On Wed, Oct 27, 2010 at 10:22 PM, Daniel Clark <dcl...@pobox.com> wrote:
> On Tue, Mar 16, 2010 at 11:09 AM, Daniel Clark <dcl...@pobox.com> wrote: > >> While you are looking at that oh, remember this older post from Wu (as >> far as I know this is not yet fixed): >> >> We have found a bug in the 2D acceleration of sm7xx video driver, it may >> make the whole system hang when scrolling the screen, for example, if we >> copy some files from another machines to yeeloong via scp and the screen >> output is enabled, the whole system may hang. >> >> Before this bug is really fixed, please ensure CONFIG_FB_SM7XX_ACCEL is >> disabled: >> >> $ gunzip < /proc/config.gz | grep SM7XX >> CONFIG_FB_SM7XX=y >> # CONFIG_FB_SM7XX_ACCEL is not set > > > Anyone know if this is fixed in any more recent released or testing version > of Linux? > FYI testing a .32 linux with CONFIG_FB_SM7XX_ACCEL vs. without, with is about 6x faster (using a highly unscientific test of "time cat /usr/share/dict/words", got about 1600 lines/sec using CONFIG_FB_SM7XX_ACCEL=y, and 250 lines/sec without it. (Of course with it, in the past I and others have experienced hard linux lockups.) For comparison people got around 2500-4000 lines/sec on various expensive thinkpad hardware, presumably that had _ACCEL for their graphics chipsets enabled. Also I couldn't find anything about the CONFIG_FB_SM7XX_ACCEL=y bug in https://bugzilla.kernel.org - I'm looking for other places that describe it in order to put a bug report in there, unless someone with more of a clue of what the actual problem is would like to do so. -- \|/ Daniel JB Clark | Activist; Owner FREEDOM -+-> INCLUDED ~ http://freedomincluded.com /|\ Free Software respecting hardware -- You received this message because you are subscribed to the Google Groups "loongson-dev" group. To post to this group, send email to loongson-...@googlegroups.com. To unsubscribe from this group, send email to loongson-dev+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/loongson-dev?hl=en.
