Hello, Peter. On Tue, Dec 13, 2022 at 03:44:49 +0000, Peter Humphrey wrote: > On Monday, 12 December 2022 18:23:28 GMT Alan Mackenzie wrote:
> > Here is the latest version of my soft scrolling patch for the gentoo > > kernel version 5.15.80. It will surely work on any reasonably recent > > kernel version, and also on future versions. The new version doesn't > > add any new functionality, it just patches the kernel giving rise to > > fewer messages from the patch utility. > You've done it again! What a fine effort. It's saved me much wailing and > gnashing of teeth. Thanks for that! > Is there any chance of enabling gpm to work with it? That would save > yet more generations of tooth enamel. :) Yes, that's been annoying me for some time, too - when the screen is scrolled, and one tries to mark a portion of text with GPM, it gets the text that was on the screen before the scroll, and corrupts the display of the text. I had a look at it last night, and the problem is that the kernel doesn't currently store the 32-bit unicode characters which have been scrolled off the screen - just the 8-bit character glyph codes together with the 8-bit colour information. So it would triple the amount of information stored for each character position. That surely shouldn't be a problem on today's machines, though - even with FRAMEBUFFER_CONSOLE_SOFT_SCROLLBACK_SIZE set to 512 kB, that would only be 1.5 MB per console. So yes, this should be doable. It's definitely more than a day's work, almost certainly less than a month's. I'll see what I can manage. > Seriously, though, it's just wonderful as it is, and we all owe you a debt. Thanks again! > -- > Regards, > Peter. -- Alan Mackenzie (Nuremberg, Germany).
