Weird. I ran 9.10 Netbook Remix from flash drive on my U123. There was no issue booting up, which gave me confidence. (In hindsight, I didn't try to much around with the brightness.) So I decided to upgrade my installation of 9.04 to 9.10 through network. Upon first boot, the flickering happens with the brightness icon appearing and the brightness jumping around. However, after 30-60 seconds, the brightness stabilizes. I was able to reproduce the flickering by adjusting the brightness from the power management setting. The flicker happens for 10-20 seconds this time before stabilizing.
I did not change any setting from 9.04, nor did I disable KMS from boot.
Weird. I ran 9.10 Netbook Remix from flash drive on my U123. There was no issue booting up, which gave me confidence. (In hindsight, I didn't try to much around with the brightness.) So I decided to upgrade my installation of 9.04 to 9.10 through network. Upon first boot, the flickering happens with the brightness icon appearing and the brightness jumping around. However, after 30-60 seconds, the brightness stabilizes. I was able to reproduce the flickering by adjusting the brightness from the power management setting. The flicker happens for 10-20 seconds this time before stabilizing.
I did not change any setting from 9.04, nor did I disable KMS from boot.