Messages in this thread | | | From | Danijel Schiavuzzi <> | Subject | Re: Screen corruption in 2.4.18 | Date | Sun, 24 Mar 2002 16:07:31 +0100 |
| |
On Sunday 24 March 2002 08:05, you wrote: > On Sat, Mar 23, 2002 at 10:06:47AM -0600, Steven Walter wrote: > > > Don't get it wrong. I *do have* an VT8365. VT8365 (ProSavage KM133) is > > > somewhat the same as VT8363 (KT133), except that 8365 has an integrated > > > Savage graphics card (which *I use*). > > > > Aha... I see. And in thinking about it, I realize that my motherboard > > also has this integrated graphics card. Perhaps this is the difference? > > Unfortunately, it seems they both report the same PCI id, so I don't > > really know of a way to differentiate them. > > I can verify Danijel's report -- I have the same setup > (VT8363+VT8353, a.k.a. ProSavage KM133), and I experience the
Actually the *northbridge is VT8365* (ProSavage KM133), while it can be combined with other southbridges like VIA VT86c686A or VT86c686B (I'm using the B one.) VT8363 (KT133) is a similar chipset to KM133, and the only difference should be the integrated Savage graphics card in KM133.
> same screen corruption. Clearing only bit 7 of register 55 fixes
Well, we're not the only ones with this problem. BTW, which motherboard do you have? Maybe it's a mainboard failure (mine is a MSI MS-6340M V1). I know one more Linux user with this problem on the same M/B.
> the problem; clearing bits 5 and 6 causes the video to go all > borky. There's been another thread about it on lkml over the > last week or so. > > > I looked at that datasheet, and the datasheet for the 8363. Both said > > not to program offset 55, and both said the bits we are clearing are > > "reserved." Perhaps we should contact VIA directly, tell them the > > problem we're having with their current fix, tell them our theory, and > > ask if we're right. > > Heh, a VIA contact who knows what the hell that register does > would be nice :). > > In the meantime, I'd probably suggest a patch which looks for > clears only bit 7 of Rx55 if an 8363 and an 8365 is found. I'll > whip one up later today.
Yes, should implement some autodetection to detect VT8365 and clear only bit 7 and include it in the kernel *as soon as possible* (I don't have any kernel programming experience, so don't ask me to do so, although it should be something trivial ;))
BTW, find KM133 and KT133 datasheets here ;) * VT8363: http://www.fae.com.tw/datasheet/8363kt/DS8363040.pdf * VT8365: http://www.fae.com.tw/datasheet/8365/DS8365030.pdf
Regards,
Danijel - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |