Frozen system when booting with dual-head setup (updates)

Question

Hi guys,
I made a fresh install a couple of weeks ago and I configured my system for a dual-head setup following the wiki. I activated KMS and added radeon to the kernel parameters.
My xorg.conf looks like this:
Section "Monitor"
Identifier "DVI-0"
Option "PreferredMode" "1920x1080"
Option "Position" "0 0"
EndSection
Section "Monitor"
Identifier "HDMI-0"
Option "PreferredMode" "1920x1080"
Option "Position" "1920 0"
EndSection
I was having random freezes for a couple of days, but I didn't pay too much attention to it. I hard rebooted my computer when it froze and it could boot normally that second time.
But after yesterday, last update to the open source drivers xf86-video-ati (1:7.5.0-2) and lib32-mesa-libgl (10.5.2-1), my system doesn't boot unless I disconnect one of the screens. When only one screen it's connected everything is fine. If I plug the second screen, it pops up the KDE service to configurate the second screen but as soon I press 'apply the chages' my system freezes and I had to hard reboot.
I've tried all possible combinations usingt different outputs from the screens, getting the same results. Two of them connected --> freezes after grub loading. One connected --> boot Ok, but as soon as I plug the second one and I apply changes, freezes.
I found one configuration that doesn't freeze my system. When I plug the second screen, as I said, KDE service automatically pops up. Before I was changing the positions of the screen, one beside the other one, and my system freezes when I apply the changes. If I just left the default configuration (one screen in top of the other), it doesn't freeze my system. After that, I can rearrange the screens, as I need them, and it doesn't freeze.
Here it is my grub.cfg
# DO NOT EDIT THIS FILE
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
### BEGIN /etc/grub.d/00_header ###
insmod part_gpt
insmod part_msdos
if [ -s $prefix/grubenv ]; then
load_env
fi
if [ "${next_entry}" ] ; then
set default="${next_entry}"
set next_entry=
save_env next_entry
set boot_once=true
else
set default="0"
fi
if [ x"${feature_menuentry_id}" = xy ]; then
menuentry_id_option="--id"
else
menuentry_id_option=""
fi
export menuentry_id_option
if [ "${prev_saved_entry}" ]; then
set saved_entry="${prev_saved_entry}"
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi
function savedefault {
if [ -z "${boot_once}" ]; then
saved_entry="${chosen}"
save_env saved_entry
fi
function load_video {
if [ x$feature_all_video_module = xy ]; then
insmod all_video
else
insmod efi_gop
insmod efi_uga
insmod ieee1275_fb
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
fi
if [ x$feature_default_font_path = xy ] ; then
font=unicode
else
insmod part_msdos
insmod ext2
set root='hd0,msdos2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos2 --hint-efi=hd0,msdos2 --hint-baremetal=ahci0,msdos2 e36984ca-21d8-4191-ba2f-a09bf8ce6f88
else
search --no-floppy --fs-uuid --set=root e36984ca-21d8-4191-ba2f-a09bf8ce6f88
fi
font="/usr/share/grub/unicode.pf2"
fi
if loadfont $font ; then
set gfxmode=auto
load_video
insmod gfxterm
set locale_dir=$prefix/locale
set lang=en_US
insmod gettext
fi
terminal_input console
terminal_output gfxterm
if [ x$feature_timeout_style = xy ] ; then
set timeout_style=menu
set timeout=5
# Fallback normal timeout code in case the timeout_style feature is
# unavailable.
else
set timeout=5
fi
### END /etc/grub.d/00_header ###
### BEGIN /etc/grub.d/10_linux ###
menuentry 'Arch Linux' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-e36984ca-21d8-4191-ba2f-a09bf8ce6f88' {
load_video
set gfxpayload=keep
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 128c8e95-9496-49d1-9a9e-bc886662258d
else
search --no-floppy --fs-uuid --set=root 128c8e95-9496-49d1-9a9e-bc886662258d
fi
echo 'Loading Linux linux ...'
linux /vmlinuz-linux root=UUID=e36984ca-21d8-4191-ba2f-a09bf8ce6f88 rw quiet
echo 'Loading initial ramdisk ...'
initrd /initramfs-linux.img
submenu 'Advanced options for Arch Linux' $menuentry_id_option 'gnulinux-advanced-e36984ca-21d8-4191-ba2f-a09bf8ce6f88' {
menuentry 'Arch Linux, with Linux linux' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux-advanced-e36984ca-21d8-4191-ba2f-a09bf8ce6f88' {
load_video
set gfxpayload=keep
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 128c8e95-9496-49d1-9a9e-bc886662258d
else
search --no-floppy --fs-uuid --set=root 128c8e95-9496-49d1-9a9e-bc886662258d
fi
echo 'Loading Linux linux ...'
linux /vmlinuz-linux root=UUID=e36984ca-21d8-4191-ba2f-a09bf8ce6f88 rw quiet
echo 'Loading initial ramdisk ...'
initrd /initramfs-linux.img
menuentry 'Arch Linux, with Linux linux (fallback initramfs)' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux-fallback-e36984ca-21d8-4191-ba2f-a09bf8ce6f88' {
load_video
set gfxpayload=keep
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 128c8e95-9496-49d1-9a9e-bc886662258d
else
search --no-floppy --fs-uuid --set=root 128c8e95-9496-49d1-9a9e-bc886662258d
fi
echo 'Loading Linux linux ...'
linux /vmlinuz-linux root=UUID=e36984ca-21d8-4191-ba2f-a09bf8ce6f88 rw quiet
echo 'Loading initial ramdisk ...'
initrd /initramfs-linux-fallback.img
### END /etc/grub.d/10_linux ###
### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###
### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###
### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###
### BEGIN /etc/grub.d/41_custom ###
if [ -f ${config_directory}/custom.cfg ]; then
source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
### BEGIN /etc/grub.d/60_memtest86+ ###
### END /etc/grub.d/60_memtest86+ ###
And my fstab
# /etc/fstab: static file system information
# <file system> <dir> <type> <options> <dump> <pass>
# /dev/sda2 resto del disco
UUID=e36984ca-21d8-4191-ba2f-a09bf8ce6f88 / ext4 defaults,noatime,discard 0 1
# /dev/sda1 100MB
UUID=128c8e95-9496-49d1-9a9e-bc886662258d /boot ext4 defaults,noatime,discard 0 2
# /dev/sdc2 10GB
UUID=3959515c-30e4-4749-bc30-5babba3311e8 /var ext4 defaults 0 2
# /dev/sdc3 resto del disco
UUID=8ccc2ed9-35e5-4a4f-81f1-98cc8bfc4ed1 /home ext4 defaults,noatime 0 2
# /dev/sdc1
UUID=35e39da9-c942-434d-bbfc-deb5e40ee8be none swap defaults 0 0
#montaje de temp en ram
tmpfs /tmp tmpfs nodev,nosuid,size=3G 0 0
# External HDD
UUID=0ae5eb6a-8c4c-480c-8efe-609ae83f2bdc /media/External\040HDD ext4 defaults 0 0
# Seagate Expansion Drive
UUID=16668D4B668D2C95 /media/Seagate\040Expansion\040Driventfs-3g defaults,nofail 0 0
What else should I check?
Thanks in advance.
Edit: added info
Edit2: more tests.
Last edited by doblerone (2015-03-31 08:12:38)

Answer 1

Rexilion wrote:Maybe try looking at /var/log/pacman.log and see if you can downgrade packages (start with the kernel). See if that works around the problem.
Downgrading catalyst to 14.3 seems to have done the job. Thanks for the suggestion, marking as solved.
Inxsible wrote:bheinks, you have been on the forums long enough to be aware of the forum rules. Make use of an image hosting site.
Sorry, I don't post often and wasn't aware of the rules on images. I'll keep that in mind next time.