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Hello,
due to a lack of time I left my HTPC alone for a while. Now I decided to do a fresh reinstall because I tried out too much things with the previous setup.
I got the archlinux-2014.05.01-dual.iso and could not manage to boot. I see the boot messages and then the screen turns black, so quick that I could not read anything. This seems to be related to an issue I had before but no one could help and I did not have much spare time since then so I left the system alone. So with nomodesettings in the kernel command line booting was possible and I installed the system in UEFI mode.
But since this setting would render the whole computer useless as a HTPC, I was trying some command line options and ended with acpi=off.
With this, I am able to boot to LXDM which then starts XBMC. Low CPU usage on video playback indicates that hardware decoding is used.
Has anyone here an idea where this problem might have its origin and how to solve it?
I think I read that acpi=off is bad since it disables all the nice power saving features... linux-lts boots fine, without any command line option.
Hardware:
Mainboard: MSI FM2-A75IA-E53
CPU: AMD A4-5300 with Radeon HD7480D
Last edited by And1G (2014-05-24 22:55:51)
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This problem still exists with linux-3.15.1-1.
As it seems that no one in this forum could help me on this one, could you at least give me some pointers where I could possibly get some help? Or is the description not detailed enough? Do I need to provide further information?
I mean nearly everything seems to work but the shutdown thing is kind of annoying...
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hey I got same problem, but I think the problem is in the BIOS which not compertible with the acpi, I try everything but nothing is work. Actually mine is work with "nomodeset" but I think it's do the same thing. CMIIW. sorry for my bad english
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Do you have a similar configuration? The same mainboard?
Maybe we could find out the origin of this behaviour.
Has anyone here an idea on how to start diagnosing this?
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I have had a similar problem since the 3.14 kernel and have been running the lts kernel since. I added the following kernel parameter to my boot loader, radeon.dpm=1, which fixed my issue.
From the Arch Wiki - ATI
"dpm" is only supported on R6xx and newer chips.
See http://www.x.org/wiki/RadeonFeature/#index3h2 for details.
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radeon.dpm=1 did not make any difference...
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Are you running the oss driver or catalyst? My suggestions will only work with the oss radeon driver. In the research of my problem others had success setting the radeon.aspm and/or radeon.runpm parameters. You can run 'modinfo radeon' to get a list of all the parameters.
You might also want to look at
https://wiki.archlinux.org/index.php/Ati the Power Saving section
Last edited by Talonas (2014-06-28 17:01:19)
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I am using the OSS driver.
What makes you sure about the power saving? Is it because of the ACPI switch? I always thought ACPI only affects the CPU...
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Okay, so I have seen there is a BIOS update available, so I gave it a try and updated from version 1.x to version 2.3.
After that, the system hung at boot with "Running early hooks [udev]". After having a closer look, I saw I added the radeon module to mkinitcpio.conf. After removing it from the list, I had the same behaviour as before.
But then with "radeon.dpm=0", DPM turned off, everything seems to run fine... I am not quite sure what that means. Is there anything I can do to fix it? From what I understood, DPM is the best power management mode which kind of makes me want to use it...
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