ati 7750 works w/ 3.5 & ati-drivers, not 3.6/3.7 [Solved]

[anomaly65]

Hi all,

up to date on all counts (via sabayon-weekly repository).

desktop effects (e.g. cube rotation) fails and display very sluggish/choppy when I attempt to install latest kernel 3.6 and same (but for 3.6 kernel) ati-drivers-12.10. running kernel sabayon-linux-3.5-r7 and matching ati-driver works fairly well, but none of the hardware is particularly out of date:

amd phenom x6 3.2Ghz, 16G ram
asrock 970 extreme 3 MB (9xx series chipset)
samsung 830 SSD boot drive (wow, cuts boot time and app launch times in half or more!)
several samsung HD's (all are in AHCI mode in EUFI bios) for home directories, etc.
all filesystems are xfs (bit of an xfs fan).
ATI 7750 video card, running dual monitors.
kde desktop environment, system installed from Sabayon_Linux_10_amd64_K.iso

Currently running through an repeat install of all packages "in bulk" that I can think of to get the issue running well, but any suggestions welcome of course.

[anomaly65]

Hi all,

Any way to reset the entire X and ATI configs to original/default? I've snagged /etc/ati from another system, no luck.

flgrx (x11-drivers/ati-drivers-12.10#3.5.0-sabayon) works flawlessly with the 3.5 kernel. Have tried in 3.6 and 3.7 kernel with matching driver set without any good luck. with the same version (for newer kernel) I get a black screen and frozen machine.

Any suggestions welcome!
thanks,
andy

[anomaly65]

Took some digging.

Had radeon (open source) interfering. Perhaps this may help others. Note that past the 12.6 ati-drivers in sabayon-weekly, only (roughly) ati chip/cards 5400 and newer appear to be supported.

The primary difference in kernel configs was a single line, perhaps the enable factor, but does not stop the fix described. My reading is time limited due to injury, but did manage to find this. Sorry no better explanation on this near-non-item.

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linux-3.5.0-sabayon/.config:# CONFIG_DRM_RADEON_KMS is not set
linux-3.7.0-sabayon/.config:CONFIG_DRM_RADEON_KMS=y

Changes made to repair/fix:
edit /etc/make.conf
change

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VIDEO_CARDS="fbdev vesa radeonhd"
to
VIDEO_CARDS="fbdev vesa fglrx"

Also blacklisted radeonhd in /etc/modprobe.d/blacklist
added

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blacklist radeon

Now ati-drivers (fglrx) work fine with 3.5-3.7 kernels. I have both 3.5 and 3.7 kernels installed.

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equo remove ati-drivers
equo install ati-drivers

Hope this helps others out:-) And thanks Sabayon community, You all ROCK!!!
--andy

[debashish]

Am gonna give it a try...Sabayon 10 not working after the update...new to Sabayon. Let me see if this works! Would post back soon!

I tried the above it dint worked for me , am using Intel + Radeon Hybrid. Am still facing the same issue. Any help would be appreciated!

Thanks in advance!

[anomaly65]

Had a slight incident myself, reinstalled the OS from scratch, best to follow the guidelines set in the notifications.....

I think the main requirement for kernel >3.5 and ati-drivers (proprietary) is to edit /etc/default/grub file

change

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GRUB_CMDLINE_LINUX="" 

to

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 GRUB_CMDLINE_LINUX="nomodeset"

[debashish]

I tried with

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GRUB_CMDLINE_LINUX="nomodeset" 

but its still not working. Everytime I am ending with a segmentation fault.

Someone, please please help!!!!

Thanks in advance!!!!

[anomaly65]

debashish, what video card do you have?

mine from "lspci|grep VGA" is:

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 01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Cape Verde PRO [Radeon HD 7700 Series] 

segmentation fault, usually I've gotten those on systems that need memory reseated (connections need to be cleaned) or overclocked CPU's.

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equo install stress

on the running system then execute by the example and see if it remains stable on the running 3.5 kernel.

Cheers,
andy

[debashish]

This is my video card config:

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lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Caicos [Radeon HD 6400M/7400M Series]

Thanks for the response!

[DanySK]

Also blacklisted radeonhd in /etc/modprobe.d/blacklist
added

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blacklist radeon

Thank you, that hint made me solve. I was thinking the radeon module was pulled in by xf86-video-ati, but I was actually having radeon interfering with fglrx.

[amandus]

Also blacklisted radeonhd in /etc/modprobe.d/blacklist
added

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blacklist radeon

Thank you, that hint made me solve. I was thinking the radeon module was pulled in by xf86-video-ati, but I was actually having radeon interfering with fglrx.

I got a black screen after upgrade to kernel 3.7 I have a ATI HD6310 card, do I only need to blacklist the radeon driver or must I do anything else?