I've just installed Lubuntu 16.04 on my old HP compaq nc8430 laptop which has ati mobility radeon x1600 graphics card with its own 256MB RAM. Everything went fine apart from the fact that I face severe flickering if resolution is set 1680x1050. This is native resolution of the laptop monitor. There was no flickering before when running win7 on same resolution and there is no flickering on 1280x800 resolution I'm using now to avoid epilepsy seasure :) This fact rules out that something is wrong with the graphics card.
I did a bit of research and these are the other things I've learned/tried:
- There is no way to install fglrx drivers on ubuntu 16.04.
- I've added
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash radeon.dpm=1"as suggested on official site which has maybe helped with heating but it obviously hasn't helped with flickering
- There was a suggestion to add new mode to xrandr which I tried, added successfully but flickering remained when switched to that mode
xrandr --newmode "1680x1050_60.00" 146.25 1680 1784 1960 2240 1050 1053 1059 1089 -hsync +vsync
Just for the record, when listing xrandr modes only the problematic resolution has a number > 60 (60.11) next to it (which is I presume refresh rate), all other modes have < 60 (59.70-59.98) so this is now my main suspect. Thank for your time and effort, Kanwal