bryce Harrington (bryce)]

I notice this in the Xorg.0.log which looks odd:

(II) intel(0): DDCModeFromDetailedTiming: Ignoring tiny 1x1 mode
(II) intel(0): DDCModeFromDetailedTiming: Ignoring tiny 1x1 mode

Perhaps something is wrong with the EDID of the monitor. Do you have other types of CRTs available you could test with to see if it works properly if you just change monitors?

One other thing to try would be to boot with kernel modesetting turned off, using the kernel parameter i915.modeset=0 ?

[Hà Thanh Tuấn (tuanht)]

I don't have other CRTs. But I tried use parameter i915.modeset=0. It's worked. Thanks very much. And last, have any problems when i use this parameter?.

[Karl Sam (karolus.magnus)]

Hello, I'm having a very similar problem. I have the same video chipset as Ha Thanh. But my CRT monitor is 16 inch; The brand/model is DELL M770. And I'm using the final release of Lucid Lynx.

I'm currently running in low graphics mode. One question, how do I boot with "kernel modesetting turned off, using the kernel parameter i915.modeset=0"?

[Karl Sam (karolus.magnus)]

Attaching "lspci -vvnn" output

[Karl Sam (karolus.magnus)]

dmesg output

[Karl Sam (karolus.magnus)]

Xorg.0.log

[Karl Sam (karolus.magnus)]

Just FYI, This problem doesn't happen in Ubuntu 9.04

[Hà Thanh Tuấn (tuanht)]

With live cd, press Esc, it's will show a languages list, choose your language. choose your choice (normal is "Try ubuntu without..." or "Install Ubuntu") [highlight, don't press enter], press F6, press ESC, and type this parameter to end of boot command. if you installed on your pc, in grub menu, choose your choice (highlight, don't press enter), press "e", you'll see a text editor with commands need to boot, in line have "linux /boot/vmlinuz-2.6.32-21-generic root=UUID=8f314a60-5852-44dd-a0ca-33833c64c140 ro splash quiet" (or something like that), type this param to end of line, press Ctrl + X to boot. If you want grub2 alway use this param, please see at https://wiki.ubuntu.com/Grub2 to known how to customize grub2. Sorry because my English is bad.

[Karl Sam (karolus.magnus)]

Thank you, Ha Thanh. But I found an alternative way before you posted to turn off the kernel-mode-setting

From http://www.ubuntu.com/getubuntu/releasenotes/1004

"Working around bugs in the new kernel video architecture

Ubuntu 10.04 LTS enables the new kernel-mode-setting (KMS) technology by default on most common video chipsets. While this is a major step forward for the graphics architecture in Ubuntu, in some rare cases KMS will prevent your video output from working correctly, or from working at all. If you need to disable KMS, you can do so by booting with the nomodeset option. You can also save this setting so that it's applied at every boot by adding it to your grub config (for GRUB 2: edit /etc/default/grub and add nomodeset to GRUB_CMDLINE_LINUX, then run sudo update-grub; for GRUB 1: edit /boot/grub/menu.lst and add nomodeset to the line beginning with # kopt=, then run sudo update-grub). (533784, 541501)"

Thank you again, Ha Thanh.

So, what doers turning KMS off mean? What will happens to anything that demands high video usage (like video games or editing video files)?

[Karl Sam (karolus.magnus)]

I created a different bug report because I noticed differences between the logs

[Hà Thanh Tuấn (tuanht)]

In Youtube, i can see in fullscreen mode and it's not slow (jaunty is very slow). But, wallpaper change effect still slow. I think no big problem happen if turning KMS off. As i know, this bug only appear in kernel 2.6.32

[Chris Wilson (ickle)]

The issue was a conflict with vga16fb.