Arch Linux

Description:

Horizontal colored lines in tty and X with the kernel 3.15.2-1 + free driver radeon + Radeon HD 3200. No problem with the LTS kernel (3.10.45-1) with same configuration.

Additional info:
* package version(s):
linux 3.15.2-1
xf86-video-ati 1:7.4.0-2

* config and/or log files etc.

dmesg | grep radeon
[ 4.748289] [drm] radeon kernel modesetting enabled.
[ 4.748392] fb: conflicting fb hw usage radeondrmfb vs VESA VGA - removing generic driver
[ 4.972418] radeon 0000:01:05.0: VRAM: 320M 0x00000000C0000000 - 0x00000000D3FFFFFF (320M used)
[ 4.972422] radeon 0000:01:05.0: GTT: 512M 0x00000000A0000000 - 0x00000000BFFFFFFF
[ 4.973533] [drm] radeon: 320M of VRAM memory ready
[ 4.973536] [drm] radeon: 512M of GTT memory ready.
[ 4.986560] radeon 0000:01:05.0: WB enabled
[ 4.986566] radeon 0000:01:05.0: fence driver on ring 0 use gpu addr 0x00000000a0000c00 and cpu addr 0xff870c00
[ 4.986570] radeon 0000:01:05.0: fence driver on ring 3 use gpu addr 0x00000000a0000c0c and cpu addr 0xff870c0c
[ 4.986596] [drm] radeon: irq initialized.
[ 4.986728] radeon 0000:01:05.0: setting latency timer to 64
[ 5.018832] [drm] radeon: power management initialized
[ 5.261246] fbcon: radeondrmfb (fb0) is primary device
[ 5.365762] radeon 0000:01:05.0: fb0: radeondrmfb frame buffer device
[ 5.365773] radeon 0000:01:05.0: registered panic notifier
[ 5.366320] [drm] Initialized radeon 2.33.0 20080528 for 0000:01:05.0 on minor 0

cat /etc/X11/xorg.conf.d/20-radeon.conf
Section "Device"
Identifier "Card0"
Driver "radeon"
# Option "SWcursor" "off" #software cursor might be necessary on some rare occasions, hence set off by default
# Option "EnablePageFlip" "on" #supported on all R/RV/RS4xx and older hardware, and set on by default
# Option "AccelMethod" "EXA" #valid options are XAA, EXA and Glamor. Default value varies per-GPU.
# Option "RenderAccel" "on" #enabled by default on all radeon hardware
# Option "ColorTiling" "on" #enabled by default on RV300 and later radeon cards
# Option "EXAVSync" "off" #default is off, otherwise on. Only works if EXA activated
Option "EXAPixmaps" "off" #when on icreases 2D performance, but may also cause artifacts on some old cards. Only works if EXA activated
Option "AccelDFS" "off" #default is off, read the radeon manpage for more information
EndSection

Steps to reproduce:

Boot with kernel 3.15.x