Archlinux x86_64 not easy with HP Probook 4515s

This is a big problem I was having with OS Archlinux, the 64-bit (x86_64) on HP Laptop Probook 4515s: * Appearance: Computer sometimes hangs in the process of udev (automatically detects your hardware) ** Conjecture: Problems with Firmware or video card ATI Radeon HD 3200 (driver is installed xf86-video-ati) *** HANDLING: This item: MOD_AUTOLOAD = (yes) in the file "/ etc / rc.conf", into the: MOD_AUTOLOAD = (no) (Purpose: disable udev) Archlinux boot into command line mode, then run: # Dmesg | grep firmware (No need to know more firmware modules, and lack of any firmware) Results: ............................................ r600_cp: Failed to load firmware "radeon/R600_rlc.bin" [Drm: r600_startup] * ERROR * Failed to load firmware! Search the Archlinux forum with information on I figured out how to handle: Package "radeon_ucode" and "Radeon-initrd" on AUR.
Then add the module "Radeon" in the "base" and "udev" in the hooks of the file "/ etc / mkinitcpio.conf"
Then run: # Mkinitcpio-p kernel26 (to re-build of linux) When you edit the file "rc.conf" and restart the same, the results are even worse. So, only the ability of the kernel mode KMS to support ATI graphics card causing the error. I re-edit the file "rc.conf": MOD_AUTOLOAD = (yes), then changed to: MOD_AUTOLOAD = (no) Modules = () is changed to: modules = (sky2) (Purpose: loading driver for Marvell Ethernet network card, can connect to the Internet)
Archlinux boot into command line mode, install the package "hwdetect" then run: # Hwdetect - modules>> / tmp/4515mod.log (To record list module - driver of the computer file "/ tmp/4515mod.log")
Results: modules =(..... amd64_edac_mod drm_kms_helper .....) .....
Finally, I edit the file "rc.conf" as it seems satisfied: MOD_AUTOLOAD = (yes) Modules = (! Amd64_edac_mod! Drm_kms_helper sky2 bluetooth rfkill lib80211 WL)
** Additional explanation:
1 - When the modules load test for all modules listed in the file "/ tmp/4515mod.log" I discovered a bug with the "amd64_edac_mod"
2 - "drm_kms_helper" related to the kernel mode KMS
3 - udev not get my wifi card (Broadcom BCM4312 - Broadcom is already installed drivers from AUR-WL), I must also add "WL" and "lib80211" Modules folder in "rc.conf". I can always add "sky2", "bluetooth" and "rfkill" for sure.
(Note: The list in the file "/ tmp/4515mod.log" have both sky2, bluetooth, rfkill, WL and lib80211)