linux-kernel - i915 SSC Patch

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 29 Jul 2011 13:55:35 +0100
From:	Ben Brewer <ben.brewer@...ethink.co.uk>
To:	dri-devel@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Subject: i915 SSC Patch

I've added a global SSC (Spread Spectrum Clock) parameter to the i915 
driver, since having SSC enabled breaks (distorts) VGA output on some 
Core i5/i7 chips (see https://bugs.freedesktop.org/show_bug.cgi?id=38750).
SSC is still enabled by default so the behaviour won't change but 
setting the global_use_ssc parameter will turn this feature off and 
allow affected devices to function correctly (notably the Dell Vostro 3300).

Numerous people have tested this and reported it working (as seen in the 
bug report thread) which isn't surprising considering it's a basic 
modification of Chris Wilsons work.

Any comments, or anybody willing to include this patch?

Thanks,
Ben Brewer (CodeThink)

View attachment "i915-nossc-2.patch" of type "text/plain" (5554 bytes)