With xubuntu-16.04.1-desktop-amd64.iso live cd: the bug does *not*
With xubuntu-16.10-desktop-amd64.iso live cd: the bug *does* appear.
The test detailed: I booted with the usb stick, choosed "try xubuntu",
issued a "sudo ufw enable", "sudo apt-get update", (have not issued
"dist-upgrade" nor "upgrade"), "sudo apt-get install rdesktop",
"rdesktop -u xxuserxx -k hu -g 1400x700 -a 16 -z -P -r
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xorg 100% cpu when scrolling in rdesktop
Status in xserver-xorg-video-ati package in Ubuntu:
After upgrading from Ubuntu 8.10 to 9.04, my rdesktops to Windows servers are
Screen refreshes inside rdesktop are awfully slow. Scrolling a logfile causes
xorg to take 100% cpu.
I'm using Ubuntu 9.04 as default as possible, no xorg.conf editing or
other vga drivers.
I have a ThinkPad Z60m with an ATI x600 mobility:
root@tp:~# lspci |grep -i vga
01:00.0 VGA compatible controller: ATI Technologies Inc M24 1P [Radeon
Very easy to reproduce with default settings:
- launch laptop from Ubuntu 9.04 live cd
- open rdesktop or tsclient to a Windows machine
- open a large logfile or a putty window
- watch how the screen in building up line per line, slowing down even more
near the buttom of the screen
I tested other ThinkPads with other vga cards, they don't have this issue.
- Z61m with ATI x1400 = ok
- R61 with nVidia = ok
A few more observations:
- 2D and 3D in Ubuntu works fine with the new default driver (great job :-)
- Visual Effects (Compiz?) work fine, on 'normal' and even 'extra', but have
no effect on the reported issue. I always disable the visial effects.
- scrolling in other applications works fine and fast (FF3, gedit,
- I use rdesktop in a windowed mode (1280x960), RDPv5
- I tried rdesktop bitmap caching enable/disable, same for both
- when I launch a Windows RDP inside my rdesktop, this 2nd RDP does NOT
suffer the same problem
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