Black screen on boot. When using vga=xxx option.
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Invalid
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Undecided
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Unassigned |
Bug Description
My post concerns Ubuntu Intrepid Ibex default kernels (2.6.27-2.3, 2.6.27-3.4 tested).
I can only see black screen during boot when using my favourite "vga=79"1 or "vga=792" options ("splash" and "quiet" removed from grub menu.lst option of course). Problem also affects Alt+F1,F2... terminals after boot. However "gdm" starts without any problems.
First observed such a behaviour on (early and final stage) Ubuntu 7.10 (there where no problems on 7.04 and 8.04).
To prove that the problem is in the kernel (not in the distro), I applied 2.6.27-2.3 kernel to my Ubuntu 8.04 what caused the black screen during boot. When 2.6.27-3.4 was published I repeated the procedure again with black screen as a result.
Test were carried out on nVidia GeForce 6600 GT and ATI Rage Mobility cards on totally different machines.
If you need debugging information please let me know. I assume attaching "lsusb", "lspci", "dmesg" results is pointless. What do you need then?
Thank you for taking the time to report this bug and helping to make Ubuntu better. Unfortunately we can't fix it without more information.
Please include the following additional information (after booting with the "vga=xxx" option), if you have not already done so (pay attention to lspci's additional options), as required by the Ubuntu Kernel Team:
1. Please include the output of the command "uname -a" in your next response. It should be one, long line of text which includes the exact kernel version you're running, as well as the CPU architecture.
2. Please run the command "dmesg > dmesg.log" after a fresh boot and attach the resulting file "dmesg.log" to this bug report.
3. Please run the command "sudo lspci -vvnn > lspci-vvnn.log" and attach the resulting file "lspci-vvnn.log" to this bug report.
For your reference, the full description of procedures for kernel-related bug reports is available at https:/ /wiki.ubuntu. com/KernelTeamB ugPolicies Thanks in advance!