(In reply to comment #38)
> Created an attachment (id=34795) [details]
> dmesg (for comment #38)
>
> > Can you disable the vesa fb driver in kernel configuration and see whether the issue still exists?
>
Thanks for the testing.
> Without the vesa fb driver there no big difference, only the "vga=" kernel
> parameter doesn't work anymore. The display switches from text mode to higher
> resolution later when the i915 module is loaded.
It seems that the issue still exists after removing the vesa fb driver.
>
> Yesterday I had again the situation where I could NOT recover from a "bad mode"
> (0x49) to a working one. After running "xrandr --output DVI1 --mode 0x49" the
> monitor went to standby mode. Then I tried to revert to mode 0x43, which
> resulted in the "out of sync" pattern (see attached dmesg).
The message of "out of sync" is related with SDVO DVI. I am not sure whether the issue is related with SDVO.
Can you connect this monitor by using VGA connector and see whether the issue can also be reproduced?
(In reply to comment #38)
> Created an attachment (id=34795) [details]
> dmesg (for comment #38)
>
> > Can you disable the vesa fb driver in kernel configuration and see whether the issue still exists?
>
Thanks for the testing.
> Without the vesa fb driver there no big difference, only the "vga=" kernel
> parameter doesn't work anymore. The display switches from text mode to higher
> resolution later when the i915 module is loaded.
It seems that the issue still exists after removing the vesa fb driver.
>
> Yesterday I had again the situation where I could NOT recover from a "bad mode"
> (0x49) to a working one. After running "xrandr --output DVI1 --mode 0x49" the
> monitor went to standby mode. Then I tried to revert to mode 0x43, which
> resulted in the "out of sync" pattern (see attached dmesg).
The message of "out of sync" is related with SDVO DVI. I am not sure whether the issue is related with SDVO.
Can you connect this monitor by using VGA connector and see whether the issue can also be reproduced?
Thanks
Yakui